Guide to Dynabrade Pneumatic Belt Sanders | Features, Benefits, and Uses of The Dynafile and More

Guide to Dynabrade Pneumatic Belt Sanders | Features, Benefits, and Uses of The Dynafile and More

Posted by Mark Schieber on 18th Jun 2020

Dynabrade belt sanders are the most recognized shape in portable abrasive belt tools. Based in Clarence, New York and founded in 1969, Dynabrade is a top tier manufacturer of American made abrasive air tools. As an industry leader, their promise is to ensure that your sanding and finishing needs are met with consistency. Great attention to detail can be found in every Dynabrade product and the company prides itself on performance, quality control, and durability. Best of all, every Dynabrade industrial air tool is made in the USA. Their air-powered sanders and pneumatic files are used in a variety of heavy industries across the globe. Given the extended service life over the long term, pneumatic belt sanders often prove a more cost-effective solution than buying a comparable electric tool.

Before we get started, It should be noted that air tools do require an adequately powered air compressor to provide stable air flow, power, and speed. Also, keep in mind that although slightly louder than electric tools, air tools don’t generate as much heat and with proper lubrication, can run around the clock, 24-7. Lastly, remember that although generally more expensive, air powered tools are a long term, sustainable investment that leads to a safer workplace and less environmental waste.

Why Use a Pneumatic Belt Sander?

Some of the advantages of using Dynabrade belt sanders include:

  • Versatility –  Use one handy tool for multiple surface preparation and material removal applications
  • Throughput – Increased productivity as result of less manual, hand sanding
  • Agility – Compact size and extended reach for maneuverability in otherwise inaccessible areas
  • Ergonomics – Lightweight design for greater operator comfort over extended periods of use
  • Adaptability – Compatible with many different sanding belts when used with the right contact arm
  • Durability – A properly maintained air tool last much longer than a similar electric tool

Below is a discussion of some of the most popular Dynabrade Belt Sanders on offer and the various applications they can be used for:

The Original Dynafile 

Dynabrade’s founder, Walter Welsch, designed the original Dynafile to replace tedious hand filing and sanding. It remains the best tracking handheld abrasive belt tool on the market today. The Dynafile can be used to grind on the contact wheel (tip) or the platen pads (sides). There are a several different versions available. Here is an overview of the three series of Dynafiles on offer:

Dynafile I

● Dynafile 14000 (“The Original”), for 1/8, 1/4″, or 1/2″ wide x 24″ long belts – Includes the 11218 Contact Arm – Use this tool for turbine blade rework, cleaning off rust (using Scotch Brite style belts), grinding down welds, or sanding the inside of slatted surfaces. A heavy duty shroud protects the motor pulley and keeps debris from accumulating on and around the belts drive wheel. A spring loaded contact arm allows for quick bet changes.

Dynafile II

Dynafile II is the evolved and more ergonomic version of the original Dynafile. Also, notice how the shroud doesn’t cover the air motor of the tool allowing for better access into tight spaces. Several models are available, most come with a 1/2 HP, 20,000 RPM air motor with the exception of the slow speed 40381.

  • Dynafile II Model 40320 uses 1/8″ through 3/4″ wide x 18″ long coated abrasive sanding belts
  • Dynafile II Model 40326 uses 1/8″ through 3/4″ wide x 20-1/2″ long coated abrasive sanding belts
  • Dynafile II Model 40335 uses 1/8″ through 3/4″ wide x 18″ long non woven (Scotch Brite style) belts
  • Dynafile II Model 40381 (5,000 RPM slow speed version for use on exotic alloys) uses 1/8″ through 3/4″ wide x 18″ long coated abrasive sanding belts

● Low Profile Dynafile II: This is the compact version of the Dynafile II for work in low clearance spaces. Model 40352 accepts 1/2″ x 18″ coated abrasives belts. Model 40353 is similar to 40352, but is designed for use with non woven Scotch Brite style belts. The major difference is that the 40352 has a rubber drive wheel to prevent non woven belt slippage instead of the standard knurled metal wheel. The non-woven version is great for graining and applying decorative satin finishes to stainless steel.

● Vacuum Dynafile II Model 40330 –  3/4″ x 18″ long contact arm plus dust collection for reduced mess and improved industrial hygiene. The tool’s shroud has an exhaust port and it comes with a hose and dust collection bag. You can even hook it up to your shop-vac or central vacuum system with the right couplers.

● Mini-Dynafile II: Two different models on offer for 12″ belts (model 15003) and 13″ belts (model 15013). This is a smaller tool, ideal for working in narrow openings and performing strap style polishing. This little tool is good for taking down welds on two adjoining plates placed at a 90 degree angle. It is also handy for de-burring round cut outs or getting inside channel.

Dynafile III

● Dynafile III: Model 15300 is the highest horse power tool in the Dynafile line up. The Dynafile III features a larger 0.7 HP motor for more aggressive material removal jobs as well as a side handle so you can apply extra force to the work. Use it to blend scratch patterns, take down welds, or strap sand. The contact arms for the Dynafile II models also work with this tool.


The Dynabelter is a popular option for even heavier material removal requirements. Use it for heavy blending, weld grinding, and finishing on metal and other surfaces. The Dynabelter is similar to the Dynafile but for bigger jobs. There are three different models:

There is also the unique, but slightly odd Accu-Grinder Model 11486 which features an adjustable depth wheel to prevent undercutting and scrapping parts. The adjustable guide tires help you “stay within the lines” when applying uniform patterns and taking even passes. The Dynabelter is great for pipe and tank work and comes equipped standard with a hard durometer 2″ X 1″ contact wheel. Pro Tip: For best results the accu-grinder should be used at a 45 degree angle and pulled toward the operator (not pushed) when making your passes.

Features of the Dynabelter:

● Great for stainless steel, carbon steel, aluminum, wood, and composites

● Higher horsepower for faster material removal rates

● Safety-lock lever prevents accidental activation if the tool is dropped.

● Use it to de-burr castings, grind cylinders, and take down welds fast

● A variety of accessories are available to expand its use including contact arm extenders that allow the tool to accept belts up to 60″ long.

Dynangle I

Yet another Dynabrade original, the Dynangle I is Dynabrade’s answer to the traditional belt sander. What makes it special is that you can either slack sand tubes by removing the platen pad, or use it with the platen pad in place to grind on flat surfaces. Another money saving feature is the use of a gearless, direct drive, 0.7 HP air motor which helps keep maintenance costs down. At under five pounds the tool is light and nimble and as with all Dynabrade belts sanders, there are a variety of application specific contact arms available. Out of the box, model 14200 accepts 1″ x 18″ belts and the belt advances at 6,5450 Surface Feet Per Minute (SFM)

Features and Benefits of Dynangle I:

  • Compact (only 11″ long x 5″ tall), ideal for work in tight spots. Great for blending radiuses and graining stainless steel.
  • Fast and easy belt changes, plus the tool works great with either coated or Scotchbrite style belts
  • Multiple application specific contact arms available
  • Standard equiopoed with contact arm 14266 which is a 1″ x 18″ arm with a serrated 2″ X 1″ medium hardness rubber contact wheel.

Dynangle II

The Dynangle II is a two handed belt sander that can be used in either parallel or perpendicular to the work. Use it with the platen pad in place to surface grind, or remove the platen pad for strap polishing applications on cylindrical parts. There are three models available with either single or dual air motors depending on your horsepower requirements. The dual motor models accept two belts, allowing you to get larger jobs done in shorter amounts of time. Work slats, polish, and grind contours using this tool. Also beneficial for weld take down, surface preparation prior to welding, and blending and finishing weld seams.

Dynangle II Model 14300 – Single Motor, 1.2 HP, 13,000 RPM, 8,500 SFPM – Uses 2″ x 34″ belts and has a span of 11-1/2″ which allows you to sand cylindrical parts up to 3 feet in diameter. Dynabrade sells a conversion kit that allows you to upgrade to the dual motor version when the time is right.

Dynangle II Model 14303 – Heavy Duty, Dual Motor, 2.4 HP, 13,000 RPM, 8,500 SFPM – Uses 2″ x 34″ belts and is the same in form function as the single motor model, but with more power for bigger jobs. Note: this tool has a large CFM requirement of 106 CFM and if you want to get the most out if it you will need at least a 30 HP compressor.

Dynangle II Model 14306 – Heavy Duty, Dual Motor, 2.4 HP, 13,000 RPM, 8,500 SFPM – Super heavy duty and also just plain heavy, this is the largest Dynangle on offer. It uses 2″ x 45″ belts and the tools overall length is almost 2 feet. With a belt span of 17″ you can grind pipes up to 48″ in diameter. Both dual motor Dynangles, come with a 2″ x 6″ removable platen pad.

Features of Dynangle:

● Quick and easy belt changes

● Accepts multiple types of belts, including non-woven and coated abrasives

● Interchangeable contact arms can be used for refinishing pump screws and drilling screws

● High horsepower motor increases production rates and throughput

Take-About Sander

The Dynabrade “Take-About Sander” Model 52900, is an air powered abrasive belt tool that can be used for finishing, graining, and surface leveling. The opposing grips placed at 45 degree angles are reminiscent of an old Skil 100 planer. It is a heavy-duty (and heavy weight sander) equipped with a a robust a 1.3 hp air motor. It uses a 3″ x 24″ belt which allows for aggressive remove material on metal and wood. Perfect for use with high performance ceramic sanding belts.

Features of the Take-About Sander

● On/Off toggle switch for effortless belt tensioning

● Pistol-grip handle and top control knob for superb operator control

● Works well with your favorite brand of non-woven nylon or regular coated abrasive belts

● Safety-lock throttle lever prevents accidental activation if the tool is dropped

Kits and Accessories

Once you choose your belt sander, you might want to consider some accessories to accompany it:

Versatility Kits

Many of the tools discussed above are sold in versatility kits which, in addition to the bare tool include: abrasive belts, wrenches, replacement platen pads and a handy carrying case. The 40321 Dynafile II versatility kit is our best seller.

Contact Arms

Dynabrade offers a ton of application specific contact arms to choose from. We have most of them loaded on our website and organized by the tool that they go with. View Dynabrade Contact Arms Here You might also want to Download the Dynabrade Catalog for specifics.

Air Tool Oil

All of the air tools mentioned in this article require air tool oil. Dynabrade has there own variety as does Ingersoll Rand and Chicago Pneumatic. In a pinch, you use use any non detergent 10 weight motor oil, but actual air tool oil contains special conditioners to maximize motor vane , bearing, and o-ring life. Nevertheless, heat is the enemy and  when it come to lubrication, something is always better than nothing. Oil your rotary vane air tools frequently. We stock Ingersoll Rand 10P Air Tool in pint size bottles here at our shop.

Air Line Swivels

Air line swivels not only extend the life of your air hoses, but they extend the life of your operator’s elbow too! By installing air line swivels, workers will experience less “hose fight” and  work more comfortably which ultimately results in better productivity.There are many generic air line swivels on the market that look like this:

However, for a modern take on the airline swivel, we like the Chicago Pneumatic CP Air Flex which is made from machined 6061 aluminum. Not only does the CP Airflex rotate smoother, but it allows for better airflow to your tools, in turn maximizing air tool performance.

Filter-Regulator-Lubricator Units

Last, but not least remember that clean, dry, and lubricated air is the key to getting the most life out of your pneumatic tools. Dirty, dry air is a recipe for disaster and if you plan on paying the high price for an industrial grade air tool, you need to protect your investment. For more on FRL units, check out this blog we did a few years back: How To Maximize Air Tool Performance.

In conclusion, Dynabrade has thought of a pneumatic belt sander for nearly every application. They produce high quality, rebuildable air tools designed to help you get parts out the door faster. If you need help choosing or configuring a Dynafile, Dynabelter , or any of the other models mentioned in this article, give us a call, we are here to help.

International Air Tool Company – (619) 795-7955

San Diego, California USA

Dotco Die Grinders – The Definitive Guide | Part #1 | Background, Glossary of Terms, and Precision Die Grinders


Anyone familiar with industrial metalworking can attest to the quality and durability of the Dotco brand of pneumatic die grinders. Nevertheless, due to recent re-branding efforts by parent company Apex Tool Group (ATG), and the now seemingly interchangeable use of the Cleco and Dotco names; its hard to know what’s what or even why so many variations of a simple tool need to exist. In fact, the latest Cleco Production Tools catalog contains no less than 17 pages dedicated to collet die grinders alone.

In this two part guide, we aim to demystify the branding and clearly explain the characteristics of each tool, so you can make an informed decision when buying your next Dotco (or Cleco) die grinder.

In part #1 we discuss a brief history of the Dotco brand, a glossary of useful terms and characteristics, and finally provide an overview of the Dotco precision grinders currently in production. Part #2 of the guide will be dedicated to covering the complete line of Dotco 1/4″ collet die grinders, so stay tuned.

Dotco – What’s in a Name?

For those of you who been using industrial grade air tools for a decade or more, you may remember when the Dotco Cleco, Buckeye, Gardener Denver, and Master Power brands belonged to Cooper Power Tools out of Lexington, South Carolina. This is no longer the case. The current parent company, Apex Tool Group (ATG), was formed in 2010 through a joint venture between Danaher Corporation and Cooper Industries. The company was later sold to private equity firm Bain Capital for $1.6 Billion USD, who remains the sole owner of these brands today. All in all, Apex Tool Group (ATG) operates 20 different brands of hand and power tools and bases its headquarters in Sparks, Maryland USA.

New ownership in any organization inevitably brings change, and the re-branding of the Dotco line of grinders is no exception. The short of it is that Dotco, Cleco, and Master Power are now treated as sub-brands of what is now known as Cleco Production Tools. The original Cleco brand is still just Cleco, but the other brands have been sub-categorized as Dotco by Cleco or the Cleco MP Series (formerly Master Power). Gardner Denver and Buckeye have been discontinued entirely. Whereas in the past, the Cleco brand was associated primarily with assembly tools (and a hand full of grinders), the Cleco Production Tools moniker now covers all assembly and material removals tool in the line up.

Here is a Summary:

Cleco Production Tools Brands = Cleco, Dotco by Cleco, and Cleco MP Series

Cleco =  DC assembly tools, torque controlled pneumatic assembly tools, and some USA made material removal tools

Dotco =  USA made material removal tools

MP Series (formerly Master Power) = general purpose (import) material removal tools

Confused yet? Us too!

Die Grinder Glossary of Terms and Characteristics:

In order to fully understand what you’re getting when you buy a grinder, it’s a good idea to understand the characteristics that define them. While some of the following may seem familiar and obvious, other points are more subtle, but can prove equally as important in selecting the right tool.

  • Revolutions Per Minute (RPM) –  Good old RPM’s! If you don’t know what these are, you may need more help than this guide. Nevertheless, it’s worth pointing out that the RPM’s listed in Dotco’s catalogs are for tools that are set to 90 PSI air pressure. The RPM ratings also assume the use of a sufficiently large diameter (minimum 3/8″) air hose that will allow for adequate air flow as measured in Cubic Feet Per Minute (CFM). It should be pointed out that the RPM’s listed are free speed RPM’s (aka no load RPM’s) which means at test time, the factory basically spins the tool in the air, then measures the spindle speed with a tachometer. Air tools will not spin at the rated free speed RPM when operating under load. You should select the RPM’s of your grinder based on the abrasive that will be used with it. For obvious safety reasons, you should never the exceed the Max RPM ratings of your abrasives. Also, more is not necessarily better as different RPM tools should be selected for different applications. Horsepower also plays a major role in a tools ability to cut or grind away material. More on this later…
  • The Governor or Speed Controller – Unlike drill motors, die grinders don’t use planetary gears to regulate the speed at which the tool’s spindle turns. A governor (aka speed controller) is a small valve like device found within a tools housing which increases air flow during times of heavy load in order to maintain RPM’s constant. On right angle grinders, the speed controller in conjunction with the bevel gears determines the final RPM’s delivered to the spindle. Speed controllers are located just after an air tool’s valving, but behind the air motor itself.
  • Horse Power – An air tools horsepower is determined by the diameter of the tool’s air motor residing in the housing. The air motor assembly is comprised of a cylinder, rotor, vanes, end plates, and bearings. Compressed air introduced into the the cylinder spins the phenolic motor vanes, which then generate horsepower. The larger the diameter of the cylinder, the more horsepower that is generated. Larger air motors require larger components all around, and thus, as horsepower increases, the overall size and weight of the tool increases as well. It should be noted that higher horsepower tools also require greater air flow (CFM), so make sure your air compressor is large enough to power them. Since higher horsepower tools have a larger footprint, they are heavier in the hands of the operators. In the interest of operator comfort, only choose as much horsepower as the job at hand dictates.
  • Exhaust Direction – Most Dotco and Cleco grinders are offered with either front or rear exhaust.This choice mainly comes down to operator preference and comfort. In our experience, we have found that most end users prefer the exhaust to be routed out the rear of the tool, and 80% of the tools we sell are rear exhaust models. Nevertheless, operators using inline grinders with rear exhaust in a vertical orientation tend to get blasted with air while working a part with deep recesses (long cylindrical castings for example). In this case, a front exhaust tool might be a better choice. Additionally, some operators like the way that front exhaust tools blow away chips from the work area, making it easier to judge their work in progress. Nonetheless, OSHA has fire hazard restrictions on blowing aluminum and titanium chips around the shop floor, and it would be wise to check with your local authorities before making your tool selection.
  • Collet Series and Sizes – Both Dotco and Cleco Die Grinders are offered with HG, 200, or 300 series collets that accept accessories with shanks ranging from 1/16″ to 1/4″ in diameter. Pencil grinders typically use 1/8″ collets while traditional die grinders almost always come with 1/4″ collets.

Series HG Collets are prominent on Dotco precision and pencil grinders of both the rotary vane and turbine varieties. The HG series collets thread on to the chuck body of the tool itself.

Here is an example of a model 10R9000-03 turbine grinder with the collet removed. Note the threads on the end of the collet that faces the tool:

The 300 series collets consist of a collet cap and a nose-piece that the collet nests in. The whole three piece assembly then threads onto the tools chuck body. The 300 series system is long and slender which may offer better accessibility into recessed work areas. I have included images below for clarity:

Dotco 10LF281-36 Die Grinder with 1/4″ 300 Series Collet:

300 Series Collet System Exploded View from a Right Angle Die Grinder:

200 Series collets don’t utilize the nose piece seen above, and the collet itself nests directly into the spindle (chuck body) of the tool. Example #1 below depicts a 200 series collet system found on inline (straight) die grinder. Example #2 tool shows you what it looks like on a right angle die grinder:

Example #1 – 200 Series Collet System on an Inline Die Grinder:

Inline Die Grinder with 200 Series Collet:

Example #2 – 200 Series Collet System Found on a Right Angle Die Grinder:

The bottom line is that the the 300 series, with its slender nose piece for its accessibility into restricted work areas, features a taller, 3 piece design. The 300 series is shorter, more rugged and offers a simpler design.

The Relationship between RPM and Torque:

Dotco grinders use their motor, governor and/or bevel gears to get RPM’s to the tool’s spindle. The higher the RPM’s, the lower the stall torque of the tool. Conversely, tools with lower RPM’s are going to put out more torque and be harder to stall. Faster is not always better and you want to choose a tool based on whether you are roughing or finishing. Higher RPM tools are better for final detail work, while slower RPM tools offer faster material removal rates. Operators should let the tools RPMs and torque do the work for them. “Leaning into” a tool doesn’t yield more grinding productivity and stalling out the spindle of an air tool just to demonstrate machismo is downright dumb.

Gears or No Gears:

Most Dotco grinders are governed or geared in order to obtain the torque to speed ratios described above. However, there are gearless models available where the air motor is connected directly to the output spindle of the tool. In a right angle gearless grinder, the motor is placed vertically in the head of the tool to eliminate the need for bevel gears. Gearless models put off less vibration, but also have less torque than their geared counterparts. The main advantage of gearless grinders is that they are less expensive to maintain.

Gearless Dotco Die Grinder Model 12L302-36

The Different Series of Dotco Die Grinders:

This series of articles covers Dotco die grinders that use a collet system to mount sanding and grinding accessories. We will not cover threaded spindle tools (i.e. 5/8″-11 angle grinders) in this guide. We begin below with pencil and precision grinders, and in part #2 move on to 1/4″ inline and right angle die grinders.

Turbine and Rotary Vane Precision Pencil Grinders – These compact, high RPM grinders are ideal for light deburring, de-flashing, surface preparation, cleaning and finishing. Use these tools with carbide burrs, abrasive stones, mounted wheels, points, and molded abrasives. They are typically used for intricate detail work in mold, casting, and turbine engine applications. Precision grinders are offered with rotary vane or turbine air motors. A discussion of the various series follows:

Turbine Precision Grinders

10-90 Series Turbine Die Grinder – 100,000 RPM – .06 HP – High Speed, Low Torque Turbine Precision Grinder for Detail Work – Super Lightweight and Compact –  Weighs Less Than 0.5 Lbs and Measures Only 5.4″ Long –  1/8″ Collet – Front Exhaust – Roll Style, Variable Speed Throttle

These high quality, American made precision grinders feature a high speed turbine motor, lubrication free operation, and high precision ball bearings for extended life. A variable speed roll throttle allows you to control the RPM’s which when combined with the low runout spindle leaves a superb finish on parts. The tool is lightweight, quiet, and puts out super low vibrations which amounts to greater operator ergonomics and less fatigue. A rugged aluminium housing holds it all together.

10-95 Series Turbine Die Grinder – 80,000 RPM – .10 HP – Mid Speed, Mid Torque, Turbine Grinder for Precision Deburring Work – Traditional Die Grinder Style Body with Lever Activation – Weighs 2 Lbs – 5.8″ Long – 1/8″ Collet – Front Exhaust -Thumb Throttle Lever Start – Aluminum Housing

Less of a pencil grinder, but definitely still a precision grinder, this tool incorporates the body of a traditional inline die grinder with a high performance turbine motor for fast material removal rates. While not as compact as the 10-90 series, the 10-95 series is more rugged and better suited to operators who have been accustomed to using a standard size die grinder. Good precision grinder for guys with big hands and no lubrication required!

12R91 Series – Precision Grinder – Governed Air Motor – Turbine – 65,000 RPM – .10 HP – Weighs 0.441 Lbs. – Measures 5.8″ Long – 1/8″ Collet – Rear Exhaust – Twist throttle

The 12R91 series turbine grinders feature a governor that adjusts air intake to the motor based on the amount of load placed on the spindle. This feature is designed to prevent stalling when you are really trying to hog off material (relatively speaking, this is only a .10 HP tool). The 12R9 series is also the slowest speed Dotco Turbine Grinder and at 65,000 RPM, will produce a bit more torque than its counterparts above. Just to re-emphasize turbine air motor utilize precision ceramic bearings and do not require lubrication.

Non Turbine, Rotary Vane Precision Grinders

12-03 Series Right Angle Gearless Precision Grinder – 90 Degree Head – .10 HP – 80,000 RPM – Weighs 0.3 Lbs – Measures 5.8″ Long – 1/8″ Air Inlet – Roll Throttle – Various Over Hose Lengths Available – 1/8″ Collet

The 12-03 series is unique in that it features a gearless design. The tool uses a traditional rotary vane air motor which has been mounted vertically in the head. The output shaft of the tool connects directly to the air motor eliminating the need for a gear train. The composite body essentially contains just the valving and not much else. This is a great tool for work that requires a ninety degree approach, and the lack of gears in the head allows for decreased maintenance. At 80,000 RPM the tool falls in the middle of the pencil grinder speed range. A variable speeds roll throttle controls the fun.

10-04 Series Precision Inline Grinder – 60,000 RPM – .10 HP – Weighs 0.2 Lbs – Measures 5.8″ Long – Aluminum Housing – 1/8″ Air Inlet with Over Hoses Offered in Varying Lengths – 1/8″ Collet – Roll Throttle

The 10-04 series is a rugged, 60,000 RPM precision grinder that utilizes industrial grade ball bearings in its construction. The tool’s most notable characteristic is its durable design. With an aluminum housing and collet guard protecting moving parts from debris and impacts, the 10-04 will be part of your finishing operation for many years to come. The only disadvantage of an all metal housing tool, is that some operator’s complain that the tool gets cold during continuous use. A high quality pair of work gloves solves the problem. Exhaust air gets piped away from the workstation through the use of the supplied over hose.

12-04 Series Precision Inline Grinder – 60,000 RPM – .010 HP – Weighs 0.2 Lbs – Measures 5.8″ Long – Composite Housing – 1/8″ Air Inlet with Over Hoses Offered in Varying Lengths – 1/8″ Collet – Roll Throttle

The 12-04 series features all the functionality of the 10-04 series, with the addition of a more ergonomic composite housing to prevent cold transfer to the operator’s hands. The composite housing makes the tool slightly larger in diameter than the 10-04 series and adds a nominal amount of weight (.10 Lbs.).

Cleco MP Series (Formerly Master Power) – MP4200 & MP4201 – Weighs .43 Lbs Each – General Purpose, Rotary Vane Pencil Grinders in Right Angle and Straight Orientations – 70,000 RPM 0.10 hp (0.044 kW)

The MP Series is Cleco’s re-branded version of the old Master Power tools which were formally blue. In form and function they are the exact same and the only thing that has changed is the color of the housing. The MP Series are imports and are best suited for the value minded consumer who will give them occasional use. Nevertheless, they are slim, comfortable, and able to fit into to tight spots. The MP4200 model features double ball bearings to ensure smooth running and a longer service life. Just keep in mind, that the internal parts of these tools are not made from the purest metals, nor are they machined to the same tolerances as their industrial counterparts. For maintenance work these are a fine choice, but for production work you should choose and industrial model.

220G Series – Push-Pull Start Activation 60,000 RPM Pencil Grinder – Weighs .40 Lbs. Measures 4.6″ Long, 1/8″ Collet, Aluminum Body

The 220G is an interesting take on the industrial grade pencil grinder and is definitely designed for intensive production use. The most stand out characteristic is the tools pull style rear throttle. Internal components are machined and heat treated and the tool uses premium quality bearings to ensure low run out, high concentricity, and a long service life. This grinder is American made. Standard equipment includes an exhaust over-hose, a built in air filter, and an integrated speed controller. The 220G is offered stand alone or in a pencil grinder kit which includes an assortment of carbide burrs, mounted points, and a blow molded carrying case. Cleco even offers a model without the rear pull throttle which activates once connected to an air supply and is designed to be used in an automated / fixtured environment.

14/18 Series – Steel Body 50,000 RPM 0.1 hp (0.074 kW) Roll / Dial Throttle Precision Grinder– Weighs .50 Lbs. – Measures 3.9 Inches Long (Roll Throttle) or 5.9 Inches Long Dial Throttle – 1/8″ Collet

By far and away the most industrial Dotco precision grinder on offer. At 40,000 and 50,000 RPM respectively, the 14/18 series is where the line between precision grinder and traditional die grinder starts to blur. With its steel housing and all industrial ball bearings, If you are looking for a super duty precision grinder, you’ve just found it. At only 3.8″ long in the roll throttle version and 5.9″ long with a dial (shown above), the Dotco 14/18 is as compact as it is tough. This tool is offered standard with either 1/8″ or 1/4″ collets, but has a separate part number for each, so be sure to order the right one.

15Z Series – Air Marking Pen 20,000 RPM 0.06 hp (0.044 kW) – 1/8″ Marking Stylus – Weighs 0.3 Lbs., Measures 5.5″ Long – 1/4″ Air Inlet – Aluminum Housing

While less of a grinder and more of an engraver, this Dotco air marking pen is handy for marking tools and parts around the shop. There are certainly less expensive options out there, but by going American made, it will probably be the last pneumatic engraver you ever buy. The tool features a pull style throttle and an 1.8″ carbide tipped replaceable stylus. Buy the kit and get a durable carrying case and a 5′ air hose included. Demand Dotco quality for your industrial engraving needs.

Part #1 Wrap Up:

This concludes our first part of the this two part series. Hopefully we have provided you enough ammunition to allow you to make an informed decision when choosing your next Dotco Precision Grinder. In part two of the series, we will breakdown all the Dotco 1/4″ die grinders, which comprise the meat of their line up. Until next time, thanks for reading and happy grinding…

Mark Schieber


International Air Tool Co.

What Kind of Abrasive is Best for Your Application?

What are abrasives?Abrasives, commonly known as “sandpaper,” are used to polish or clean a hard surface by rubbing or grinding. While not made of sand – or paper – these smoothing tools can be created out a variety of different materials, all which range from fine finishing applications to heavy-duty cutting.

Is Sandpaper the Only Kind of Abrasive?

No – it’s just the most common kind. In industrial applications, abrasives like  Cutting or Cut-Off Wheels and Grinding Wheels can be paired with Pneumatic Right Angle Grinders, and  Abrasive Belt Tools to increase your plant’s or shop’s efficiency.

The two main groups of abrasives are coated and bonded.

Coated abrasives usually attach to belts, sheets, discs, and rolls. The term “coated” refers to the layered grits and grains over a surface. The classic sandpaper from everyone’s toolbox is considered a coated abrasive!


Bonded abrasives are designed for use with a grinding wheel and feature grains that have been bonded together with a binding agent or resin.


The type of material that bonded abrasives can cut depend on the grain type, bond material, and spacing – all of which we’ll cover in the next section.

What Are the Different Abrasive Grain Types & What Are They Used For? 


The classic sandpaper abrasive; While its cutting ability and durability are limited, flint is the most popular type of abrasive simply because it’s the cheapest. The grit on this natural sandpaper is created out of a natural grayish mineral.


Another type of common sandpaper, this natural abrasive is the next step up from flint. While it costs a little more, it also cuts better. Experts recommend using this reddish grit to sand bare soft wood (but not much else). Garnet has a medium hardness that makes it perfect for finishing applications.
Aluminum Oxide

Beloved by DIY-ers and manufacturers working with metal and wood, this synthetic grit is much more durable than the first two types of abrasive. Durable in applications involving tough cutting edges on a variety of workpieces:aluminum oxide abrasives are used for carbon, alloy steel, wrought iron, and bronze . Typically brown or reddish in hue, aluminum oxide can also appear blue, green, or yellow if mixed with a grinding aid or lubricant and is praised for its longevity when compared to other grains.

Pferd Type 1
Aluminum Oxide Cut-Off Wheel 

United Abrasives SAIT Type 27
Aluminum Oxide Cut-Off Wheel

Zirconia Alumina

Rough and tough cutting applications have no fear: this durable abrasive uses a mixture of aluminum oxide and zirconium oxide to create a durable surface. Zirconia Alumina Cut-Off Wheels work best with steel and steel alloys. Usually green or blue in color, zirconia alumina abrasives work best under high pressure that forces the grain to fracture and expose new sharp edges.
Silicon Carbide

With synthetic grit, silicon carbide abrasives are the hardest type of abrasive there is. Silicon Carbide gets sharper, smoother cuts on non-ferrous materials (rubber, stone, plastic, fiberglass, and glass), and cast iron, soft bronze, and aluminum . For fine smoothing applications, these abrasives can be used with oil or water. These abrasives, along with aluminum oxide abrasives, have mostly displaced emery cloth (also called black sandpaper). Silicon Carbide is known for its fast stock removal rates and friable grains that fracture sharply to expose new cutting edges for maximum efficiency.

Pferd Type 27
Silicon Carbide Grinding Wheel


Ceramic Aluminum Oxide

The top of the line abrasive, ceramic aluminum oxide capitalizes on the consistent breakdown of grains that good abrasives are known to have. Breakdowns form sharp cutting surfaces and brand-new cutting points, which are perfect when working with the hardest metals on precision grinding projects. Ceramic Aluminum Oxide Abrasives control the breakdown fracture rate down to the sub-micron level. They also provide the longest life and the fastest cut rate on metal applications and can be red or orange in color.

Pferd Type 27
Ceramic Oxide Grinding Wheel 

United Abrasives SAIT Type 27
Ceramic Grinding Wheel

Shop Our Selection of Grinding Wheels Here.


If you’re still not sure what kind of abrasive is best for your need or if you’re looking for a specific kind of abrasive, International Air Tool has your back. Contact us for expert advice on abrasive grades and types, at 800-608-5210 or

Five Reasons Why Manufacturing Professionals are Making the Switch to Coffing Electric Hoists

We all know and love our traditional Manual Chain Hoists (AKA: Chain Falls). They have a low initial price point, are well suited to lighter lifting, and don’t require electricity or compressed air. While there are some definite advantages to using traditional manual hoists, Coffing’s EC Series Electric Hoists are engineered with both high performance and versatility in mind.

Coffing Electric Hoists are designed for use on a variety of applications and don’t always have to be used exclusively with the heaviest loads to be lifted – they can be used for smaller scale projects as well (despite the conversation in our last article, where we explored the larger-scale NASCAR racecar production of their parent brand, CM/Columbus Mckinnon).

Let’s take a look at five advantages of using a Coffing Electric Hoist:

Increased Productivity

The first advantage of using an Electric Chain Hoist is simple: electric hoists are more powerful, effortless, and faster than manual chain hoists. Electric Hoists take the stress of lifting away from the operator and allow heavy materials to be lifted vertically and then moved horizontally if used in conjunction with a trolley.

Available with a variety of suspension options, the Coffing EC Hoists work well with rigid or swivel top hooks, lugs, plain, geared, and motorized trolleys.

More Productivity Features:

  • Five-Pocket Load Sheave: Provides smoother lifting, reduces chain wear, and increases chain and sheave engagement 25% (over hoists with conventional four-pocket sheaves)
  • Panel Plate: Get easy access to controls and motor leads for changing voltage on dual-voltage motors or performing hoist maintenance. Connection wires are numbered to assist with maintenance.
  • Limit Switches: Adjustable to regulate upper and lower load travel. Brass nuts are standard for improved switch setting and repeatability. Stainless steel limit switch shaft standard.

Higher Capacity Loads

With rated loads from ¼ ton all the way up to 5 tons, Coffing EC Model Hoists make it possible to comfortably lift a variety of different weight loads. Their lifts vary, too – with 10, 15, and 20-foot standard lifts available and a standard push button drop that’s 4-feet less than the hoists lift.

More Features:

  • Gearing & Transmission: First stage helical gearing on EC small frame; first and third stage helical gearing on EC large frame. Transmission gears are precision machined of alloy steel and run in an oil bath for longer, quieter operation.

Shop Coffing 1/4 Ton EC Hoists here.

Shop Coffing 1 Ton EC Hoists here.

Shop Coffing EC Hoist Trolleys here.

Lower Cost Over the Long Run

Increased efficiency and less stress on the operator helps lower workplace expenses. Once installed, the high carrying capacity saves manpower. Coffing hoists also come with a lifetime warranty on defects in materials and workmanship.

Increased Safety

Coffing EC Hoists were designed for safety: they incorporate a mechanical load brake, motor brake, and overload clutch as standard. Coffing Hoists offer the option of a large frame design that’s stocked full of strength and load bearing housings of ductile iron construction. There’s also a lighter weight option with non-load bearing housings of cast aluminum alloy and a small frame design (for motors up to 1 HP). Call for details (800) 608-5210.

More Safety Features:

  • Mechanical Load Brake: Weston type brakes control load lowering and prevent load drift. Holds rated load independent of multiple disc motor brake.
  • Multiple Disc Motor Brake: Heavy duty, direct acting design for positive load spotting and holding.
  • Overload Clutch: Protects hoist, operator, and supporting structures from damaging overloads, chain jamming, and reverse phasing.
  • Chain End Stop Assembly: Fits below dead end link on lifting chain for added measure of safety.


When well-maintained, electric hoists can serve you for many years. These Coffing Hoists are specifically built in compliance with ASME/ANSI B30.16, and CSA standard. Keep your machine in good condition with an annual inspection and cleaning.

More Durability Features:

  • Solid State Starting Switch: Standard on single phase units. Provides greater reliability and starting consistency than centrifugal switches. Fewer components to wear out or fail.
  • Ergonomic Designed Push Button Station: Fits operator’s hand for thumb or two-handed operation. 24 Volt Control available upon request. NEMA 3R (weather resistant). Constructed of glass-filled nylon for severe impact and chemical/corrosive atmosphere resistance.

Check out a configured Coffing EC Hoist in action:

Speed up your production while decreasing your operating costs, for years to come.

Still interested in a manual chain hoist? No worries – we can get you one of those too. Reach out to our team at 800-608-5210 or

Already have a Coffing Hoist? What have you done with it? We’d love to see!

The Switch to Faster, Safer NASCARS: A Case Study on Stewart-Haas Racing

In 2007, NASCAR introduced the “Car of Tomorrow” (COT) Template to offer a solution to the concern of driver safety. These templates serve as a restriction to racing teams (and their assembly facilities) because they require each car to be built to the same NASCAR specifications and guidelines of bodywork and chassis design.

The only issue with these NASCAR Cars of Tomorrows is that they don’t have much flexibility – meaning that every shop that builds cars for NASCAR must use the same large aluminum template to make sure that the requirements are met.

For most shops and manufacturers, this switch meant that they had to find a way to maintain (or even increase) efficiency while handling these new templates. Stewart-Hass Racing, one of the NASCAR assembly manufacturers, they were looking to keep production up while repetitively lowering, raising, and positioning these car-sized templates over and onto the cars themselves, with enough precision to not damage the expensive template or the even more expensive car.

Who is Stewart-Hass Racing?

Stewart-Hass Racing is a title-winning NASCAR Sprint Cup Series team co-owned by three-time Sprint Cup champion Tony Stewart and Gene Hass. They helped build the cars for their three entries from Ryan Newman, Danica Patrick, and Tony Stewart in the elite Sprint Cup series out of their 140,000-square-foot state-of-the-art facility in Kannapolis, North Carolina. They cover all parts of NASCAR building, from research and development, to assembly, and testing.

Their old shop set-up was a common electric wire rope winch that they mounted to a mobile A-frame gantry. While this method worked, it was a tedious and time-consuming challenge for their shop crews. Here’s a brief overview of the process that their team went through:

First, they raised the template, rolled the gantry with the template into the work area, positioned it over the car, then lowered it; After they checked the tolerances, they raised the template and rolled it away to continue working.

And all of that with the winch’s slow lifting speed, unreliable brake, and abruptness: all potentially dangerous to the template, brand new car, and operator.

How’d they fix it?

Tired of being slowed down, Stewart-Hass Racing decided to make a change: they installed an overhead crane system in their primary garage. In this system, they included six CM Chain Hoists (ShopStar Hoists, to be specific – with 250 lb. capacities and 20 ft. of lift). They also installed one 500 lb. capacity CM ShopStar in their Research and Development Area.

To position the NASCAR design template onto the under-construction cars, the shop paired the hoists over the three car assembly areas. With a more reliable brake than the wire rope winch, the Shopstar is equipped with a dual braking system that ensures the load will hold.

This switch to Columbus Mckinnon increased their productivity in all areas: not only did Stewart-Hass get the efficiency that they’d been craving, but they also got improved operator safety and confidence (as well as extra protection for the car and template). Repetitive raising and lowering ended up going by faster, with the ShopStar’s H4 duty cycle and 16 ft/minute lifting speed.

“[Lifting the templates off the car is] something that has to happen quickly, efficiently, and quite often. We converted over to the Shopstar because of speed, dependability, and the braking system; it made our process much more efficient by switching over,” says Greg Zippadelli, Competition Director at Stewart-Haas, “So, this makes our job a lot easier, has sped up our process significantly, and you know in racing that’s what matters.”

The CM ShopStar electric chain hoist was designed for commercial and industrial applications, featuring an H4 duty cycle (300 motor starts/hour) and capacities up to 1,000 lbs. The compact frame was constructed with a rugged cast aluminum alloy frame that’s both lightweight and durable. Safety features such as a dual braking system, 10 pocket lift wheel, and standard protector overload device ensure that heavy loads can get where they need to go.

But that’s not the only electric chain hoist offered by Columbus Mckinnon – the CM Lodestar is an economic powerhouse, available in both the Next Generation Series and Classic Series. Look up at the ceiling in any manufacturing plant and see it riddled with the classic orange hue from these industry standards. The CM Lodestar Hoist handles up to 3 Ton Capacities, making it ideal for heavy duty industrial applications. Made in the U.S.A., these H4 duty standard hoists are easy to install and maintain.

International Air Tool & Industrial Supply Company is proud to partner with Columbus McKinnon and offer these hoists worldwide. Browse all CM Hoists and their accessories here.

Have any questions about what kind hoist would best suit your needs? That’s what we’re here for! Give us a call at 800-608-5210 or shoot us an e-mail at and our well-informed team can help you out.

How Cleco’s New Line of 1.25 kW (1.7 Hp) High Performance Right Angle Grinders Re-Defines the Word “Powerful”

Designed to increase productivity, the new Cleco Production Tools Pneumatic Right Angle Grinders feature a strong 1.23 kW (1.7 Hp) motor.

The combination of a high-performance motor with a compact and lightweight body is ideal for grinding applications of any degree in foundries, shipyards, machine shops, and rolling stock in the rail transport industry. With high-impact dual-layer composite housing, this line of Pneumatic Right Angle Grinders is extremely durable and fits all Type 27, Type 27 threaded hub, and Type 1 abrasive discs.

Not only do the new Cleco pneumatic grinders have a long life of rigorous use ahead of them, but they also come with a spindle lock and a versatile 270˚ adjustable guard for increased productivity and better leverage in small spaces. Maximize material removal rates over, and over again, with the standard rear exhaust overhose and ergonomic, anti-vibration handle (which also enables quieter operation, less operator fatigue, and increased comfort).

When asked about what makes the Right Angle Grinders different, Cleco Production Tools’ Global Product Manager, Dave Bigg, says:

“Our industry is centered around making tools that increase productivity and workflow. Cleco’s new Right Angle Grinders have the power you need and the features you want, at an exceptional value.”

Here’s a Quick Overview of the Features of Cleco’s Right Angle Grinders:

  • Deliver maximum power with a high-performance 1.25 kW (1.7 Hp) motor
  • Make quick and easy abrasive changes with spindle lock
  • Access tight spaces easily with a versatile 270˚ adjustable guard
  • Withstand wear, pressure, and damage with dual-layer, high-impact composite housing
  • Increase comfort while decreasing operator fatigue with an ergonomic, anti-vibration handle
  • Enjoy quieter operation with the rear exhaust overhose standard
  • Fits all Type 27, Type 27 threaded hub and Type 1 abrasive discs
  • Use in a wide range of applications with the 4”, 4.5” and 5” disc size models

Get more information here:

See the Brochure for Cleco’s new Pneumatic Grinders here.

Read more information about these 1.7 Hp Pneumatic Right Angle Grinders on Cleco’s digital experience.

What’s your favorite feature from the new line of Pneumatic Right Angle Grinders by Cleco?

Interested in seeing if the Cleco Right Angle Grinders are right for your needs? Feel free to reach out to us at 800-608-5210 or with your comments, questions, or quote requests.

A Quick Checklist for Better Airtool Longevity and Productivity

If you’ve decided to make an air tool purchase, before you place that order, think about your current air compressor. Do you need a new one and if so, which one is right for you? Here are a couple of points to consider: will it be used for consumer DIY jobs, professional contractor applications or the more weighty commercial/industrial work? A second important factor is the frequency of use. Will it be used occasionally or every day? What are the spacing requirements – can it be moved? Consider the level of noise, your electrical requirements, accessories, ease of maintenance, parts and the availability of service. In addition, before purchasing accessories for your air tools, find out the inlet size, inlet type (NPT or BSP), air consumption (dynamic pressure) and hose diameter.

Now that you have the right air compressor, tools and accessories you need for the job (you can also take a look at what International Air Tool and Industrial Supply has to offer), don’t hesitate to ask us questions. It’s highly important that an air tool operator has a good understanding of the vocabulary and specifications of the air network before starting a project. This is also necessary to get the maximum production out of your tools.

There are two essential points to always keep in mind:

  • The dynamic air pressure of 90 psi/ 6.3 bars at the tool inlet
  • The air-flow recommendation of the tools’ manufacturers

Tool manufacturers use “torque”, “air consumption”, and “maintenance cycles” which are measured with a standard dynamic air pressure of 90 psi (pounds per square inch) /6.3 bars. This is a reference to the pressure required at the tool inlet. To ensure the best productivity and energy savings, the pressure drops that occur in the section between the pipe-end and the tool should be kept to a minimum.

Make sure to choose the right FRL (filter, regulator and lubricator). One FRL per tool is recommended and make sure the lubricator is topped up with oil. If you are unsure, the consultants at IATIS can help you. Remember, every airline accessory can create a pressure drop, so choosing the right one will improve safety and ergonomics as well as significantly reduce this occurrence.

In addition, when choosing the right hose think about its diameter, length and material. If you can, keep the hose diameter large. Choosing a shorter length will increase both its mobility and flexibility. Choose a material that is right for the work environment (e.g., exposure to heat, cold or friction). At IATIS, we recommend the use of hose whips to reduce hose bending and to protect against whiplash. The hose whip will also reduce the vibration transmission to the operator.

There are three diagnostic steps you can take to make sure that your air-compressor, accessories and tools are working as intended.

  1. 1)Read the FRL gauge regulator valve, measure dynamic pressure at the tool inlet and calculate the accessory air pressure drop.
  2. Check your tool manufacturers’ recommendations for tool inlet dimension, hose minimum size and tool air consumption.
  3. Make final measurements and any adjustments so the dynamic air pressure at the tool’s inlet reads 90/psi 6.3 bars.Remember, pressurized air can generate damages both material and physical. Make sure that all pipes, hoses and fittings have a rating of the maximum pressure of your compressor. Follow safety precautions and regularly inspect your airlines for defects. Repair or replace any defective equipment immediately. If you have any questions about your air tool network, get in touch with someone from the IATIS team and we’ll be happy to help you out. From air compressors to tools and accessories, we are your local pneumatic industry experts.

Interested in learning more about getting the most out of your pneumatic tools? Feel free to browse through our website, send us an e-mail at, or give us a call at 800-608-5210 for more information.

Introducing Cleco Industrial Air Impact Wrenches | Tough Tools. Easy Choice.

Trust Cleco air-powered impact wrenches for your toughest jobs

Whether you’re putting together a cargo ship, employed on an aviation project, working on an assembly line or automobile, Cleco’s new line of air-powered impact wrenches will deliver the performance you’re looking for. Unlike competitors such as Chicago Pneumatic (Japan) or Ingersoll Rand (China), Cleco® is a long-standing premium brand, made in America. Its expertise the result of over a century of designing, testing and manufacturing tools for a wide range of applications. The Cleco line of tough tools have long been the easy choice for increasing productivity while enhancing the users’ experience with simplicity of set-up, ease of use, as well as comfort and safety.

At International Air Tool and Industrial Supply Company, we know what important characteristics demanding technicians look for in an impact wrench: ratchet design and the maximum torque of the motor. Each of Cleco’s new line of pneumatic impact wrenches are built to deliver more controllable torque than ever before. Each model is also designed to maximize operator comfort and efficiency, increasing productivity and lessening fatigue.

The new Cleco line of impact wrenches are perfect for:


  • Lug (wheel) nuts
  • Driveshaft (CV) nuts
  • Subframe bolts
  • U-bolts/Pinch bolts
  • Construction fixings
  • Large fixings
  • Over-torqued fixings

The CWC Premium Composite Series offers users preferred features like quiet operation and lightweight design. Its one-hand push button forward and reverse action helps to maximize productivity. The CWC offers the ultimate balance of performance, ergonomics and durability.


The CWM, the “tough boy,” or Premium Metal of the new series, is the most powerful and rugged of the three. Engineered for heavy duty applications such as maritime vessels or under the wings of aviation projects, the CWM impact wrench combines a hard-hitting twin hammer mechanism and an armored metal body that can withstand years of rugged use and abuse. Easy to operate with work gloves on, the CWM also has a soft-touch grip that protects against slip, temperature and vibration. The impacting mechanism ensures trouble-free high performance in even the most challenging work environments.

High torque at an unbeatable value, the CV Series is lightweight, balanced and comfortable, an ideal tool for general industrial production. The CV is practical and rugged for quick repair jobs and maintenance work. It offers Cleco performance at a great value.

Air impact wrench users often say the tool has the best power to weight and power to volume ratio making the extra investment in an air compressor, air line, and fittings worthwhile. With regular maintenance Cleco impact wrenches generally last longer than the competition and each wrench has a one or two year warranty. Whatever industry you’re working in, International Air Tool and Industrial Supply can provide you with the tools, parts and components you need to get the job done, and if you’re looking for an impact wrench, we recommend you try the new Cleco brand.

Interested in learning more about Cleco pneumatic impact wrenches? Feel free to browse through our website, send us an e-mail at, or give us a call at 800-608-5210 for more information.

How Does A Pulse Tool Work?

Reaction-less Assembly Tools That Offer The Utmost in Precision…

Pulse nutrunners (pulse tools) are discontinuous-drive tools. They apply torque in small increments rather than in one continuous blow. When the fastener is running free, the tool doesn’t pulse and the driveshaft spins rapidly. Free speeds of 4,000 to 8,000 RPM are typical for pulse tools, with some smaller pistol-grip models topping out at 10,500 rpm. Once the fastener is snug, the tool begins pulsing, that is, applying short bursts of torque that only last a few milliseconds. Depending on the degree of hardness of the joint, 10 to 15 pulses is usually enough to tighten a fastener. Note: Due to their nature, pulse tools are not recommended for soft joints.

The source of the pulses is a unique hydraulic mechanism that consists of two rotating, cylindrical parts. The first part, called the casing, has an oblong inner chamber filled with hydraulic fluid. It’s connected to the tool’s air motor. The second part, called the anvil, fits inside the casing. The anvil is connected to the tool’s driveshaft and is bisected by two blades that are pushed outward by springs. These blades separate the chamber into two halves. As the casing rotates, the anvil’s blades contact the inner wall of the chamber, thus generating pressure.

When the tool is running at free speed, the casing and anvil rotate in unison. At this point in the cycle, the blades are not touching the inner wall of the casing, and there is no pressure on the hydraulic fluid. As the fastener provides resistance to rotation, the anvil begins to slows, but the casing continues rotating at its original speed. The blades are pushed inward toward the anvil’s center, compressing the springs. The oblong shape of the chamber combined with the compression of the blade springs reduces the volume within the chamber and increases pressure on the hydraulic fluid.

As the casing continues to rotate, fluid pressure accumulates and the anvil rotation begins to hesitate slightly. Hydraulic pressure increases, pushing against the blades and forcing the anvil to rotate. When the anvil is displaced 90 degrees from the casing, the blades are fully compressed at the seal point, which is the narrowest section of the oblong chamber. The hydraulic fluid reaches maximum pressure, and the anvil comes to a virtual stop. At this point rotational forces on the anvil are also maximized.

When the anvil pushes past the seal point and begins to move forward, the blades are again forced outward. Fluid pressure drops, and the anvil accelerates, starting another pulse cycle.

The key advantage of the pulse tool design is that the hydraulic fluid absorbs most of the vibration from the fastening process. Because torque is applied in short pulses, torque reaction is almost non-existent. Thus, allowing a pulse tool to be used without a torque reaction arm and still ensuring proper ergonomics.

Interested in learning more about pulse tools? Feel free to browse through our website, send us an e-mail at, or give us a call at 800-608-5210 for more information.


Low Vibration Needle Scalers Increase Worker Productivity & Reduce Workers Compensation Claims

Are you looking for ways to increase operator productivity while reducing the risk of worker’s comp claims? Vibration dampened needle scalers and chippers are a great way to keep operators on the job longer and reduce the risk of repetitive stress injuries like Hand Arm Vibration Syndrome (HAVS) also known as “White Finger.”
When performing coating removal, de-rusting or descaling using standard percussive tools, numbness can begin to set in after just a few hours. Workers may or may not notice the sensation at the end of their shift and the effects are cumulative. A vibration dampened needle scaler reduces the measurable vibration to about 1/10th the amount of a typical needle scaler (2.73 m/s2 vs. 24.9 m/s2). This allows an operator to work more hours per day, while mitigating the chances of incurring Hand Arm Vibration Syndrome (HAVS).
Dampened needle scales and chippers come in pistol or inline varieties and should be selected by application. You can learn more about each type of tool here:

Pistol needle scaler

Inline needle scaler

Pistol chipper

Inline chipper

Regardless of which orientation you select, vibration dampened tools help increase operator productivity by creating a safer work environment. Additionally, they reduce noise output by more than 10 decibels, which can further improve working conditions and boost employee morale.

If you have any questions about vibration dampened air tools, we are here to help. Feel free to email or give us a call at (619) 795-7955. We are happy to give you the advice you need to choose the best tool for the job.
Here’s to increased productivity!