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Abrasives



Will Surface Conditioning belts or pads remove the base metal from my parts?
Surface conditioning products will generally not remove stock from your substrate material. These products will usually refine or enhance your finish. For material removal applications, a bonded abrasive or coated abrasive should be used.


What are the differences between "coated abrasives," "non-woven nylon" and "surface conditioning" products?
"Coated Abrasives" are used for material removal applications, and they are graded as grits, such as 60 grit and 120 grit. "Non-Woven Nylon" products, also known as surface conditioning products, are recommended to enhance a finish. Non-Woven Nylon products are typically graded as "Coarse", "Medium" and "Fine."


What are the optimal abrasive speeds for material removal on different metals?
The speed at which the abrasive is driven, expressed as Surface Feet Per Minute (SFPM) or Surface Meters Per Minute (SMPM) is critical for maximizing your efficiency in material removal applications. Dynabrade recommends 4,000 - 5,000 SFPM (1,219 - 1,524 SMPM) for grinding Aluminum and Carbon Steel, 2,500 - 4,000 SFPM (762 - 1,219 SMPM) when working on Nickel Alloy and Stainless Steel, and 2,000 - 3,000 SFPM (610 - 914 SMPM) when working on Titanium. Through our tests we have found that operating at the lower end of the speed range results in the highest rate of material removal, and speeds at the higher end improve the finish


Is there any advantage to using hook-face abrasives over PSA (Pressure Sensitive Adhesive) abrasives?
If you have an application where you are changing paper frequently, then there is an advantage to using a Hook-Face product. When changing abrasives often, it is likely that you are not using all the abrasive that is applied to your disc. With a Hook-Face product you can set aside your disc and easily use it later. Now you are maximizing the cost of your disc. Because of its "hook & loop" attaching system, the disc easily reattaches to the backup pad. In contrast, a PSA (Pressure Senstive Adhesive) disc is supplied with adhesive on its back, and it will stick to your backup pad. But once the disc is removed it is unlikely that the disc will have enough adhesive remaining to safely reattach to the backup pad. So the unused abrasive must be discarded. Over a period of time this can become costly

Air Tools


What does "two-step" spot repair mean?
Step 1 is the removal of a dust nib from a clear coated surface by using our Mini-Orbital Sander with an appropriate abrasive sanding disc. Step 2 involves using our Dynabuffer with a buffing compund to restore the sanded area back to its desired finish. To find out if the 2-Step process is the best solution for your sanding and buffing application, please contact your local Dynabrade representative.


Why would I use a Dynafile® II or Dynafile® III over the original Dynafile®?
While all 3 of these belt sanders are great options when working with coated abrasive sanding belts, the 40320 Dynafile® II and 15300 Dynafile® III are preferred when your application calls for the use of surface conditioning belts. The heads of these tools also have the ability to be rotated for hard-to-reach applications. The original 14000 Dynafile® is great for use with narrow belts such as 1/8" (3 mm) and 1/4" (6 mm) widths. Since the 14000 Dynafile® utilizes longer belts than the 40320 Dynafile® II or 15300 Dynafile® III, you will not have to change the belts as often.

Is SCFM the same as CFM?
Not necessarily. Both SCFM and CFM are units of measure for airflow rate. CFM (cubic feet per minute) stated alone does not provide all of the information required to understand or accurately measure airflow rate at a given condition. More information is required, such as air temperature, humidity, and air pressure. SCFM (standard cubic feet per minute) can be understood as these conditions - ISO Standard: 68¿ F, 0% Relative Humidity, 14.5 psia (or Air Pressure at Sea Level). Dynabrade states SCFM as an average maximum rating recorded at free speed for non-governed tools or at maximum horsepower for governed tools. Dynabrade adheres to expressing maximum airflow as SCFM (LPM) for the unit of measure in our catalog, related literature, and on our website


What are the advantages of using an air tool over an electric tool?
The primary advantages of using an air tool include durability and a lighter weight, compact design. Air motors rarely break down suddenly. They usually wear slowly, allowing for easy maintenance planning. Air motors run cool while the windings in an electric motor heat up, leading to tool failure and required maintenance.

Is there a difference between air pressure and air volume?
Yes. Air pressure, expressed as PSIG or Bar, is a measurement of force. Air volume, expressed as SCFM or LPM, is a measurement of volumetric flow rate. Most Dynabrade tools are rated to operate at 90 PSIG (6.2 Bar) maximum air pressure. The SCFM (LPM) ratings of the tools vary based on the motor size.


What are the main differences between geared and gearless tools?
Geared tools generally have higher torque levels than gearless tools. Gearless tools usually have fewer wearable parts, which can result in reduced maintenance and downtime.


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