|Roger E. Cloutier, Senior Product Safety Engineer|
|Saint-Gobain Abrasives, Inc.|
Coated abrasive discs have an excellent safety record with few reported disc breakages and personal injuries. However, breakages and personal injuries should and can be prevented. As with most accidents, operator error is a major factor, following established safety rules will reduce the probability of any such occurrences. Please review and follow the safety tips listed below.
Coated Abrasive Fiber Disc Storage:
Temperatures and humidity are the two very important factors influencing coated abrasive performance and safety. Improper or inadequate storage can damage discs making them unsafe. Backings and adhesives are sensitive to climate changes and will gain or lose moisture according to the relative humidity of their surroundings.
Excessive humidity may cause the fiber backing of a disc to absorb excessive moisture. This increase in moisture may cause the disc to curl up (convex shape like a taco shell) called cupping. Discs that are cupped or curled up should never be used. A disc in this condition may snag on the work piece causing it to break. Another potential hazard of is that excessive moisture could cause the adhesive bond to soften and cause the disc to suddenly shed or loose large amounts of abrasive grains.
Excessive dryness may cause the disc to curl or arch down in a concave manner and become brittle and lose flexibility. In short, high and low humidity's can cause concave and convex cupping respectively. See examples below:
|"The Good"||"The Bad"||"The Ugly"|
To keep your disc flat and safe please follow the list of the proper storage requirements for coated abrasive discs:
- Store abrasive disc at 40-50% relative humidity and 60-80 degrees F (15-29 degrees C).
- Coated abrasive disc must be stored at least four inches (10 or more centimeters) above the surface of concrete floors, away from open windows, out of direct sunlight and away from heat sources such as radiators, steam pipes, and air conditioner exhaust vents.
- Protect coated abrasive discs from exposure to water or other fluids/solvents.
- Always follow any abrasive manufacturer's storage instructions.
- Never use hooks when handling or transporting coated abrasive containers.
- Do not drop or in any way damage the coated abrasive packaging.
- If packaging is received damaged, the product inside must not be used. Return any damaged product to its manufacturer.
- Rotate stock, use on a first-in, first-out basis.
- Store coated abrasive discs in their original packaging.
If you comply with the above instructions and use the greatest safety tool of all, "Common Sense" you can prevent disc breakages and injuries.
For additional information on this topic or if you need any other abrasive safety information, please review ANSI, OSHA and all literature provided by the abrasive wheel and machine manufacturer. You may also contact the Saint-Gobain Product Safety Department at Tel: (508) 795-2317 or Fax: (508) 795-5120 or contact your Saint-Gobain Abrasives, Inc. representative with any safety related questions.