* To store rolls a dry environment inside. * Not to subject the wheels to the dramatic temperatures of changes of temperature or close relation-coagulation. * Not to assemble a wheel cracked, dropped, notched, or differently damaged. * To make sure that guards and the work-rest are adjusted and to fix. * To employ the guards of safety which cover at least half of the wheel.



* To run a wheel lately assembled for one minute or more before grinding with him. During this test, not to be held in front of or in conformity with the wheel. * To be sure that the supports are clean, punts, and free from burs. * Not too much not to tighten the retainer nuts of support. * To check the speed of machine against the speed of maximum operation sure indicated on the grinding wheel. Never use the grinding wheel with a less evaluated speed than that of the grinding machine, and never to exceed the speed of operation maximum of a grinding wheel. *

Special warning: Never use a grinder at high speed of air with a grinding wheel like portable grinding machine. Recently much from tragic damage resulted from the use of at high speed, grinders of air of gun-handle assembled with wheels of grinding. Since the speed of these grinders of air exceeds by far the speeds evaluated maximum for wheels of grinding, a rupture potentially mortal of wheel can occur. With these machines, to employ only the discs of sandpapering specifically designed for grinders of air.

Fiber discs:

* To store the abrasive discs with 40 percent with 50 percent of humidity relative and 60 to 80 degrees of F. * To store the coated abrasive discs at least 4 inches above the surface of the floors out of concrete, far from the opened windows, out of the direct sunlight, and far from the heat sources. * To store the abrasive discs coated in their original packing. * If the packing is received damaged, the product does not employ inside. To return any product damaged to its manufacturer. * Never not to employ an abrasive disc coated with notches, cuts, tears, or any other damage obvious.

* To employ only one disc which comes into contact with entirely the trimming of help. Never not to employ a deformed disc. * To start a tool right in addition to object and to bring it until the full speed of operation before beginning grinding or sandpapering. * To always relieve the disc of fiber in the object to 5 - with 10 degrees to fish on the surface of object. * Never not to change the size or the shape of an abrasive disc or its trimming of help. * If you employ has see-with through the disc (with the hollow holes), not to start the equipment before making sure that no object exceeds by one of the holes.

Even if you employ gritting right to obtain made work, to remember to which important point it is to use the equipment of grinding and sandpapering like if your life depended on it. Only then can you ensure the largest productivity, economies, and safety.