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At AirSanders.com we specialize in air sanders, as well as any other tools you can thinks of. Our large inventory of air sanders makes sure we have the air sander in stock that you are looking for. Find hereThe hazard of running man over-speed condition comes from centrifugal force. air A result of rotary motion, centrifugal force is what causes a weight on the end of a string to pull the string board taught when the weight is swung in a circle. This same force causes the mass of the grinding wheel to be pulled outward from sander the center of rotation as the wheel is spinning. Danger air comes from the fact that centrifugal force does not increase in direct proportion to an increase board in speed, but instead it increases as the square of that speed increase. When rotational sander and air speed doubles, centrifugal force quadruples. This effect means that relatively small changes in speed can produce significant increases in force. In the board example sander mentioned, changing from 6,600 rpm to 7,700 rpm multiplies air the speed by 1.167. board However, the corresponding centrifugal force would sander multiply by a factor of 1.167 x 1.167, or 1.36. To take a more extreme example, consider the same wheel with a maximum safe operating speed of 6,600 rpm run on air a 5-inch right angle grinder at 10,000 rpm. This represents an over-speed of about 1.5 times the wheel''s designed speed. But the corresponding centrifugal force-and the corresponding rotational board and sander stress on the wheel-would be about 2.3 times as much as the maximum allowed. One potential source of serious injury in grinding comes from an oversight that is easy to make: operating the wheel in an over-speed condition. While a wheel that is run far air enough in excess of its rated maximum speed may shatter within minutes of operation, danger may also result from a wheel run just slightly faster than its rated speed. This less severe over-speed condition can cause the wheel to be damaged, and the damage may result in breakage after further use. For example, operating a reinforced, 9-inch diameter, Type 27 wheel rated for a maximum speed of 6,600 rpm on a 7-inch angle grinder with a speed of 7,700 rpm can cause the wheel to board crack. This cracking can lead to breakage later. Any of these actions sets up a disastrous sander scenario that could lead to an accident involving serious injury or death. ©2003 www.airsanders.com. All rights reserved. |