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 enough in excess chicagopneumaticminirandomorbitalsanderkitmodelcp7200s of its rated maximum speed may shatter within minutes of operation, danger may also result from a wheel run just slightly faster than its chicagopneumaticminirandomorbitalsanderkitmodelcp7200s 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 chicagopneumaticminirandomorbitalsanderkitmodelcp7200s rpm can cause the wheel to crack. This chicagopneumaticminirandomorbitalsanderkitmodelcp7200s cracking can lead to breakage later. Any of these actions sets up a chicagopneumaticminirandomorbitalsanderkitmodelcp7200s disastrous scenario that could lead to an accident involving serious injury or death.

The hazard of running man over-speed condition comes from centrifugal force. A result of rotary motion, centrifugal force is what causes a weight on the end of a string to pull the string taught when the weight is swung in a circle. This same force causes the mass of the grinding chicagopneumaticminirandomorbitalsanderkitmodelcp7200s wheel to be pulled outward from the chicagopneumaticminirandomorbitalsanderkitmodelcp7200s center of rotation chicagopneumaticminirandomorbitalsanderkitmodelcp7200s as the wheel is spinning.

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