Grinding wheel guard

Due to the fragile nature of a grinding wheel and the high speeds at which It runs, it is possible for a wheel to burst. Under the regulations, all grinding wheels must be adequately guarded and the guard be fitted at all times before the wheel is run. 

Protect employees from these types of injuries by using power tools as the manufacturer intended and do not remove guards. Inspect and ring-test grinding wheels before using them. Use appropriate personal protective equipment (PPE) like eye and face protection. 

Grinding wheels rotate at high speeds and have the potential to break apart (explode). Thus, abrasive wheel machinery and portable power tools should only be used on machines provided with safety guards, with the following exceptions ... 

Bench and floor stands. The angular exposure of the grinding wheel periphery and sides for safety guards used on machines known as bench and floor stands should not exceed 90° or one-fourth of the periphery. This exposure shall begin at a point not more than 65° above the horizontal plane of the wheel spindle. (See Figures 1-7 and 1-8 and paragraph (b)(7) of this section.)... 

Cylindrical grinders. The maximum angular exposure of the grinding wheel periphery and sides for safety guards used on cylindrical grinding machines shall not ex-... 

Before mounting the grinding wheel, the speed of the machine shall be checked to ensure that it does not exceed the maximum operating speed marked on the grinding wheel. Safety guards shall be adjusted to allow maximum protection for the grinding wheel operator. Grinding wheels shall be stored in a clean and dry location. 

Are machines guarded where necessary (e.g. bench grinding wheels, bench drills,... 

The column, guided on a dovetail slide, carries the wheelhead at its top end and contains the motor and belt drive to the wheel spindle. The column and wheelhead are raised and lowered through a screw and nut from a handwheel on the front of the machine. A telescopic guard is fitted to prevent grinding dust coming between the slide surfaces. 

Floor stand and bench mounted abrasive wheels, used for external grinding, must be provided with safety guards. 

The woodworking section covers the parts that must be guarded and the type of guards that must be used, while the abrasive-wheel section describes the amount of wheel which can be exposed for the various types of abrasive-grinding equipment Proper mounting is described for the various wheels. Charts of the minimum dimensions for abrasive wheels and their safety guards are included. 

New wheels need to run at full, no-load speed (with the guard in place) for at least a minute before they are used to grind or cut. 

Cup type wheels used for external grinding shall be protected by either a revolving cup guard or a band type guard in... 

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