MSHA - Code of Federal Regulations - 30 CFR 57.14115
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MSHA - Title 30 CFR
30 CFR § 57.14115
Stationary grinding machines.

Stationary grinding machines, other than special bit grinders, shall be equipped with--

(a) Peripheral hoods capable of withstanding the force of a bursting wheel and enclosing not less than 270°--of the periphery of the wheel;

(b) Adjustable tool rests set so that the distance between the grinding surface of the wheel and the tool rest is not greater than 1/8 inch; and

(c) A safety washer on each side of the wheel.

[53 FR 32528, Aug. 25, 1988; 53 FR 44588, Nov. 4, 1988]