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(a) Stationary grinding machines shall be sufficiently heavy and rigid so as to prevent dangerous vibration and shall be securely mounted on substantial floors, benches, foundations or other adequate and safe structures.
(b) Portable grinders shall not be used as bench grinders unless they are securely clamped in place, having ample clearance between the wheels and the bench, and are equipped with standard wheel and arbor end guards and tool rests. "C" clamps shall not be used to secure grinders to benches. Special band clamps or other equivalent means shall be used which encircle the machine and are secured by means of bolts.
NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
1. Amendment of subsection (b) filed 11-22-85; effective thirtieth day thereafter (Register 85, No. 48).