Washington Administrative Code › Title 296 - Labor and Industries, Department of › Chapter 296-307 - Safety standards for agriculture › INDOOR OPERATIONS › Part M - Guarding Tools and Equipment; Farm Shops; Materials Handling › Section 296-307-19009 - The use, mounting, and guarding rules for abrasive wheels

Current through Register Vol. 24-14, July 15, 2024
(1) Immediately
				  before mounting, the operator must closely inspect and sound (ring test) all
				  wheels to make sure they are not damaged. Before mounting the wheel, the
				  operator must check the spindle speed of the machine to be certain that it does
				  not exceed the maximum operating speed marked on the wheel.
Ring test
.
To tap the wheel
					 gently with a light nonmetallic implement, such as the handle of a screwdriver
					 for light wheels, or a wooden mallet for heavier wheels.
(2) Grinding wheels must fit freely on the
				  spindle and remain free under all grinding conditions. The wheel hole must be
				  made suitably oversized to ensure that heat and pressure do not create a
				  hazard.
(3) All contact surfaces of
				  wheels, blotters, and flanges must be flat and free of foreign
				  matter.
(4) Bushings used in the
				  wheel hole must not exceed the width of the wheel and must not contact the
				  flanges.
(5) On offhand grinding
				  machines, work rests must be used to support the work. The work rest must be
				  rigid and adjustable to compensate for wheel wear. Work rests must be kept
				  adjusted closely to the wheel with a maximum opening of one-eighth inch to
				  prevent the work from jamming between the wheel and the rest. The work rest
				  must be securely clamped after each adjustment and must not be adjusted with
				  the wheel in motion.
(6) Goggles or
				  face shields must be used when grinding.
(7) Nonportable grinding machines must be
				  securely mounted on substantial floors, benches, foundations, or other adequate
				  structures.
(8) After mounting,
				  abrasive wheels must be run at operating speed with the safety guard in place
				  and properly adjusted, or in a protected enclosure for at least one minute
				  before applying work. During this time, no one may stand in front of or in line
				  with the wheel.
(9) Grinders or
				  abrasive wheels that vibrate or are out of balance must be repaired before
				  use.
(10) Abrasive wheels not
				  designed for the machine or guard must not be mounted on a grinder.
(11) Side grinding must only be performed
				  with wheels designed for this purpose.
Note:
Light grinding on the side of straight wheels is
							 permitted only when very delicate pressure is applied.
(12) Where the operator may stand in front of
				  the opening, safety guards must be adjustable to compensate for wheel wear. The
				  distance between the wheel periphery and the adjustable tongue or the guard
				  above the wheel must not exceed one-quarter inch.
Statutory Authority:
						RCW
						 49.17.040. 98-24-096, § 296-307-19009,
						filed 12/1/98, effective 3/1/99. 97-09-013, recodified as § 296-307-19009,
						filed 4/7/97, effective 4/7/97. Statutory Authority:
						RCW
						 49.17.040, [49.17.]050 and [49.17.]060.
						96-22-048, § 296-306A-19009, filed 10/31/96, effective
						12/1/96.