WAC 296-806-40510. Use a work rest for off-hand grinding

EXEMPTION: You do not need to use a work rest if: 1. The size, shape, weight or finishing area of the workpiece prevents its use; or 2. Contact with the grinding wheel below the horizontal plane of the spindle is necessary. (1) You must use a work rest to support the work. (2) You must make sure the work rest is: (a) Rigidly constructed. (b) Adjustable to compensate for wheel wear. (c) Adjusted only when the wheel is stopped. (d) Securely clamped after each adjustment. (e) Kept within one-eighth inch of the wheel.