PDFWAC 296-806-40504
Make sure machines have safety guards.
(1) You must use abrasive wheels only on machines that have safety guards.
(2) You must make sure the safety guard:
(a) Is mounted so it maintains proper alignment with the wheel.
(b) Is mounted with fasteners strong enough to keep the guard in position if a wheel breaks.
(c) Covers the spindle end, nut, and flange projections.
EXEMPTION: | Safety guards are not required on machines that use: |
1. Wheels for internal grinding while advancing, retracting or within the work. | |
2. Types 16, 17, 18, 18R, and 19 cones and plugs and threaded hole pot balls where either: | |
a. The work offers protection; or | |
b. The size does not exceed three inches in diameter by five inches long. | |
3. Notched, segmented, or continuous rim metal centered diamond lapidary wheels that are: | |
a. Used with a coolant deflector; and | |
b. Operated at 3,500 SFPM or less. | |
4. Type 1 reinforced wheels that are: | |
a. Three inches or less in diameter. | |
b. One-fourth inch or less thick. | |
c. Operating at peripheral speeds of 9,500 SFPM or less. | |
d. Used by operators wearing safety glasses and face shields. | |
5. Valve seating grinding wheels. | |
6. Remotely operated machines in an enclosure that will retain the pieces of a broken wheel. |