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. |
[Statutory Authority: RCW
49.17.010,
49.17.040,
49.17.050,
49.17.060. WSR 15-24-102, § 296-806-40504, filed 12/1/15, effective 1/5/16; WSR 04-14-028, § 296-806-40504, filed 6/29/04, effective 1/1/05.]