Use proper flanges.
(1) You must mount all abrasive wheels between flanges that have a diameter at least one-third the diameter of the wheel.
EXEMPTION: | This flange requirement does not apply to the following wheels: |
| 1. Mounted wheels (wheels permanently bonded to a shaft or mandrel). |
| 2. Abrasive disc wheels (inserted nut, inserted washer and projecting stud type). |
| 3. Plate mounted wheels. |
| 4. Cylinder, cup, or segmental wheels mounted in chucks. |
| 5. Types 27, 28, and 29 wheels. |
| 6. Internal wheels less than two inches in diameter. |
| 7. Modified Type 6 and 11 wheels (terrazzo). |
| 8. Types 1 and 27A cutting-off wheels. |
(2) You must make sure flanges are:
(a) Dimensionally accurate.
(b) Properly balanced.
(c) Flat.
(d) Free of rough surfaces or sharp edges.
(3) You must make sure the driving flange is:
(a) Part of the spindle; or
(b) Securely fastened to the spindle.
(4) You must make sure, if a wheel is mounted between two flanges, that both flanges:
(a) Are the same diameter; and
(b) Have equal bearing surfaces.
EXEMPTION: | The following wheels do not require same diameter, equal bearing surface flanges: |
| 1. Types 27, 28, and 29 wheels with adaptors. |
| 2. Modified Types 6 and 11 wheels with tapered K dimension. |
| 3. Internal wheels less than two inches in diameter. |
[Statutory Authority: RCW
49.17.010,
49.17.040,
49.17.050,
49.17.060. WSR 15-24-102, § 296-806-40516, filed 12/1/15, effective 1/5/16; WSR 04-14-028, § 296-806-40516, filed 6/29/04, effective 1/1/05.]