1. (1) You must use a blotter between each flange and the abrasive wheel surface to uniformly distribute flange pressure.
2. (2) You must make sure the blotter covers the entire flange contact area.
3. (3) You must use a new blotter each time a wheel is mounted unless the wheel has a blotter already attached to it by the manufacturer.

4. (4) You must make sure scuffed or damaged blotters are not used.

   Exemption:

   You do not need to use a blotter with:

   1. Mounted wheels;

   2. Abrasive disc and Type 2 wheels which are mounted by inserted nuts, inserted washers, or projecting studs;

   3. Plate mounted wheels;

   4. Wheels mounted in chucks (such as cylinders and segmental wheels);

   5. Types 27, 28, and 29 wheels;

   6. Type 1 and Type 27A cutting-off wheels;

   7. Internal wheels less than two inches in diameter;

   8. Diamond and cubic boron nitride wheels with metal or carbon fiber cores.

[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050. WSR 15-23-086, § 296-807-18080, filed 11/17/15, effective 12/18/15. Statutory Authority: RCW 49.17.010, [49.17].040, [49.17].050, and [49.17].060. WSR 03-09-009, § 296-807-18080, filed 4/4/03, effective 8/1/03.]