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PDFWAC 296-307-19012

What requirements apply to flanges?

(1) Grinding machines must have flanges.
(2) All abrasive wheels must be mounted between flanges that are at least one-third the diameter of the wheel. Regardless of flange type used, the wheel must always be guarded. Blotters must be used according to this section.
(3) Design and material requirements include:
(a) Flanges must be designed to transmit the driving torque from the spindle to the grinding wheel.
(b) Flanges must be made of steel, cast iron, or other material of equal or greater strength and rigidity.
(4) An abrasive wheel that is designed to be held by flanges must not be operated without them. Except for those types requiring flanges of a special design, flanges must be at least one-third the diameter of the wheel.
(5) Facings of compressible material (blotters) must be inserted between the abrasive wheel and flanges to ensure uniform distribution of flange pressure.
(6) All flanges must be maintained in good condition. When the bearing surfaces become damaged, they should be trued or refaced. When refacing or truing, exercise care to make sure that proper relief and rigidity is maintained before starting the wheel.
[Statutory Authority: RCW 49.17.040. WSR 98-24-096, § 296-307-19012, filed 12/1/98, effective 3/1/99. WSR 97-09-013, recodified as § 296-307-19012, filed 4/7/97, effective 4/7/97. Statutory Authority: RCW 49.17.040, [49.17.]050 and [49.17.]060. WSR 96-22-048, § 296-306A-19012, filed 10/31/96, effective 12/1/96.]
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