eCFR :: 29 CFR 1910.215 -- Abrasive wheel machinery.
Table O-8—Minimum Dimensions for Straight Flanges Used as Wheel Sleeves for Precision Grinding Only [In inches] Wheel diameter Wheel hole diameter B—Minimum outside diameter of flange D—Minimum thickness of flange at bore E—Minimum thickness of flange at edge of undercut; 12 to 14: 5: 7: 1/2: 7/16: Larger than 14 to 20: 5: 7: 5/8:
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