California Code of Regulations
Title 8 - Industrial Relations
Division 1 - Department of Industrial Relations
Chapter 4 - Division of Industrial Safety
Subchapter 7 - General Industry Safety Orders
Group 3 - General Plant Equipment and Special Operations
Article 21 - Use, Care, and Protection of Abrasive Wheels
Table A-3 - Minimum Dimensions for Straight Adaptor Flange-for Organic Bonded Wheels over 1 1/4 Inch Thick*
Universal Citation: 8 CA Code of Regs A-3
Current through Register 2024 Notice Reg. No. 38, September 20, 2024
| Wheel Diameter | Wheel Hole Diameter | B Minimum Flange Diameter | D Minimum Thickness of Flange at Bore | E Minimum Thickness of Flange at Edge of Undercut | F * (D-E) Minimum Thickness |
| Inches | Inches | Inches | Inches | Inches | Inches |
| 12 | 4 | 6 | 7/8 | 3/8 | 1/2 |
| to | 5 | 7 | 7/8 | 3/8 | 1/2 |
| 14 | 6 | 8 | 7/8 | 3/8 | 1/2 |
| Larger than | 4 | 6 | 7/8 | 3/8 | 1/2 |
| 14 | 5 | 7 | 7/8 | 3/8 | 1/2 |
| to | 6 | 8 | 7/8 | 3/8 | 1/2 |
| 18 | 7 | 9 | 7/8 | 3/8 | 1/2 |
| 8 | 10 | 7/8 | 3/8 | 1/2 | |
| Larger than | 6 | 8 | 1 | 1/2 | 1/2 |
| 18 | 7 | 9 | 1 | 1/2 | 1/2 |
| to | 8 | 10 | 1 | 1/2 | 1/2 |
| 24 | 10 | 12 | 1 | 1/2 | 1/2 |
| 12 | 14 | 1 | 1/2 | 1/2 | |
| Larger than 24 to 30 | 12 | 15 | 1 | 1/2 | 1/2 |
| Larger than 30 to 36 | 12 | 15 | 1 3/8 | 7/8 | 1/2 |
| * For wheels under 1 1/4 inch thick F dimension shall not exceed 40% of wheel thickness. | |||||
1. New NOTE filed 11-22-85; effective thirtieth day thereafter (Register 85, No. 48).
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
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