Abrasive wheels and tools. | Occupational ...
Portable abrasive wheels used for internal grinding shall be provided with safety flanges (protection flanges) meeting the requirements of paragraph (c) (6) of this section, except as follows: (c) (4) (i) When wheels 2 inches or less in diameter which are securely mounted on the end of a steel mandrel are used; (c) (4) (ii)