- Part Number:1926
- Part Number Title:SAFETY AND HEALTH REGULATIONS FOR CONSTRUCTION
- Subpart:1926 Subpart I
- Subpart Title:Tools - Hand and Power
- Standard Number:
- Title:General requirements.
- GPO Source:
"Types of guarding." One or more methods of machine guarding shall be provided to protect the operator and other employees in the machine area from hazards such as those created by point of operation, ingoing nip points, rotating parts, flying chips and sparks. Examples of guarding methods are - barrier guards, two-hand tripping devices, electronic safety devices, etc.
"Point of operation guarding."
"Exposure of blades." When the periphery of the blades of a fan is less than 7 feet (2.128 m) above the floor or working level, the blades shall be guarded. The guard shall have openings no larger than 1/2 inch (1.27 cm).
"Anchoring fixed machinery." Machines designed for a fixed location shall be securely anchored to prevent walking or moving.
"Guarding of abrasive wheel machinery - exposure adjustment." Safety guards of the types described in paragraphs (b)(8) and (9) of this section, where the operator stands in front of the opening, shall be constructed so that the peripheral protecting member can be adjusted to the constantly decreasing diameter of the wheel. The maximum angular exposure above the horizontal plane of the wheel spindle as specified in paragraphs (b)(8) and (9) of this section shall never be exceeded, and the distance between the wheel periphery and the adjustable tongue or the end of the peripheral member at the top shall never exceed 1/4 inch (0.635 cm). (See Figures I-1 through I-6.)
(For Figure I-1, I-2, Click Here) Correct Showing adjustable tongue giving required angle protection for all sizes of wheel used. (For Figure I-3, I-4, Click Here) Correct Showing movable guard with opening small enough to give required protection for the smallest size wheel used. (For Figure I-5, I-6, Click Here) Incorrect Showing movable guard with size of opening correct for full size wheel but too large for smaller wheel.
Bench and floor stands. The angular exposure of the grinding wheel periphery and sides for safety guards used on machines known as bench and floor stands should not exceed 90 deg. or one-fourth of the periphery. This exposure shall begin at a point not more than 65 deg. above the horizontal plane of the wheel spindle. (See Figures I-7 and I-8 and paragraph (b)(7) of this section.)
(For Figure I-7, I-8, Click Here)
Whenever the nature of the work requires contact with the wheel below the horizontal plane of the spindle, the exposure shall not exceed 125 deg. (See Figures I-9 and I-10.)
(For Figure I-9, I-10, Click Here)
Cylindrical grinders. The maximum angular exposure of the grinding wheel periphery and sides for safety guards used on cylindrical grinding machines shall not exceed 180 deg.. This exposure shall begin at a point not more than 65 deg. above the horizontal plane of the wheel spindle. (See Figures I-11 and I-12 and paragraph (b)(7) of this section.)
(For Figure I-11, I-12, Click Here)
All hand-held powered platen sanders, grinders with wheels 2-inch diameter or less, routers, planers, laminate trimmers, nibblers, shears, scroll saws, and jigsaws with blade shanks one-fourth of an inch wide or less may be equipped with only a positive "on-off" control.
All hand-held powered drills, tappers, fastener drivers, horizontal, vertical, and angle grinders with wheels greater than 2 inches in diameter, disc sanders, belt sanders, reciprocating saws, saber saws, and other similar operating powered tools shall be equipped with a momentary contact "on-off" control and may have a lock-on control provided that turnoff can be accomplished by a single motion of the same finger or fingers that turn it on.
[58 FR 35175, June 30, 1993; 61 FR 9227, March 7, 1996]