§ 29.122. Pulleys, sheaves and sprockets.
(a) Flange pulleys located 6 feet or less above the floor or working platform shall be guarded except for the following:
(1) Flange pulleys carrying belts less than 1 inch in width and laced with approved fasteners.
(2) Flange pulleys located within the frame of the machine and guarded by position.
(3) Flange pulleys located so that the point of contact is guarded by position, if the belt is laced with approved fasteners.
(b) Flat or crowned pulleys located six feet or less above the floor or working platform shall be guarded, except for the following:
(1) Flat or crowned pulleys carrying belts less than two inches single ply or 1 1/2 inches double ply and laced with approved fasteners.
(2) Flat or crowned pulleys located within the frame of the machine and guarded by position.
(3) Flat or crowned pulleys located so that the point of contact is guarded by position and the belt is laced with approved fasteners.
(4) When there is a danger from fire through the accumulation of fly or lint, flat or crowned pulleys carrying belts other than transmission or machine driving belts, located outside of machines and less than four feet center to center if belts are provided with approved fasteners.
(c) Pulleys carrying circular belts located 6 feet or less above the floor or working platform shall be guarded, except for the following:
(1) Pulleys carrying belts less than 1/4 inch in diameter and fastened with approved fasteners.
(2) Pulleys located within the frame of the machine and guarded by position.
(3) Pulleys located so that the point of contact is guarded by position, if the belt is laced with approved fasteners.
(d) Pulleys serving as balance wheels, such as on punch presses, on which the point of contact between the belt and pulley is more than 6 feet from the floor or platform may be guarded with a disc covering the spokes.
(e) When the bearings are not self-oiling and the clearance between the pulley and bearing on line and jack shafting is 18 inches or less, pulleys over 6 inches in diameter shall be completely guarded on the side nearest the bearing, and keyways in the shaft between such pulley and bearing shall be properly filled in or the shaft shall be enclosed.
(f) When there are overhanging pulleys on line, jack or counter shaft with no bearing between the pulley and the outer end of the shaft, a guide to prevent the belt from running off the shaft shall be provided.
(g) Cracked, broken, or welded pulleys, unless the welded pulleys are perfectly balanced, shall not be used. Pulleys shall be designed for the maximum service that they are expected to give.
(h) Sheaves located 6 feet or less above the floor or working platform shall be guarded, except for the following:
(1) Sheaves located within the frame of the machine and guarded by position.
(2) Sheaves located so that the point of contact is guarded by position, and the belt is laced with approved fasteners.
(i) Sprockets located 6 feet or less above the floor or working platform shall be guarded, except for the following:
(1) Sprockets located within the frame of the machine and guarded by position.
(2) Sprockets located so that point of contact is guarded by position.
(j) The guarding of pulleys, sheaves and sprockets shall be by one of the following methods:
(1) By full enclosure when belt, rope or chain is entirely enclosed.
(2) By partial enclosure extending from the bottom to at least the top of the pulley, sheave or sprocket on all unprotected sides except the tops and bottoms of those carrying vertical belts, ropes or chains. For pulleys, sheaves or sprockets, carrying horizontal or inclined belts, ropes or chains, a guard placed over the pulley, sheave or sprocket in exactly the same manner as for vertically installed equipment may be used.
(3) By standard railing enclosure when acceptable to the Department.
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