The section does not cover some small belts running at 250 feet per minute or less, such as flat belts 1 inch or less wide and flat belts 2 inches or less wide that are free from metal lacings or fasteners (the rule also lists small round belts and single strand V-belts).
Horizontal belts with both runs 7 feet or less from the floor have a guard extending at least 15 inches above the belt or to a standard height; if both runs are 42 inches or less from the floor, the belt is fully enclosed. Horizontal overhead belts more than 7 feet above the floor or platform are guarded for their entire length under the conditions the rule lists, for example when the belt is 8 inches or more in width.
Vertical and inclined belts are enclosed by a guard.
Gears are guarded by a complete enclosure; by a standard guard at least 7 feet high extending 6 inches above the mesh point of the gears; or by a band guard covering the face of the gear, with a disk guard or a complete enclosure to a height of 6 feet where any part of the gear train is less than 6 feet from the floor. Hand-operated gears used only to adjust machine parts, which do not keep moving after hand power is removed, are not covered, though guarding them is highly recommended.
Sprockets and chains are enclosed unless more than 7 feet above the floor or platform. Where the drive extends over other machine or working areas, protection against falling is provided. This does not apply to manually operated sprockets.
Projecting keys, setscrews and other projections in revolving parts are removed, made flush or guarded by a metal cover. This does not apply to keys or setscrews within gear or sprocket casings or other enclosures, nor to keys, setscrews or oilcups in hubs of pulleys less than 20 inches in diameter where they are within the plane of the rim of the pulley.
Clutches and couplings with projecting parts within 7 feet are enclosed by a stationary guard.