Covers power-transmission belts of all kinds, except these when running at 250 feet per minute or less: flat belts 1 inch or less wide, flat belts 2 inches or less wide without metal lacings, round belts 1/2 inch or less in diameter, and single-strand V-belts 13/32 inch wide or less. Vertical and inclined belts up to 2 1/2 inches wide running under 1,000 feet per minute without metal lacings may be protected by a nip-point guard at the belt and pulley; in textiles only side and face sections of such guards are needed if they extend at least 6 inches beyond the rim on in-running and off-running sides and 2 inches away elsewhere. Prime movers: flywheels with any part 7 feet or less above the floor or platform are guarded by metal or wire enclosure, or by guardrails 15 to 20 inches from the rim (plus a toeboard if the wheel extends into a pit or is within 12 inches of the floor); a flywheel rim protruding through a working floor is fully enclosed or railed with toeboard; smooth-rim flywheels 5 feet or less across may use a spoke-covering disk with an open space not over 4 inches; flywheels above work areas need guards able to hold the wheel if the shaft or mounting fails. Cranks, connecting rods, tail rods and extension piston rods exposed to contact are guarded, rods with 15 to 20 inch clearance when using a guardrail. Shafting is secured against endwise movement; horizontal shafting 7 feet or less from the floor is enclosed by a stationary casing or trough, trough sides under bench machines coming within 6 inches of the table or floor and extending 2 inches past the shaft; vertical and inclined shafting 7 feet or less up is enclosed; projecting shaft ends are smooth and project no more than half the shaft diameter unless capped, and unused keyways are filled or covered. Apparatus in basements, towers or rooms used only for transmission equipment may skip belt, pulley and shafting guarding only if the room is locked, passage headroom is at least 5 ft 6 in, lighting meets ANSI A11.1-1965 (R-1970) and the oiler's route is protected. Pulleys 7 feet or less up are guarded; belt guides are used where clearance is short; cracked or broken pulleys are not used; pulleys run above normal rim speed are specially designed and balanced. Horizontal belts with both runs 7 feet or less up are guarded to 15 inches above the belt or a standard height, and fully enclosed if both runs are 42 inches or less up. Overhead belts with lower parts 7 feet or less up are guarded on sides and bottom; higher overhead belts are guarded full length if over passageways or work places and running 1,800 feet per minute or more, pulley centers are 10 feet or more apart, or the belt is 8 inches or wider. Other duties cover passage between belt runs, overhead chain drives, vertical and cone-pulley belts (cone within 3 feet of floor guarded to 3 feet), belt tighteners, gears (enclosure, 7-foot standard guard, or band guard with 6-foot disk or enclosure), sprockets and chains below 7 feet, self-closing oiling openings, friction drives, projecting keys and setscrews, cylindrical collars, couplings, fastened drip cups, clutches 7 feet or less up in stationary guards, permanent belt shifters on installations since August 31, 1971, shifter handles cut off at 6 ft 6 in where the shifter is not directly over a machine or bench, belt perches and no metal belt fasteners on hand-shifted or unguarded belts. Guards use listed metals braced every 3 feet; wood only in named industries including construction; overhead belt guards specified widths; guardrails 42 inches high with midrail, posts no more than 8 feet apart, toeboards 4 inches or more. Transmission equipment must be inspected at least every 60 days and kept in good working order, with shafting, bearings, hangers, pulleys and belts maintained and oiling done when stopped where possible by oilers in tight-fitting clothing.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.