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SubpartO1910.217Mechanicalpowerpresses.ppt
Subpart O1910.217Mechanical power presses 1910.217 Mechanical Power Presses (a) General Requirements 1910.217 (a) General Requirements (1)- (3) Reserved (4) Reconstruction and Modification (5) Excluded Machines HYDRAULIC & PNEUMATIC POWER PRESSES 1910.217 (b) Mechanical Power Press Guarding and Construction, General (1) Hazards to personnel associated with broken or falling machine components (2) Brakes (3) Machines using full revolution positive clutches (4) Foot Pedals (treadle) (5) Hand operated levers (6) Two hand trip (7) Machines using part revolution clutches (8) Electrical (9) Slide counterbalance systems (10) Air Controlling equipment (11) Hydraulic equipment (12) Pressure vessel (13) Control Reliability (14) Brake System Monitoring (i) shall incorporate a single-stroke mechanism. (ii) If the single-stroke mechanism is dependent upon spring action, the spring(s) shall be of the compression type, operating on a rod or guided within a hole or tube, and designed to prevent interleaving of the spring coils in event of breakage. (i) The pedal mechanism shall be protected to prevent unintended operation from falling or moving objects or by accidental stepping onto the pedal. (ii) A pad with a nonslip contact area shall be firmly attached to the pedal. (i) A two-hand trip shall have the individual operator's hand controls protected against unintentional operation and have the individual operator's hand controls arranged by design and construction and/or separation to require the use of both hands to trip the press and use a control arrangement requiring concurrent operation of the individual operator's hand controls. (ii) Two-hand trip systems on full revolution clutch machines shall incorporate an antirepeat feature. 1910.217(b)(6)(iii) If two-hand trip systems are used on multiple operator presses, each operator shall have a separate set of controls. (ii) A red color stop control shall be provided with the clutch/brake control system. M
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