(51) Slide means the main reciprocating press member. In addition when unthreaded hole wheels are specified the inside flat, K dimension, shall be large enough to accommodate a suitable flange. The stop control shall override any other control, and reactuation of the clutch shall require use of the operating (tripping) means which has been selected. 14, 1988; 54 FR 24333, June 7, 1989; 61 FR 9240, Mar. (3) Feed rolls shall be guarded by a hood or suitable guard to prevent the hands of the operator from coming in contact with the in-running rolls at any point. (iii) Special handtools for placing and removing material shall be such as to permit easy handling of material without the operator placing a hand in the danger zone. (3) Cylinder draining. (v) The safety distance (Ds) from the sensing field of the presence sensing device to the point of operation shall be greater than or equal to the distance determined by the formula: Hs = Hand speed constant of 63 inches per second (1.6 m/s). Agree to terms and conditions established by OSHA in the grant of recognition on matters such as exchange of data, submission of accident reports, and assistance in studies for improving PSDI or the certification/validation process. (a) As used in 1910.213 and 1910.214 unless the context clearly requires otherwise, the following woodworking machinery terms shall have the meaning prescribed in this paragraph. Compliance with 1910.217(h)(5)(iii) and (h)(9)(v). (ii) Straight flanges of the adaptor or sleeve type (Table O-7 and Figures O-33 and O-34) shall be undercut so that there will be no bearing on the sides of the wheel within one-eighth inch of the arbor hole. (4) Hangers. If the supplemental guards are moved, the presence sensing device would become misaligned and the press control would be deactivated. The integrated test specifications and procedures shall be made available to the validation organization. 3. (b) Abrasive discs (inserted nut, inserted washer, and projecting stud type). (ii) Spring counterbalances when used shall have the capability to hold the slide and its attachments at midstroke, without brake applied. (13) Revolving double arbor saws shall be fully guarded in accordance with all the requirements for circular crosscut saws or with all the requirements for circular ripsaws, according to the kind of saws mounted on the arbors. All dies shall be: (i) Stamped with the tonnage and stroke requirements, or have these characteristics recorded if these records are readily available to the die setter; (ii) Stamped to indicate upper die weight when necessary for air counterbalance pressure adjustment; and. (ii) Scheduling and recording the inspection of guards and point of operation protection devices at frequent and regular intervals. 29 CFR 1910 Subpart O - Machinery and Machine Guarding - 1910.212 General Requirements for All Machines 29 CFR 1926 Subpart N - Helicopters, Hoists, Elevators, and Conveyors - 1926.555 Conveyors U.S. Occupational Safety and Health Administration Publication, "Safeguarding Equipment and Protecting Employees from Amputations", OSHA 3170-02R, 2007 (Ts is defined as the sum of the kinetic energy dissipation time plus the pneumatic/magnetic/hydraulic reaction time of the clutch/brake operating mechanism(s).). (1) Dull, badly set, improperly filed, or improperly tensioned saws shall be immediately removed from service, before they begin to cause the material to stick, jam, or kick back when it is fed to the saw at normal speed. All guards for inclined belts shall be arranged in such a manner that a minimum clearance of seven (7) feet is maintained between belt and floor at any point outside of guard. f. The instrument used to measure reaction time shall be calibrated to be accurate to within 0.001 second. The areas covered by this set of standards include: (4) Hand feeding tools. The Office of the Federal Register publishes documents on behalf of Federal agencies but does not have any authority over their programs. (49) Single stroke means one complete stroke of the slide, usually initiated from a full open (or up) position, followed by closing (or down), and then a return to the full open position. Steam or air piping shall conform to the specifications of American National Standard ANSI B31.1.0-1967, Power Piping with Addenda issued before April 28, 1971, which is incorporated by reference as specified in 1910.6. (v) For cutting-off wheels larger than 16 inches diameter and where speed does not exceed 14,200 surface feet per minute, safety guards as specified in Figures O-27 and O-28, and in Table O-1 shall be used. (9) Ring rolls mean a class for forging equipment used for shaping weldless rings from pierced discs or thick-walled, ring-shaped blanks between rolls which control wall thickness, ring diameter, height and contour. (d) As used in 1910.217, unless the context clearly requires otherwise, the following power press terms shall have the meaning prescribed in this paragraph. It is recommended, however, that no projecting setscrews or oilcups be used in any revolving pulley or part of machinery. The provisions of paragraph (h) of this section shall apply to boltheading. (6) Part revolution clutch means a type of clutch that can be disengaged at any point before the crankshaft has completed a full revolution and the press slide a full stroke. Based upon this determination, a scale shall be developed to indicate the allowable 10 percent of the stopping time at the top of the stroke for slide or ram overtravel due to brake wear. d. When the change of state is motion, the measurement shall be made at the completion of the motion. Grade V60-30. The validation organization's validating laboratory shall have available all testing facilities and necessary test and inspection equipment relevant to the validation of the certification of PSDI safety systems, installations and operations. (iii) Safety tripwire cable or wire center cord. Industrial Conveyor Belts & Hose; Industrial/MRO/Safety; Machine & Automation Solutions; . 1. The current OSHA standard for safe distance as a function of opening size is set forth in Table O-10 of OSHA 29 CFR 1910.217 - Mechanical Power Presses. This requirement does not apply to those elements of the control system which have no effect on the protection against point of operation injuries. The maximum angular exposure of the grinding wheel periphery and sides for safety guards used on cylindrical grinding machines shall not exceed 180. 1910.255 Resistance welding. If previous design, history and application are considered to be similar, but not equal to or more exacting than earlier experiences, the additional or partial certification/validation tests should concentrate on the areas of changed or increased requirements. The stroking selector generally includes positions for Off (Clutch Control), Inch, Single Stroke, and Continuous (when Continuous is furnished). A recognized validation organization may apply to OSHA for an expansion of its current recognition to cover other categories of PSDI certification/validation in addition to those included in the current recognition. While it is permitted to use signs to warn people of hazards in addition to those listed in this area, other accident prevention signs and tags can't have the same design and appearance. 1910.143 Nonwater carriage disposal systems. Where loose pulleys or idlers are not practicable, belt perches in form of brackets, rollers, etc., shall be used to keep idle belts away from the shafts. (1) Inspection. . 1910.23 Ladders. The validation organization and the validating laboratory shall be adequately staffed by personnel who are qualified by technical training and/or experience to conduct the validation of the certification of PSDI safety systems. The timer shall be manually adjustable, to a maximum time of 30 seconds. (7) Lubrication. In addition, the brake monitor shall be adjusted during installation certification to prevent successive stroking of the press if increases in stopping time cause an increase in the safety distance above that required by paragraph (h)(9)(v) of this section. 1910.24 Step bolts and manhole steps. 1910.427 Liveboating. Production shall not be done in the inch mode. 5. Energy delivered during each stroke may be varied. (h) Modified types 6 and 11 wheels (terrazzo). Employees are also encouraged to pay close attention to work pieces that have slots or other surface profiles that may increase the risk of entanglement. (34) Fixed barrier guard means a die space barrier attached to the press frame. The triprods shall be accessible and shall operate readily whether the rods are pushed or pulled. 1910.1000 Air contaminants. Where explosives, explosive dusts, flammable vapors or flammable liquids exist, the hazard of static sparks from shafting shall be carefully considered. (iv) The Inch operating means shall be designed to prevent exposure of the workers hands within the point of operation by: (a) Requiring the concurrent use of both hands to actuate the clutch, or. Friction brakes provided for stopping or holding a slide movement shall be inherently self-engaging by requiring power or force from an external source to cause disengagement. Such supplemental safeguarding shall consist of either additional light curtain (photo-electric) presence sensing devices or other types of guards which meet the requirements of paragraphs (c) and (h) of this section. The employer shall provide means for handling scrap from roll feed or random length stock operations. (4) Flywheels and bearings. 1910.219 - Mechanical power-transmission apparatus. (vii) Means used to actuate press stroke (foot trip, foot control, hand trip, hand control, or other). Type 27 and Type 28 wheels shall be used only with a safety guard located between wheel and operator during use. Stay on Top of Conveyor Safety - Workplace Material Handling & Safety 7, 1996]. (7) All cracked saws shall be removed from service. (xvii) Controls with internally stored programs (e.g., mechanical, electro-mechanical, or electronic) shall meet the requirements of paragraph (b)(13) of this section, and shall default to a predetermined safe condition in the event of any single failure within the system. (10) Material requirements and minimum dimensions. Where the work is applied to the wheel above the horizontal centerline, the exposure of the grinding wheel periphery shall be as small as possible and shall not exceed 60. Without hearing. 2. the hierarchy of the document. This appendix provides nonmandatory supplementary information and guidelines to assist in the understanding and use of 29 CFR 1910.217(h) to allow presence sensing device initiation (PSDI) of mechanical power presses. (A) The manufacturer's recommended test procedures for checking operation of the presence sensing device. 1910.1029 Coke oven emissions. (9) All belts, pulleys, gears, shafts, and moving parts shall be guarded in accordance with the specific requirements of 1910.219. Further, each operator shall be provided with a set-up/reset means that meets the requirements of paragraph (h)(6) of this section, and which must be actuated to initiate operation of the press in the PSDI mode. Steel castings (min. (iv) Records of the installation certification and validation and the most recent recertification and revalidation shall be maintained for each safety system equipped press by the employer as long as the press is in use. Hand feeding tools are not a point of operation guard or protection device and shall not be used in lieu of the guards or devices required in this section. OSHA intends that PSDI continue to be prohibited where present state-of-the-art technology will not allow it to be done safely. 1910.2 Definitions. (3) Work area. Appendix A to Subpart S of Part 1910 References for Further Information. The provision of a spreader in connection with grooving, dadoing, or rabbeting is not required. Bolts, nuts, and setscrews will, however, be permitted where they are covered with safety sleeves or where they are used parallel with the shafting and are countersunk or else do not extend beyond the flange of the coupling. Mills and calenders in the rubber and plastics industries. (ii) At least annually thereafter, the safety system on a mechanical power press used in the PSDI mode shall be recertified by the employer and revalidated by an OSHA-recognized third-party validation organization to meet all applicable requirements of paragraphs (a) through (h) and appendix A of this section.