Usage experience should also include failure data supporting adequacy of the design. (4) of this appendix. Tight and loose pulleys on all new installations made on or after August 31, 1971, shall be equipped with a permanent belt shifter provided with mechanical means to prevent belt from creeping from loose to tight pulley. The maximum anticipated working pressures in any hydraulic system on a mechanical power press shall not exceed the safe working pressure rating of any component used in that system. and 2. for the combined position. The official, published CFR, is updated annually and available below under (b) The control system shall be designed to permit an adjustment which will require concurrent pressure from both hands during the die closing portion of the stroke. Electrical and/or electronic cards or boards assembled with discreet components shall be considered a subsystem and shall require separate testing that the subsystems do not degrade in any of the following conditions: (1) Ambient temperature variation from 20 C to + 50 C. 1910.1004 alpha-Naphthylamine. OSHA has two standards specific to conveyors, its 1910 standard applying to general industry. (1) Each machine shall be so constructed as to be free from sensible vibration when the largest size tool is mounted and run idle at full speed. Where prong anchor or cupback bushing are used, this footnote does not apply. Reactivation of the clutch shall require restoration of normal air supply and use of the tripping mechanism(s). Certification/validation by similarity analysis reports should identify, in addition to the above, application of the part, component or subsystem for which certification/validation is being sought as well as data from previous usage establishing adequacy of the item. 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. Vertical and inclined belts (paragraphs (e) (3) and (4) of this section) if not more than two and one-half (2 12) inches wide and running at a speed of less than one thousand (1,000) feet per minute, and if free from metal lacings or fastenings may be guarded with a nip-point belt and pulley guard. (23) Die shoe means a plate or block upon which a die holder is mounted. You can learn more about the process (4) Openings for oiling. (12) For all circular saws where conditions are such that there is a possibility of contact with the portion of the saw either beneath or behind the table, that portion of the saw shall be covered with an exhaust hood, or, if no exhaust system is required, with a guard that shall be so arranged as to prevent accidental contact with the saw. You can (12) Safety guard means an enclosure designed to restrain the pieces of the grinding wheel and furnish all possible protection in the event that the wheel is broken in operation. Stay on Top of Conveyor Safety - Workplace Material Handling & Safety Each time the operational conditions are significantly changed (including environmental, application or facility changes, but excluding such changes as die changes or press relocations not involving revision to the safety system); c. When a failure of a significant component has occurred or a change has been made which may affect safety; or. All guards shall be rigidly braced every three (3) feet or fractional part of their height to some fixed part of machinery or building structure. Mounts which are affixed to the wheel by the manufacturer shall not be reused. (3) An adjustable stop shall be provided to prevent the forward travel of the blade beyond the position necessary to complete the cut in repetitive operations. Elevated clutch/brake air pressure results in longer stopping time. (1) Belts include all power transmission belts, such as flat belts, round belts, V-belts, etc., unless otherwise specified. (iii) When presses used in the PSDI mode have flywheel or bullgear running on crankshaft mounted journals and bearings, or a flywheel mounted on back shaft journals and bearings, periodic inspections following the press manufacturer's recommendations shall be made to ascertain that bearings are in good working order, and that automatic lubrication systems for these bearings (if automatic lubrication is provided) are supplying proper lubrication. (iii) Safety tripwire cable or wire center cord. (i) The operator training required by paragraph (f)(2) of this section shall be provided to the employee before the employee initially operates the press and as needed to maintain competence, but not less than annually thereafter. (4) Lathes used for turning long pieces of wood stock held only between the two centers shall be equipped with long curved guards extending over the tops of the lathes in order to prevent the work pieces from being thrown out of the machines if they should become loose. fOSHA Conveyor Standards (2) Belt shifter means a device for mechanically shifting belts from tight to loose pulleys or vice versa, or for shifting belts on cones of speed pulleys. (3) Bearings shall be kept free from lost motion and shall be well lubricated. 1910.307 Hazardous (classified) locations. (i) It shall be the responsibility of the employer to provide and insure the usage of point of operation guards or properly applied and adjusted point of operation devices on every operation performed on a mechanical power press. Solid material used for this purpose shall be of an equivalent strength and firmness. The third-party validation organization shall validate the manufacturer's certification under paragraphs 2 and 3. These guards shall cover at least the unused part of the periphery of the cutting head. It is expected that the brake monitor adjustment normally could be evaluated on the basis of the effect on the safety system certification/validation documentation retained by the validation organization. Then rotate the wheel 45 and repeat the test. California Code of Regulations, Title 8, Section 3999. Conveyors. Brake capacity shall be sufficient to stop the motion of the slide quickly and capable of holding the slide and its attachments at any point in its travel. It should also be noted that organic bonded wheels do not emit the same clear metallic ring as do vitrified and silicate wheels. All applications submitted will be accepted by OSHA, and their receipt acknowledged in writing. (ii) Two-hand trip systems on full revolution clutch machines shall incorporate an antirepeat feature. Engine rooms. (34) Fixed barrier guard means a die space barrier attached to the press frame. (ii) Posts shall be not more than eight (8) feet apart; they are to be permanent and substantial, smooth, and free from protruding nails, bolts, and splinters. (a) Attachments shall be connected to and operated only by the press slide or upper die. 1910.35 Compliance with alternate exit-route codes. OSHA Machine Guarding Standards - Machine Guard & Cover Co. (i) Diamond wheels, except certain vitrified diamond wheels. (3) Each tenoning machine shall have all cutting heads, and saws if used, covered by metal guards. b. (ii) The operating levers on hand-tripped presses having more than one operating station shall be interlocked to prevent the tripping of the press except by the concurrent use of all levers. flat belts two (2) inches or less in width which are free from metal lacings or fasteners. All contact surfaces of wheels, blotters and flanges shall be flat and free of foreign matter. Where any portion of the train of gears guarded by a band guard is less than six (6) feet from the floor a disk guard or a complete enclosure to the height of six (6) feet shall be required. 1910.109 Explosives and blasting agents. ), (5) Surface grinders and cutting-off machines. (9) Repairs and maintenance. While the employer is responsible for assuring that the certification/validation requirements in 1910.217(h)(11) are fulfilled, the design certification of PSDI safety systems may be initiated by manufacturers, employers, and/or their representatives. (5) Each wood jointer with vertical head shall have either an exhaust hood or other guard so arranged as to enclose completely the revolving head, except for a slot of such width as may be necessary and convenient for the application of the material to be jointed. When the periphery of the blades of a fan is less than seven (7) feet above the floor or working level, the blades shall be guarded. 1910.1024 Beryllium. The procedures shall be based on pertinent OSHA standards and test methods, or other publicly available standards and test methods generally recognized as appropriate in the field, such as national consensus standards or published standards of professional societies or trade associations. 14, 1988; 54 FR 24333, June 7, 1989; 61 FR 9240, Mar. If the conveyor runs at head height or carries material hung from hooks, workers in the area should remain alert to possible danger and measures should be taken to prevent workers from being accidentally struck by moving material. (i) Air-lift hammers shall have a safety cylinder head as required in paragraph (d)(1) of this section. (1) Guards. Examples: board hammers and air-lift hammers. (6) Circular saw fences shall be so constructed that they can be firmly secured to the table or table assembly without changing their alignment with the saw. If further detailing of these provisions will assist the validation organization or OSHA in this activity, this detailing will be done through appropriate OSHA Program Directives. (2) The opening in the table shall be kept as small as possible. (iii) Air-lift hammers shall be provided with two drain cocks: one on main head cylinder, and one on clamp cylinder. Subpart EExit Routes and Emergency Planning, 1910.33 Table of contents. It is recommended that old installations be changed to conform to this rule. 7. When repairing or cleaning a conveyor, all equipment must be locked or blocked and operating controls tagged. The guard shall automatically adjust itself to cover the unused portion of the head and shall remain in contact with the material at all times. Standard conditions shall be secured by the use of the following materials. (See paragraph (d)(5) of this section.). 1910.423 Post-dive procedures. It is recommended, however, that no projecting setscrews or oilcups be used in any revolving pulley or part of machinery. Higher pressures may be permitted, however, to increase clutch torque to free jammed dies, provided positive measures are provided to prevent the higher pressure at other times. (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. 1910.242 Hand and portable powered tools and equipment, general. (i) Air valve and air pressure supply/control. 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. Alternative measures for lockout/tagout | 2018-05-27 | Safety+Health 1910.11 Scope and purpose. (iii) Portable units shall be used only in areas where good, general room ventilation is provided. We're always open to new suggestions on safety training topics you'd like to see! d. When the change of state is motion, the measurement shall be made at the completion of the motion. (c) The control system shall incorporate an antirepeat feature. Guardrail shall be forty-two (42) inches in height, with midrail between top rail and floor. (i) Straight relieved flanges made according to Table O-6 and Figure O-32 shall be recessed at least one-sixteenth inch on the side next to the wheel for a distance as specified in Table O-6. (3) Conveyors. For design certification, in the first stage, the manufacturer (which can be an employer) certifies that the PSDI safety system meets the requirements of 29 CFR 1910.217 (a) through (h) and this appendix A, based on appropriate design criteria and tests. If the increase in press stopping time exceeds the brake monitor setting limit defined in paragraph (h)(5)(iii), the test shall be considered unsuccessful, and the cause of the excessive stopping time shall be investigated. (f) As used in 1910.219, unless the context clearly requires otherwise, the following mechanical power-transmission guarding terms shall have the meaning prescribed in this paragraph. (ii) The motor start button shall be protected against accidental operation. Energy delivered during each stroke may be varied. The regular oilers shall wear tight-fitting clothing. Inspection shall be made of belts, lacings, and fasteners and such equipment kept in good repair. Shall not engage in the design, manufacture, sale, promotion, or use of the certified equipment. 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. 6. (1) Inspection and maintenance records. 1910.178 Powered industrial trucks. The validation organization and/or validating laboratory shall have established written procedures for test and certification/validation of PSDI safety systems. 1910.1000 Air contaminants. (iv) All overhead parts shall be fastened or protected in such a manner that they will not fly off or fall in event of failure. 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. (xiii) The clutch/brake control shall automatically deactivate in event of failure of the power or pressure supply for the clutch engaging means. Die-setting shall not be done in the PSDI mode. Employers and manufacturers are encouraged to recommend other approaches if there is a potential for improving safety and reducing cost. The maximum angular exposure above the horizontal plane of the wheel spindle as specified in paragraphs (b) (3) and (4) of this section shall never be exceeded, and the distance between the wheel periphery and the adjustable tongue or the end of the peripheral member at the top shall never exceed one-fourth inch. (iii) The mode selection means of paragraph (b)(7)(iii) of this section shall have at least one position for selection of the PSDI mode. 7, 1996]. Pulleys with cracks, or pieces broken out of rims, shall not be used. All mechanical power transmission apparatus located in basements, towers, and rooms used exclusively for power transmission equipment shall be guarded in accordance with this section, except that the requirements for safeguarding belts, pulleys, and shafting need not be complied with when the following requirements are met: (i) The basement, tower, or room occupied by transmission equipment is locked against unauthorized entrance. (b) Guarding of abrasive wheel machinery -. Compliance with this requirement shall be determined by using the heaviest upper die to be used on the press, and operating at the fastest press speed if there is speed selection. Couplings. (1) Each circular hand-fed ripsaw shall be guarded by a hood which shall completely enclose that portion of the saw above the table and that portion of the saw above the material being cut. Pulleys shall be kept in proper alignment to prevent belts from running off. The test results shall provide the engineering data necessary to establish confidence that the hardware and software will meet specifications, the manufacturing process has adequate quality control and the data acquired was used to establish processes, procedures, and test levels supporting subsequent hardware design, production, installation and maintenance. (vi) The control system shall incorporate a timer to deactivate PSDI when the press does not stroke within the period of time set by the timer. Reactivation of the clutch shall require restoration of normal supply and the use of the tripping mechanism(s). The mounting features shall conform with all requirements of this section. Unused keyways shall be filled up or covered. (ii) Horizontal overhead belts more than seven (7) feet above floor or platform shall be guarded for their entire length under the following conditions: (a) If located over passageways or work places and traveling 1,800 feet or more per minute. This requirement does not apply to those elements of the control system which have no effect on the protection against point of operation injuries.
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