The scale shall be marked to indicate that brake adjustment and/or replacement is required. Installed in the front and in the back of each mill and located within 2 inches of a vertical plane tangent to the front and rear rolls. 1910.68 Manlifts. The validation organization shall demonstrate competence and experience in either power press design, manufacture or use, or testing, quality control or certification/validation of equipment comparable to power presses and associated control systems. Mandatory requirements for certification/validation of the PSDI safety system are provided in appendix A and appendix C to this standard. Overhead rope drive and block and roller-chain-drive guards shall be not less than six (6) inches wider than the drive on each side. d. When the change of state is motion, the measurement shall be made at the completion of the motion. The guard shall effectively keep the operator's hand from coming in contact with the revolving knives. The upper run shall be so guarded as to prevent contact therewith either by the worker or by objects carried by him. A copy of the test report shall be maintained on file at the validation organization and/or validating laboratory, and shall be available to OSHA upon request. 1910.37 Maintenance, safeguards, and operational features for exit routes. In deriving the safety distance required in paragraph (h)(9)(v), all stopping time measurements should be made with clutch/brake air pressure regulated to the press manufacturer's recommended value for full clutch torque capability. The test shall be considered successful if the stopping time remains within that which is determined by paragraph (h)(9)(v) for the safety distance setting. Where a mill is so installed that persons cannot normally reach through, over, under, or around to come in contact with the roll bite or be caught between a roll and an adjacent object, then, provided such elements are made a fixed part of a mill, safety control devices listed in paragraph (b) of this section shall not apply. 1910.1005 [Reserved] (B) The safety distance shall be checked for compliance with (h)(9)(v) of this section. 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. (i) Cutting-off wheels, Types 1 and 27A (see paragraphs (c)(1) (ii) and (iii) of this section). A separate pushbutton shall be employed to activate the clutch, and the clutch shall be activated only if the driver motor is deenergized. If such a guard is constructed of sheet metal, the material used shall be not less than one-sixteenth inch in thickness; and if cast iron is used, it shall not be less than three-sixteenths inch in thickness. b. c. The manufacturer shall specify the test requirements and procedures from existing consensus tests in compliance with the provisions of the National Electrical Code. b. Abrasive wheel machinery guards shall meet the design specifications of the American National Standard Safety Code for the Use, Care, and Protection of Abrasive Wheels, ANSI B7.1-1970, which is incorporated by reference as specified in 1910.6. The results shall document the conditions under which the brake and/or clutch will and will not comply with the requirement. 20), and the openings shall be not greater than three-eighths inch. Examples: board hammers and air-lift hammers. (iv) The following are some of the machines which usually require point of operation guarding: (4) Barrels, containers, and drums. All manually operated valves and switches shall be clearly identified and readily accessible. Limitation: These wheels shall be mounted only with a special tapered flange. Preliminary disapproval. Inclined and vertical shafts, particularly inclined idler shafts, shall be securely held in position against endwise thrust. The validating organization may utilize the competence, experience, and capability of its employees to demonstrate this competence, experience and capability. The assumptions made during the analysis should be clearly stated and a description of the effects of these assumptions on the conclusions and limits should be included. Guardrail shall be forty-two (42) inches in height, with midrail between top rail and floor. (iv) Light curtains used for PSDI operation shall have minimum object sensitivity not to exceed one and one-fourth inches (31.75 mm). We're always open to new suggestions on safety training topics you'd like to see! The variance in flange diameters, the adaptor nut being less than one-third wheel diameter, and the use of side pressure in wheel operation limits the use to reinforced organic bonded wheels. Table O-8 - Minimum Dimensions for Straight Flanges Used as Wheel Sleeves for Precision Grinding Only. Appendix B to Subpart L of Part 1910National Consensus Standards The board enclosure shall be securely fastened to the hammer. (1) The employer shall report, within 30 days of the occurrence, all point-of-operation injuries to operators or other employees to either the Director of the Directorate of Standards and Guidance at OSHA, U.S. Department of Labor, Washington, DC 20210 or electronically at http://www.osha.gov/pls/oshaweb/mechanical.html; or to the State Agency administering a plan approved by the Assistant Secretary of Labor for Occupational Safety and Health. (ii) Air-lift hammers shall have an air shutoff valve as required in paragraph (d)(2) of this section. Type 28 wheels have saucer shaped grinding rims. (i) See Figures O-36 and O-37 and Table O-9 for minimum basic thickness of peripheral and side members for various types of safety guards and classes of service. 1910.217 Mechanical power presses. 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. 5. Where prong anchor or cupback bushing are used, this footnote does not apply. 6. Visors or other accessory equipment shall not be included as a part of the guard when measuring the guard opening, unless such equipment has strength equal to that of the guard. Please do not provide confidential However, where an operator must do many operations outside the press, such as lubricating, trimming, deburring, etc., a longer interval up to 30 seconds is permitted. a. 2. (58) Unitized tooling means a type of die in which the upper and lower members are incorporated into a selfcontained unit so arranged as to hold the die members in alignment. The application shall be filed with: PSDI Certification/Validation Program, Office of Variance Determination, Occupational Safety and Health Administration, U.S. Department of Labor, Room N3653, 200 Constitution Avenue, NW., Washington, DC 20210. There shall be no rough surfaces or sharp edges. 1910.423 Post-dive procedures. (10) Bolt-headers mean the same as an upsetter or forging machine except that the diameter of stock fed into the machine is much smaller, i.e., commonly three-fourths inch or less. Spacers shall be equal in diameter to the mounting flanges and have equal bearing surfaces. (ii) Brake systems on presses used in the PSDI mode shall have sufficient torque so that each average value of stopping times (Ts) for stops initiated at approximately 45 degrees, 60 degrees, and 90 degrees, respectively, of crankshaft angular position, shall not be more than 125 percent of the average value of the stopping time at the top crankshaft position. This preliminary decision will be sent to the applicant and subsequently published in the Federal Register. The bottom of the guard should come down to within three-eighths inch of a plane formed by the bottom or contact face of the feed roll where it touches the stock. (iv) For cutting-off wheels 16 inches diameter and smaller and where speed does not exceed 16,000 surface feet per minute, cast iron or malleable iron safety guards as specified in Figures O-36 and O-37, and in Table O-9 shall be used. Where passage is regarded as necessary, there shall be a platform over the lower run guarded on either side by a railing completely filled in with wire mesh or other filler, or by a solid barrier. Saws to which gum has adhered on the sides shall be immediately cleaned. (15) Pull-out device means a mechanism attached to the operator's hands and connected to the upper die or slide of the press, that is designed, when properly adjusted, to withdraw the operator's hands as the dies close, if the operator's hands are inadvertently within the point of operation. However,current OSHA regulations on the control of hazardous energy sources (lockout/tagout)[29 CFR 1910.147],and machine guarding [29 CFR Part 1910.212 ] are applicable to these types of equipment. The validation organization shall have a reasonable written procedure for acknowledging and processing appeals or complaints from program participants (manufacturers, producers, suppliers, vendors and employers) as well as other interested parties (employees or their representatives, safety personnel, government agencies, etc. (1) Each swing cutoff saw shall be provided with a hood that will completely enclose the upper half of the saw, the arbor end, and the point of operation at all positions of the saw. Expanded metal, sheet or perforated metal, and wire mesh shall be securely fastened to frame. 1910.241 Definitions. (i) Every point of operation guard shall meet the following design, construction, application, and adjustment requirements: (a) It shall prevent entry of hands or fingers into the point of operation by reaching through, over, under or around the guard; (b) It shall conform to the maximum permissible openings of Table O-10; (c) It shall, in itself, create no pinch point between the guard and moving machine parts; (d) It shall utilize fasteners not readily removable by operator, so as to minimize the possibility of misuse or removal of essential parts; (e) It shall facilitate its inspection, and. The employer shall evaluate and test the PSDI safety system installation, shall submit to the OSHA-recognized third-party validation organization the necessary supporting documentation, and shall recertify that the requirements of 1910.217(a) through (h) and this appendix are being met. This web site is designed for the current versions of switch to drafting.ecfr.gov. (i) A suitable enclosure shall be provided to prevent damaged or detached boards from falling. Where guard is exposed to contact with moving equipment additional strength may be necessary. (3) Steam hammers mean a type of drop hammer where the ram is raised for each stroke by a double-action steam cylinder and the energy delivered to the workpiece is supplied by the velocity and weight of the ram and attached upper die driven downward by steam pressure. is available with paragraph structure matching the official CFR The employer shall provide means for handling scrap from roll feed or random length stock operations. The manufacturer or the manufacturer's representative shall certify to and submit to an OSHA-recognized third-party validation organization the documentation necessary to demonstrate that the PSDI safety system design is in full compliance with the requirements of 29 CFR 1910.217(a)-(h) and this appendix A, as applicable, by means of analysis, tests, or combination of both, establishing that the following additional certification/validation requirements are fulfilled. The front and back of the band wheels shall be either enclosed by solid material or by wire mesh or perforated metal. Validation for Design Certification/Validation. This subparagraph does not apply to manually operated sprockets. Analysis: We suggest conveyor safety nets and other safe guards for overhead conveyors, even those with relatively light loads, unless the conveyor is guarded by location. (2) Calender means a machine equipped with two or more metal rolls revolving in opposite directions and used for continuously sheeting or plying up rubber and plastics compounds and for frictioning or coating materials with rubber and plastics compounds. Machinery shall be oiled when not in motion, wherever possible. 1910.162 Fixed extinguishing systems, gaseous agent. (2) Each self-feed circular ripsaw shall be provided with sectional non-kickback fingers for the full width of the feed rolls. A report shall be made of each field inspection. (iv) All a.c. control circuits and solenoid value coils shall be powered by not more than a nominal 120-volt a.c. supply obtained from a transformer with an isolated secondary. Such tools shall not be in lieu of other guarding required by this section, but can only be used to supplement protection provided. (a) Attachments shall be connected to and operated only by the press slide or upper die. (ii) Fixed or permanent lead pot installations shall be exhausted. (d) Two hand trips shall be fixed in position so that only a supervisor or safety engineer is capable of relocating the controls. (i) Presses operated in the PSDI mode shall be equipped with a brake monitor that meets the requirements of paragraphs (b)(13) and (b)(14) of this section. (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. For the Textile Industry, because of the presence of excessive deposits of lint, which constitute a serious fire hazard, the sides and face sections only of nip-point belt and pulley guards are required, provided the guard shall extend at least six (6) inches beyond the rim of the pulley on the in-running and off-running sides of the belt and at least two (2) inches away from the rim and face of the pulley in all other directions. Reaction Times. (2) Arbors and mandrels shall be constructed so as to have firm and secure bearing and be free from play. (3) Each disk sanding machine shall have the exhaust hood, or other guard if no exhaust system is required, so arranged as to enclose the revolving disk, except for that portion of the disk above the table, if a table is used, which may be necessary for the application of the material to be finished. 2. SOURCE: 39 FR 23502, June 27, 1974, unless otherwise noted. The clutch/brake control system shall be designed and constructed to prevent actuation of the clutch if all operating stations are bypassed. It is not an official legal edition of the CFR. (7) Circular saw gages shall be so constructed as to slide in grooves or tracks that are accurately machined, to insure exact alignment with the saw for all positions of the guide. 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. The use of belt poles as substitutes for mechanical shifters is not recommended. (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. tensile strength 60,000 p.s.i.) (ii) Belt shifter and clutch handles shall be rounded and be located as far as possible from danger of accidental contact, but within easy reach of the operator. Power-transmission apparatus located in basements. Immediately before mounting, all wheels shall be closely inspected and sounded by the user (ring test) to make sure they have not been damaged in transit, storage, or otherwise. (i) Machines using full revolution clutches shall incorporate a single-stroke mechanism. (12) Guard design specifications. (11) Safety system certification/validation. 1910.3 Petitions for the issuance, amendment, or repeal of a standard. (iii) Table O-8 and Figure O-35 show minimum dimensions for straight flanges that are an integral part of wheel sleeves which are frequently used on precision grinding machines. (1) Inspection. (iii) Portable units shall be used only in areas where good, general room ventilation is provided. Installed at front and back of each mill having a 46-inch roll height or over. All pressure vessels used in conjunction with power presses shall conform to the American Society of Mechanical Engineers Code for Pressure Vessels, 1968 Edition, which is incorporated by reference as specified in 1910.6. (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. (4) Pulley speeds. (2) Rivet making. Lubrication of bearings is considered the single greatest deterrent to their failure. (35) Interlocked press barrier guard means a barrier attached to the press frame and interlocked so that the press stroke cannot be started normally unless the guard itself, or its hinged or movable sections, enclose the point of operation. c. The recognized validation organization shall continue to satisfy all the requirements of this appendix and the letter of recognition during the period of recognition. 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. One or more methods of machine guarding shall be provided to protect the operator and other employees in the machine area from hazards such as those created by point of operation, ingoing nip points, rotating parts, flying chips and sparks. The manufacturer shall design a test(s) to establish the hand tool extension diameters allowed for variations in minimum object sensitivity response. (3) Type 6 straight cup wheels means wheels having diameter, thickness, hole size, rim thickness, and back thickness dimensions. (viii) Supplemental safeguarding shall be used to protect all areas of access to the point of operation which are unprotected by the PSDI presence sensing device. All projecting keys, setscrews, and other projections in revolving parts shall be removed or made flush or guarded by metal cover. c. The applicant shall provide information demonstrating that it and any validating laboratory utilized meet the program requirements set forth in section III of this appendix. The employer shall certify that the PSDI safety system has been design certified and validated, that the installation meets the operational and environmental requirements specified by the manufacturer, that the installation drawings are accurate, and that the installation meets the requirements of 29 CFR 1910.217 (a) through (h) and this appendix A. (3) Sprockets and chains. 2. If the safeguard is not described in this section, give a complete description. Machinery shall be oiled when not in motion, wherever possible. (3) Bolster plate means the plate attached to the top of the bed of the press having drilled holes or T-slots for attaching the lower die or die shoe. Suitable reinforcement shall be provided for the ceiling rafters or overhead floor beams, where such is necessary, to sustain safely the weight and stress likely to be imposed by the guard. ), (4) Cylindrical grinders. The Office of the Federal Register publishes documents on behalf of Federal agencies but does not have any authority over their programs. 1910.509Incorporation by reference. (ii) The control system shall incorporate a means of dynamically monitoring for decoupling of the rotary position indicating mechanism drive from the crankshaft. A summary of part level content is listed below followed by the table of contents, where you can drill down further. Acceptance and field inspection. information or personal data. Appendix C to Subpart L of Part 1910Fire Protection References For Further Information This content is from the eCFR and is authoritative but unofficial.

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