Conveyor systems shall be equipped with an audible warning signal to be sounded immediately before starting up the conveyor. Compliance with 1910.217(h)(5)(iii) and (h)(9)(v). (1) Antirepeat means the part of the clutch/brake control system designed to limit the press to a single stroke if the tripping means is held operated. (viii) The control system shall incorporate an automatic means to prevent initiation or continued operation in the PSDI mode unless the press drive motor is energized in the forward direction of crankshaft rotation. When brake wear or other factors extend press stopping time beyond the limit permitted by the brake monitor, adjustment, repair, or maintenance shall be performed on the brake or other press system element that extends the stopping time. Pulleys serving as balance wheels (e.g., punch presses) on which the point of contact between belt and pulley is more than six feet six inches (6 ft. 6 in.) (4) Belt sanding machines shall be provided with guards at each nip point where the sanding belt runs on to a pulley. (b) The device may not be used as a tripping means to initiate slide motion, except when used in total conformance with paragraph (h) of this section. 1910.264 Laundry machinery and operations. (7) Nip-point belt and pulley guard means a device which encloses the pulley and is provided with rounded or rolled edge slots through which the belt passes. The validation organization or the validating laboratory shall own a registered certification/validation mark or logo. Standard conditions shall be secured by the use of the following materials. (5) Forging presses mean a class of forging equipment wherein the shaping of metal between dies is performed by mechanical or hydraulic pressure, and usually is accomplished with a single workstroke of the press for each die station. Wherever flywheels are above working areas, guards shall be installed having sufficient strength to hold the weight of the flywheel in the event of a shaft or wheel mounting failure. Where guard is exposed to contact with moving equipment, additional strength may be necessary. 1910.219 Mechanical power-transmission apparatus. The tripwire cable or wire center cord shall operate readily whether cable or cord is pushed or pulled. (8) Point of operation means that point at which cutting, shaping, or forming is accomplished upon the stock and shall include such other points as may offer a hazard to the operator in inserting or manipulating the stock in the operation of the machine. 1910.219 (a) (1) This section covers all types and shapes of power-transmission belts, except the following when operating at two hundred and fifty (250) feet per minute or less: 1910.219 (a) (1) (i) Flat belts one (1) inch or less in width, 1910.219 (a) (1) (ii) By a standard guard as described in paragraph (o) of this section, at least seven (7) feet high extending six (6) inches above the mesh point of the gears; or. Lubrication of bearings is considered the single greatest deterrent to their failure. 1910.1012 Ethyleneimine. Bearings and facilities for oiling. (2) The opening in the table shall be kept as small as possible. (3) Training of maintenance personnel. 1910.424 SCUBA diving. Object sensitivity describes the capability of a presence sensing device to detect an object in the sensing field, expressed as the linear measurement of the smallest interruption which can be detected at any point in the field. (See Figure O-24-A.). 1910.36 Design and construction requirements for exit routes. (i) Diamond wheels, except certain vitrified diamond wheels. (11) Safety system certification/validation. 1910.183 Helicopters. All Conveyors - Safety Section Refer to OSHA 1910.132 (Personal Prot. (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. (4) Openings for oiling. 1910.94 Ventilation. Steam hammers shall be provided with a means of cylinder draining, such as a self-draining arrangement or a quick-acting drain cock. (2) Each radial saw used for ripping shall be provided with nonkickback fingers or dogs located on both sides of the saw so as to oppose the thrust or tendency of the saw to pick up the material or to throw it back toward the operator. (See Figures O-8 and O-9. will also bring you to search results. 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. (1) The feed rolls of roll type glue spreaders shall be guarded by a semicylindrical guard. (4) Guide post hazard. [Reserved] All drip cups and pans shall be securely fastened. (i) Mechanical power presses used in the PSDI mode shall be operated under the control of a safety system which, in addition to meeting the applicable requirements of paragraphs (b)(13) and (c)(5) and other applicable provisions of this section, shall function such that a single failure or single operating error shall not cause injury to personnel from point of operation hazards. The validation organization and validating laboratory shall have adequate administrative and technical staffs to conduct the validation of the certification of PSDI safety systems. All points not readily accessible shall have oil feed tubes if lubricant is to be added while machinery is in motion. The requirements of paragraph (f)(1) of this section shall also apply to hot trimming presses. (pounds per square inch) or greater. (1) Use of lead. A minimum object sensitivity of one and one-fourth inches (31.75 mm) means that a one and one-fourth inch (31.75 mm) diameter object will be continuously detected at all locations in the sensing field. Regulation 1910.178(g)(2) also mandates "adequate ventilation" in battery charging areas. It shall be the responsibility of any person modifying a power press to furnish instructions with the modification to establish new or changed guidelines for use and care of the power press so modified. tensile strength 20,000 p.s.i.) (4) Inverted swing cutoff saws shall be provided with a hood that will cover the part of the saw that protrudes above the top of the table or above the material being cut. For the purpose of demonstrating compliance with the reaction time required by 1910.217(h), the tests shall use the following definitions and requirements: a. All manually operated valves and switches shall be clearly identified and readily accessible. The regular oilers shall wear tight-fitting clothing. (10) Air controlling equipment. Guards shall be affixed to the machine where possible and secured elsewhere if for any reason attachment to the machine is not possible. (x) All components and subsystems of the control system shall be designed to operate together to provide total control system compliance with the requirements of this section. The bottom of the guard shall come to within three-eighths inch of a plane formed by bottom or contact face of the feed roll where it touches the stock. (i) Air valve and air pressure supply/control. (66) Certification/validation and certify/validate means the combined process of certification and validation. (i) Prior to the initial use of any mechanical press in the PSDI mode, two sets of certification and validation are required: (A) The design of the safety system required for the use of a press in the PSDI mode shall be certified and validated prior to installation. 1910.66 Powered platforms for building maintenance. The manufacturer shall evaluate and certify, and the OSHA-recognized third-party validation organization shall validate, the design and operation of the safety system by determining conformance with the following: a. b. (A) Where presses that have slide counterbalance systems are used in the PSDI mode, the counterbalance system shall also meet the requirements of paragraph (b)(9) of this section. 1910.242 Hand and portable powered tools and equipment, general. 1910.145 Specifications for accident prevention signs and tags. Hand feeding tools are intended for placing and removing materials in and from the press. 1910.161 Fixed extinguishing systems, dry chemical. The maximum angular exposure of the grinding wheel periphery and sides for safety guards used on cylindrical grinding machines shall not exceed 180. It shall be made of material that is soft enough so that it will be unlikely to cause tooth breakage. (2) Calenders. (2) Each swing cutoff saw shall be provided with an effective device to return the saw automatically to the back of the table when released at any point of its travel. The emphasis is on an integrated total system including all elements affecting point of operation safety. Conduct or recertification/revalidation. means the distance in feet any one abrasive grain on the peripheral surface of a grinding wheel travels in 1 minute. Each reaction time required to calculate the Safety Distance, including the brake monitor setting, shall be documented in separate reaction time tests. If the safeguard is not described in this section, give a complete description. Grinding machines shall be equipped with flanges in accordance with paragraph (c) of this section. (c) As used in 1910.216, unless the context clearly requires otherwise, the following mills and calenders in the rubber and plastic industries terms shall have the meanings prescribed in this paragraph. The certifications are made to the validation organization. The control system shall require that each sensing field be interrupted the selected number of times prior to initiating a stroke. (4) of this appendix. 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. 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. (36) Adjustable barrier guard means a barrier requiring adjustment for each job or die setup. (9) Continuous means uninterrupted multiple strokes of the slide without intervening stops (or other clutch control action) at the end of individual strokes. The adaptor nut which is less than the minimum one-third diameter of wheel fits in the depressed side of wheel to prevent interference in side grinding and serves to drive the wheel by its clamping force against the depressed portion of the back flange. (h) Presence sensing device initiation (PSDI) -. The failure shall be indicated by the system. For installation certification/validation and annual recertification/revalidation, in the first stage the employer certifies or recertifies that the employer is installing or utilizing a PSDI safety system validated as meeting the design requirements of 29 CFR 1910.217 (a) through (h) and this appendix A by an OSHA-recognized third-party validation organization and that the installation, operation and maintenance meet the requirements of 29 CFR 1910.217 (a) through (h) and this appendix A. Hangers. Prior to conducting the brake system test required by paragraph (h)(2)(ii), a visual check shall be made of the springs. This table technically only applies to mechanical power presses operated within OSHA's jurisdiction, although some industry consensus standards also reference this table, such as ANSI B65.1 . (1) Each planing, molding, sticking, and matching machine shall have all cutting heads, and saws if used, covered by a metal guard. 1910.97 Nonionizing radiation. (i) Cutting-off wheels, Types 1 and 27A (see paragraphs (c)(1) (ii) and (iii) of this section). The requirements for OSHA recognition of a third-party validation organization for the PSDI standard are that the program has fulfilled the requirements of section II of this appendix for qualifications and of section III of this appendix for program requirements, and the program has identified appropriate test and analysis methods to meet the requirements of the PSDI standard and appendix A. The guard shall be constructed of heavy material, preferably metal, and firmly secured to the frame carrying the rolls so as to remain in adjustment for any thickness of stock. The mark or logo shall be suitable for incorporation into the label required by paragraph (h)(11)(iii) of this section. 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. (a)(1) OSHA Basics: OSHA's Special Industry Standards in Subpart R (1) Veneer slicer knives shall be guarded to prevent accidental contact with knife edge, at both front and rear. Only part revolution type mechanical power presses are approved for PSDI. Acceptance and field inspection. Stopping distances shall be expressed in inches of surface travel of the roll from the instant the emergency stopping device is actuated. (iv) Type of safeguard(s) being used (two hand control, two hand trip, pullouts, sweeps, or other). See paragraph (c)(3)(ii) of this section regarding manual feeding through interlocked press barrier devices. The third-party validation organization, annually or after a change specified in paragraph 1., shall validate the employer's certification that the requirements of paragraph B., Installation Certification/Validation have been met. This book includes the complete Part 1910 - General Industry, Part 1903 - Inspections, Citations and Proposed Penalties, 1904 - Recording and Reporting Occupational Injuries and Illnesses regulations, and Part 1928 - Occupational . (i) Wood guards may be used in the woodworking and chemical industries, in industries where the presence of fumes or where manufacturing conditions would cause the rapid deterioration of metal guards; also in construction work and in locations outdoors where extreme cold or extreme heat make metal guards and railings undesirable. Die-setting and maintenance procedures shall comply with paragraphs (a) through (g) of this section, and shall not be done in the PSDI mode. (v) Tongs shall be of sufficient length to clear the body of the worker in case of kickback, and shall not have sharp handle ends. 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. (iii) Toeboards shall be four (4) inches or more in height, of wood, metal, or of metal grill not exceeding one (1) inch mesh. Where the operator feeds or removes parts by placing one or both hands in the point of operation, and a two hand control, presence sensing device, Type B gate or movable barrier (on a part revolution clutch) is used for safeguarding: (i) The employer shall use a control system and a brake monitor which comply with paragraphs (b) (13) and (14) of this section; (ii) The exception in paragraph (b)(7)(v)(d) of this section for two hand controls manufactured and installed before August 31, 1971 is not applicable under this paragraph (c)(5); (iii) The control of air clutch machines shall be designed to prevent a significant increase in the normal stopping time due to a failure within the operating valve mechanism, and to inhibit further operation if such failure does occur, where a part revolution clutch is employed. (iii) The band shall be of sufficient width and its position kept so adjusted that at no time will the wheel protrude beyond the edge of the band a distance greater than that indicated in Figure O-29 and in Table O-2 or the wall thickness (W), whichever is smaller. (2) Guard design. (13) Control reliability. (2) Safety trip, side. The application, supporting documents, staff recommendation, statement of applicant's reasons, and any comments received, will be available for public inspection in the OSHA Docket Office. http://www.osha.gov/pls/oshaweb/mechanical.html. (b) The performance of combined subsystems meets OSHA's operational requirements. (9) Push sticks or push blocks shall be provided at the work place in the several sizes and types suitable for the work to be done. (i) Point of operation devices shall protect the operator by: (a) Preventing and/or stopping normal stroking of the press if the operator's hands are inadvertently placed in the point of operation; or, (b) Preventing the operator from inadvertently reaching into the point of operation, or withdrawing his hands if they are inadvertently located in the point of operation, as the dies close; or, (c) Preventing the operator from inadvertently reaching into the point of operation at all times; or, (e) Requiring application of both of the operator's hands to machine operating controls and locating such controls at such a safety distance from the point of operation that the slide completes the downward travel or stops before the operator can reach into the point of operation with his hands; or, (f) Enclosing the point of operation before a press stroke can be initiated, and maintaining this closed condition until the motion of the slide had ceased; or. Vertical belts running over a lower pulley more than seven (7) feet above floor or platform shall be guarded at the bottom in the same manner as horizontal overhead belts, if conditions are as stated in paragraphs (e)(2)(ii) (a) and (c) of this section. Where belt shifters are not directly located over a machine or bench, the handles shall be cut off six feet six inches (6 ft. 6 in.) The records shall include the manufacture and model number of each component and subsystem, the calculations of the safety distance as required by paragraph (h)(9)(v) of this section, and the stopping time measurements required by paragraph (h)(2)(ii) of this section. 1910.1005 [Reserved] This exposure shall begin at a point not less than 15 below the horizontal plane of the wheel spindle. Sec. Eligibility. In no case shall a warning device of leather or other material attached to the spindle be acceptable. (v) The employer shall notify the OSHA-recognized third-party validation organization within five days whenever a component or a subsystem of the safety system fails or modifications are made which may affect the safety of the system. The Occupational Safety and Health Administration's (OSHA's) requirements for machine guarding are found in 29 Code of Federal Regulations (CFR) 1910 Subpart O, Machinery and Machine Guarding as detailed below; 1910.211 Definitions; 1910.212 General requirements for all machines; . 1910.402 Definitions. (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. The model is based on medical research into the forces needed to cause damage to . (vi) The adjustable barrier guard shall be securely attached to the press bed, bolster plate, or die shoe, and shall be adjusted and operated in conformity with Table O-10 and the requirements of this subparagraph.