Cup wheels (Types 6 and 11) shall be protected by: (i) Safety guards as specified in paragraphs (b) (1) through (10) of this section; (ii) Band type guards as specified in paragraph (b)(11) of this section; and. Blanking of the sensing field is not permitted. Antirepeat requires release of all tripping mechanisms before another stroke can be initiated. (b) Mechanical power press guarding and construction, general -. Where tools are used for feeding, removal of scrap, lubrication of parts, or removal of parts that stick on the die in PSDI operations: (A) The minimum diameter of the tool handle extension shall be greater than the minimum object sensitivity of the presence sensing device(s) used to initiate press strokes; or. (1) Cup wheels. Mounts which are affixed to the wheel by the manufacturer shall not be reused. Work rests shall be kept adjusted closely to the wheel with a maximum opening of one-eighth inch to prevent the work from being jammed between the wheel and the rest, which may cause wheel breakage. a. Personal protective equipment shall be used in grinding operations, and equipment shall be used and maintained in accordance with ANSI B7.1-1970, Safety Code for the Use, Care, and Protection of Abrasive Wheels, which is incorporated by reference as specified in 1910.6, and with 1910.215. The tripwire cable or wire center cord shall operate readily whether cable or cord is pushed or pulled. Blotters need not be used with the following types of wheels: (ii) Abrasive discs (inserted nut, inserted washer, and projecting-stud type). Expanded metal, perforated or solid sheet metal, wire mesh on a frame of angle iron, or iron pipe securely fastened to floor or to frame of machine. 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. (i) Presses with flexible steel band brakes or with mechanical linkage actuated brakes or clutches shall not be used in the PSDI mode. 1910.217 Mechanical power presses. By a band guard covering the face of gear and having flanges extended inward beyond the root of the teeth on the exposed side or sides. 1910.144 Safety color code for marking physical hazards. b. a. (v) When any check of the press, including those performed in accordance with the requirements of paragraphs (h)(10)(ii), (iii) or (iv) of this section, reveals a condition of noncompliance, improper adjustment, or failure, the press shall not be operated until the condition has been corrected by adjustment, replacement, or repair. b. (1) General. (iii) The brake monitor setting shall allow an increase of no more than 10 percent of the longest stopping time for the press, or 10 milliseconds, whichever is longer, measured at the top of the stroke. The third-party validation organization shall validate the manufacturer's certification under paragraphs 2 and 3. 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. Machine components shall be designed, secured, or covered to minimize hazards caused by breakage, or loosening and falling or release of mechanical energy (i.e. Such tools shall not be in lieu of other guarding required by this section, but can only be used to supplement protection provided. OSHA may inspect the facilities of the third-party validation organization and any validating laboratory, and while there shall review any additional documentation underlying the application. Forging hammers, counterblow equipment and high-energy-rate forging machines impart impact to the workpiece, while most other types of forging equipment impart squeeze pressure in shaping the stock. (iii) Paragraph (e)(1)(ii) of this section does not apply to presses that comply with paragraphs (b)(13) and (14) of this section. Each continuous line of shafting shall be secured in position against excessive endwise movement. A copy of the certification/validation report shall be submitted to OSHA within 30 days of its completion. f. The applicant shall certify that the information submitted is accurate. In 2015 it again made list, coming in at number ten. 4. Have unit wired by qualified electrician. Acceptable design features shall demonstrate, in the following order or precedence, that: (1) No single failure points may cause injury; or. (1) Guarding. (See Figures O-16 and O-17. The certification/validation process includes two stages. Regulation Y 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: The intensity of illumination conforms to the requirements of ANSI A11.1-1965 (R-1970), which is incorporated by reference as specified in 1910.6. (61) Presence sensing device initiation means an operating mode of indirect manual initiation of a single stroke by a presence sensing device when it senses that work motions of the operator, related to feeding and/or removing parts, are completed and all parts of the operator's body or hand tools are safely clear of the point of operation. Where a calender 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 calender, safety control devices listed in paragraph (c) of this section shall not apply. (See Figures O-18, O-19, O-20, O-21, O-22, and O-23.). Flexible steel band brakes do not possess a long-term reliability against structural failure as compared to other types of brakes, and therefore are not acceptable on presses used in the PSDI mode of operation. (v) The employer shall provide brushes, swabs, lubricating rolls, and automatic or manual pressure guns so that operators and diesetters shall not be required to reach into the point of operation or other hazard areas to lubricate material, punches or dies. This subparagraph does not apply to keys or setscrews within gear or sprocket casings or other enclosures, nor to keys, setscrews, or oilcups in hubs of pulleys less than twenty (20) inches in diameter where they are within the plane of the rim of the pulley. 1910.1052 Methylene chloride. An alternative manual cycle initiation and control means shall be supplied for use in die setting which meets the requirements of paragraph (b)(7) of this section. 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. (ii) All presses shall be installed in such a manner that they remain where they are positioned or they are anchored to foundations sufficient to support them according to applicable engineering standards. 2. (10) Material requirements and minimum dimensions. The midrail may be one by four (1 4) inches or more. It shall be the responsibility of any person reconstructing, or modifying a mechanical power press to do so in accordance with paragraph (b) of this section. An open space, not exceeding four (4) inches in width, may be left between the outside edge of the disk and the rim of the wheel if desired, to facilitate turning the wheel over. (e) Trip and emergency switches. (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. Ample room for cleaning machines, handling material, work pieces, and scrap shall also be provided. (i) Blotters (compressible washers) shall always be used between flanges and abrasive wheel surfaces to insure uniform distribution of flange pressure. 3. (v) All clutch/brake control electrical circuits shall be protected against the possibility of an accidental ground in the control circuit causing false operation of the press. 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. The failure of a critical component shall necessitate the removal of the safety system from service until it is recertified and revalidated, except recertification by the employer without revalidation is permitted when a non-critical component or subsystem is replaced by one of the same manufacture and design as the original, or determined by the third-party validation organization to be equivalent by similarity analysis, as set forth in appendix A. 1910.1450 Occupational exposure to hazardous chemicals in laboratories. (i) Both flanges, of any type, between which a wheel is mounted, shall be of the same diameter and have equal bearing surface. B. Analytical methods may be used in lieu of, in combination with, or in support of tests to satisfy specification requirements. (a) When used in press operations requiring more than one operator, separate two hand trips shall be provided for each operator, and shall be designed to require concurrent application of all operators' to activate the slide. (1) Belts include all power transmission belts, such as flat belts, round belts, V-belts, etc., unless otherwise specified. (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. 1910.107 Spray finishing using flammable and combustible materials. (ii) A red color stop control shall be provided with the clutch/brake control system. The Part 1910 - OSHA General Industry regulations book is designed to assist you in meeting OSHA requirements. 4. 1910.1051 1,3-Butadiene. (xv) Selection of bar operation shall be by means capable of being supervised by the employer. This section covers the principal features with which power transmission safeguards shall comply. (2) Each circular resaw (other than self-feed saws with a roller or wheel at back of the saw) shall be provided with a spreader fastened securely behind the saw. 1910.97 Nonionizing radiation. b. (ix) The control design shall preclude any movement of the slide caused by operation of power on, power off, or selector switches, or from checks for proper operations as required by paragraph (h)(6)(xiv) of this section. 1910.268 Telecommunications. There are other general safety precautions which should be followed by everyone even if they dont work directly with conveyors. (50) Single stroke mechanism means an arrangement used on a full revolution clutch to limit the travel of the slide to one complete stroke at each engagement of the clutch. A controlled clearance between the wheel hole and the machine spindle (or wheel sleeves or adaptors) is essential to avoid excessive pressure from mounting and spindle expansion. 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. Adjustments shall be made only by authorized personnel whose qualifications include a knowledge of the provisions of Table O-10 and this subparagraph. All abrasive wheels shall be mounted between flanges which shall not be less than one-third the diameter of the wheel. 1926.555 (a) (1) Means for stopping the motor or engine shall be provided at the operator's station. 1910.1003 13 Carcinogens (4-Nitrobiphenyl, etc.). Expanded metal, perforated or solid sheet metal, wire mesh on a frame of angle iron, or iron pipe securely fastened to floor or to frame of machine. (2) Where an exhaust system is used, the guards shall form part or all of the exhaust hood and shall be constructed of metal of a thickness not less than that specified in paragraph (h)(1) of this section. Navigate by entering citations or phrases (3) Broken pulleys. All power-transmission equipment shall be inspected at intervals not exceeding 60 days and be kept in good working condition at all times. Certain exceptions are forging hammers made with frame mounted on the anvil; e.g., the smaller, single-frame hammers are usually made with the anvil and frame in one piece. b. ), (4) Cylindrical grinders. Surface Feet Per Minute = 3.1416 diameter in inches r.p.m. 1910.157 Portable fire extinguishers. (2) Cutting heads on wood-turning lathes, whether rotating or not, shall be covered as completely as possible by hoods or shields. 1910.336-1910.360 [Reserved], Safety Requirements for Special Equipment, 1910.399 Definitions applicable to this subpart. (4) Mill roll heights. (v) The route followed by the oiler is protected in such manner as to prevent accident. (2) The report shall include the following information: (i) Employer's name, address and location of the workplace (establishment). (b) Abrasive discs (inserted nut, inserted washer, and projecting stud type). (The operational and installation requirements of the PSDI safety system may vary for different applications.). Tail rods or extension piston rods. (ii) Safety triprod. (3) On applications where injury to the operator might result if motors were to restart after power failures, provision shall be made to prevent machines from automatically restarting upon restoration of power. (i) Air valve and air pressure supply/control. Flywheels. (i) Spring counterbalance systems when used shall incorporate means to retain system parts in event of breakage. (xi) 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 value mechanism, and to inhibit further operation if such failure does occur. The Federal Register notice of preliminary decision will provide a period of not less than 60 calendar days for the written comments on the applicant's fulfillment of the requirements for recognition. (14) Abrasive wheel means a cutting tool consisting of abrasive grains held together by organic or inorganic bonds. (ii) Type 1 cutting-off wheels are to be mounted between properly relieved flanges which have matching bearing surfaces. (7) Power-driven guillotine veneer cutters, other than continuous trimmers, shall be provided, in addition to the brake or other stopping mechanism, with an emergency device which will prevent the machine from operating in the event of failure of the brake when the starting mechanism is in the nonstarting position. (s) Inspection and maintenance of woodworking machinery. (ii) Where speeds above 250 feet per minute as measured on the surface of the drive roll are used, stopping distances of more than 134 percent are permissible. 1. (2) Inspection and maintenance. (ix) A scale guard of substantial construction shall be provided at the back of every press, so arranged as to stop flying scale. (vi) Oil swabs, or scale removers, or other devices to remove scale shall be provided. (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. 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. A separate drafting site All revolving collars, including split collars, shall be cylindrical, and screws or bolts used in collars shall not project beyond the largest periphery of the collar.
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