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Appendix D to Subpart I of Part 1910Test Methods and Procedures for Personal Fall Protection Systems Non-Mandatory Guidelines. (2) Open framehammers (or blacksmith hammers) mean hammers used primarily for the shaping of forgings by means of impact with flat dies. The timer shall be manually adjustable, to a maximum time of 30 seconds. If the validation organization has been recognized for more than one year, meets the requirements for expansion of recognition, and there is no evidence that the recognized validation organization has not been following the requirements of this appendix and the letter of recognition, an expansion will normally be granted. (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. OSHA intends that PSDI continue to be prohibited where present state-of-the-art technology will not allow it to be done safely. Pulleys with cracks, or pieces broken out of rims, shall not be used. OSHA General Industry Machinery and Machine Guarding 1910 - ISHN On the completion of such operations, the spreader shall be immediately replaced. 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. (5) Additional requirements for safe-guarding. Compliance with 1910.217(h)(5)(iii) and (h)(9)(v). citations and headings They shall be made of steel or other material with adequate strength and shall enclose the wheel sides upward from the back for one-third of the wheel thickness. (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. (v) The PSDI mode of operation shall be used only for normal production operations. (ix) Diamond wheels, except certain vitrified diamond wheels. 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. (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. Collars. Inch is a function used by the die setter for setup of dies and tooling, but is not intended for use during production operations by the operator. (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. When the bearing surfaces become worn, warped, sprung, or damaged they should be trued or refaced. Side grinding wheel having a wall flared or tapered outward from the back. The certifications are made to the validation organization. 2 For wheels under 114 inch thick F dimension shall not exceed 40 percent of wheel thickness. (17) Two hand control device means a two hand trip that further requires concurrent pressure from both hands of the operator during a substantial part of the die-closing portion of the stroke of the press. (3) Belt perches. (46) Press means a mechanically powered machine that shears, punches, forms or assembles metal or other material by means of cutting, shaping, or combination dies attached to slides. (e) Trip and emergency switches. 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. Where panels are fitted with expanded metal or wire mesh the middle rails may be omitted. 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. (vii) Controls for more than one operating station shall be designed to be activated and deactivated in complete sets of two operator's hand controls per operating station by means capable of being supervised by the employer. You can The validation organization or validating laboratory shall have a follow-up system for inspecting or testing manufacturer's production of design certified/validated PSDI safety system components and subassemblies where deemed appropriate by the validation organization. The brake monitor used with the Type B gate or movable barrier device shall be installed in a manner to detect slide top-stop overrun beyond the normal limit reasonably established by the employer. The safety factor and/or derated percentage shall be specifically noted and complied with. (ii) In powerplants or power-development rooms, a guardrail may be used in lieu of the guard required by subdivision (i) of this subparagraph. (iv) The ram shall be blocked when dies are being changed or other work is being done on the hammer. It should also be noted that organic bonded wheels do not emit the same clear metallic ring as do vitrified and silicate wheels. (ii) The relevant requirements of paragraphs (a) through (g) of this section also shall apply to all presses used in the PSDI mode of operation, whether or not cross referenced in this paragraph (h). The total system design shall be certified by the manufacturer as complying with all requirements in 29 CFR 1910.217 (a) through (h) and this appendix A. This appendix provides employers, manufacturers, and their representatives, with nonmandatory guidelines for use in developing certification documents. This table shows the distances that guards shall be positioned from the danger line in accordance with the required openings. Overhead belt guards shall be at least one-quarter wider than belt which they protect, except that this clearance need not in any case exceed six (6) inches on each side. (E) A system or visual check shall be made to verify correct counterbalance adjustment for die weight according to the press manufacturer's instructions, when a press is equipped with a slide counterbalance system. OSHA has two standards specific to conveyors, its 1910 standard applying to general industry. (4) Flywheels and bearings. (vi) The presence sensing device location shall either be set at each tool change and set-up to provide at least the minimum safety distance, or fixed in location to provide a safety distance greater than or equal to the minimum safety distance for all tooling set-ups which are to be used on that press. (ii) If the single-stroke mechanism is dependent upon spring action, the spring(s) shall be of the compression type, operating on a rod or guided within a hole or tube, and designed to prevent interleaving of the spring coils in event of breakage. The eCFR is displayed with paragraphs split and indented to follow 1 The recommendations listed in the above table are guides for the conditions stated. 1910.304 Wiring design and protection. 3. (ii) The employer shall certify that employees have been trained by preparing a certification record which includes the identity of the person trained, the signature of the employer or the person who conducted the training, and the date the training was completed. (ii) If the belt is of the endless type or laced with rawhide laces, and a belt shifter is not desired, the belt will be considered guarded if the nip point of the belt and pulley is protected by a nip point guard located in front of the cone extending at least to the top of the largest step of the cone, and formed to show the contour of the cone in order to give the nip point of the belt and pulley the maximum protection. round belts one-half (12) inch or less in diameter; and. [39 FR 23502, June 27, 1974, as amended at 43 FR 49750, Oct. 24, 1978; 43 FR 51760; Nov. 7, 1978; 49 FR 5323, Feb. 10, 1984; 61 FR 9227, March 7, 1996; 69 FR 31882, June 8, 2004], Occupational Safety & Health Administration. Pulleys with cracks, or pieces broken out of rims, shall not be used. If center to center distance between pulleys is ten (10) feet or more. Records of inspections and maintenance shall be kept in accordance with paragraph (e) of this section. (8) Hinged saw tables shall be so constructed that the table can be firmly secured in any position and in true alignment with the saw. (i) Suspended counterbalanced tighteners and all parts thereof shall be of substantial construction and securely fastened; the bearings shall be securely capped. tensile strength 20,000 p.s.i.) 1910.17 Effective dates. In all other industries, wood guards shall not be used. Maximum hole size for all other applications should not exceed one-half wheel diameter. 1910.141 Sanitation. Limitation: Minimum back thickness, E dimension, should not be less than one-fourth T dimension. (b) Each two hand trip shall meet the construction requirements of paragraph (b)(6) of this section. They shall be continuous, the ends being either riveted, bolted, or welded together in such a manner as to leave the inside free from projections. (3) Sprockets and chains. Necessary maintenance or repair or both shall be performed and completed before the press is operated. 1. ), (4) Cylindrical grinders. (1) General requirements. ), (9) Exposure adjustment. Pulleys, any parts of which are seven (7) feet or less from the floor or working platform, shall be guarded in accordance with the standards specified in paragraphs (m) and (o) of this section. (3) Manually operated controls. (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. 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 . Title 29 was last amended 2/24/2023. (1) Hazards to personnel associated with broken or falling machine components. (d) Two hand trips shall be fixed in position so that only a supervisor or safety engineer is capable of relocating the controls. 1. 1910.333 Selection and use of work practices. California Code of Regulations, Title 8, Section 3999. Conveyors. 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. 1910.7 Definition and requirements for a nationally recognized testing laboratory. Suspended counterbalanced tighteners and all parts thereof shall be of substantial construction and securely fastened; the bearings shall be securely capped. (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. Minimum object sensitivity describes the largest acceptable size of the interruption in the sensing field. The recognition of any validation organization will be evidenced by a letter of recognition from OSHA. 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. (vi) A holdout or a restraint device shall protect the operator as specified in paragraph (c)(3)(i)(c) of this section and shall include attachments for each of the operator's hands. (12) Guard design specifications. (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. (b) Portable wheels with threaded inserts or projecting studs. a. (iii) Cast steel, or structural steel, safety guards as specified in Figures O-36 and O-37 and Table O-9 shall be used where operating speeds of wheels are faster than 8,000 surface feet per minute up to a maximum of 16,000 surface feet per minute. 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. (5) Ripping and ploughing shall be against the direction in which the saw turns. Where the upper and lower runs of horizontal belts are so located that passage of persons between them would be possible, the passage shall be either: Completely barred by a guardrail or other barrier in accordance with paragraphs (m) and (o) of this section; or. 1910.241 Definitions. Broken pulleys. Ts = Longest press stopping time, in seconds, computed by taking averages of multiple measurements at each of three positions (45 degrees, 60 degrees, and 90 degrees) of crankshaft angular position; the longest of the three averages is the stopping time to use. 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. The guard shall have openings no larger than one-half (12) inch. 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.