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Side grinding wheel having a diameter, thickness and hole with one side straight or flat and the opposite side recessed. The guard shall be fastened to the frame carrying the rolls so as to remain in adjustment for any thickness of stock. 1910.37 Maintenance, safeguards, and operational features for exit routes. Wall thickness at the back is normally greater than at the grinding face (W). The hazard created by a guide post (when it is located in the immediate vicinity of the operator) when separated from its bushing by more than one-fourth inch shall be considered as a point of operation hazard and be protected in accordance with paragraph (c) of this section. Other material, designs or dimensions affording equal or superior protection are also acceptable. 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. The adjustments shall be made before performing the stopping time measurements required by paragraphs (h)(2)(ii), (h)(5)(iii), and (h)(9)(v) of this section. (iv) Air counterbalance cylinders shall have adequate capability to hold the slide and its attachments at any point in stroke, without brake applied. b. Employees are required to cover and protect long hair to prevent it from getting caught in machine parts such as belts, chain and rotating parts. Tail rods or extension piston rods shall be guarded in accordance with paragraphs (m) and (o) of this section, or by a guardrail on sides and end, with a clearance of not less than fifteen (15) nor more than twenty (20) inches when rod is fully extended. 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. 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. 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. (v) The hinged or movable sections of an interlocked press barrier guard shall not be used for manual feeding. Each manufacturer supplying parts, components, subsystems, and assemblies needs to maintain the quality of the product, and each employer needs to maintain the system in a non-degraded condition. If the deficiencies are not corrected, OSHA may revoke recognition, effective in 60 days, unless the validation organization requests a hearing within that time. Sections 1910.217 and 1910.219 also issued under 5 U.S.C. (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. 2. (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. ), (5) Surface grinders and cutting-off machines. A recognized validation organization may change a test method of the PSDI safety system certification/validation program by notifying the Assistant Secretary of the change, certifying that the revised method will be at least as effective as the prior method, and providing the supporting data upon which its conclusions are based. (iii) Special handtools for placing and removing material shall be such as to permit easy handling of material without the operator placing a hand in the danger zone. (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 requirement in paragrpah (h)(2)(iii) reduces the possibility of significantly increased stopping time if a spring breaks. (o) Profile and swing-head lathes and wood heel turning machine. All new mill installations shall be installed so that the top of the operating rolls is not less than 50 inches above the level on which the operator stands, irrespective of the size of the mill. Preliminary approval. 1910.216 Mills and calenders in the rubber and plastics industries. (59) Control system means sensors, manual input and mode selection elements, interlocking and decision-making circuitry, and output elements to the press operating mechanism. (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. (4) Pulley speeds. The identified parts, components and subsystems shall be certified by the manufacturer to be able to withstand the functional and operational environments of the PSDI safety system. 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. 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. (11) Safety system certification/validation. 1 CFR 1.1 (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. (iii) Types 16, 17, 18, 18R, and 19 cones, plugs, and threaded hole pot balls where the work offers protection. (C) Maintain a certification record of each inspection, and each maintenance and repair task performed, under the general component of the inspection program that includes the date of the inspection, maintenance, or repair work, the signature of the person who performed the inspection, maintenance, or repair work, and the serial number, or other identifier, of the power press inspected, maintained, and repaired. (1) Each circular resaw shall be guarded by a hood or shield of metal above the saw. Validation for Design Certification/Validation. Paragraph (f)(1) of this section does not apply to hand-operated gears used only to adjust machine parts and which do not continue to move after hand power is removed. (38) Hand feeding tool means any hand held tool designed for placing or removing material or parts to be processed within or from the point of operation. (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. Comments or questions about document content can not be answered by OFR staff. 7, 1996]. (1) Minimum requirements. (iv) If pedal counterweights are provided, the path of the travel of the weight shall be enclosed. Shafting under bench machines shall be enclosed by a stationary casing, or by a trough at sides and top or sides and bottom, as location requires. (ii) The vertical clearance in passageways between the floor and power transmission beams, ceiling, or any other objects, is not less than five feet six inches (5 ft. 6 in.). (iii) The pedal return spring(s) shall be of the compression type, operating on a rod or guided within a hole or tube, or designed to prevent interleaving of spring coils in event of breakage. (iii) Means shall be provided for disconnecting the power to the machine and for locking out or rendering cycling controls inoperable. The spreader shall be made of hard tempered steel, or its equivalent, and shall be thinner than the saw kerf. Where both runs of horizontal belts are seven (7) feet or less from the floor level, the guard shall extend to at least fifteen (15) inches above the belt or to a standard height except that where both runs of a horizontal belt are 42 inches or less from the floor, the belt shall be fully enclosed in accordance with paragraphs (m) and (o) of this section. When flywheel extends into pit or is within 12 inches of floor, a standard toeboard shall also be provided; (iii) When the upper rim of flywheel protrudes through a working floor, it shall be entirely enclosed or surrounded by a guardrail and toeboard. 1910.161 Fixed extinguishing systems, dry chemical. (d) Design, construction, setting and feeding of dies -. (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. (1) Belts include all power transmission belts, such as flat belts, round belts, V-belts, etc., unless otherwise specified. This document is not intended to be totally inclusive but rather to highlight the information and requirements in the complete OSHA standard that all owners and (8) Concurrent means acting in conjunction, and is used to describe a situation wherein two or more controls exist in an operated condition at the same time. (i) Cutting-off wheels, Types 1 and 27A (see paragraphs (c)(1) (ii) and (iii) of this section). A correlation of the brake and/or clutch degradation based on the above tests and/or estimates shall be made and documented. (i) The cone belt and pulley shall be equipped with a belt shifter so constructed as to adequately guard the nip point of the belt and pulley. 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. (4) Type 11 flaring cup wheels mean wheels having double diameter dimensions D and J, and in addition have thickness, hole size, rim and back thickness dimensions. (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. (ii) The inside diameter of the band shall not be more than 1 inch larger than the outside diameter of the wheel, and shall be mounted as nearly concentric with the wheel as practicable. Regulation 1910.178(g)(2) also mandates "adequate ventilation" in battery charging areas. 1910.268 Telecommunications. 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. (12) Guard design specifications. a. 1910.1053 Respirable crystalline silica. Type 27 wheels are manufactured with flat grinding rims permitting notching and cutting operations. (2) Brakes. (i) Each continuous line of shafting shall be secured in position against excessive endwise movement. 3. Before proposing to revoke recognition, the Agency will notify the recognized validation organization of the basis of the proposed revocation and will allow rebuttal or correction of the alleged deficiencies. If there is a valid request for a hearing pursuant to paragraph I.B.7.b. A positive-type lockout device for disconnecting the power to the shear shall be provided. 1910.24 Step bolts and manhole steps. (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. (4) Guide post hazard. This exposure shall begin at a point not less than 15 below the horizontal plane of the wheel spindle. will bring you to those results. (4) Electromagnetic interference at the same wavelengths used for the radiation sensing field, at the power line frequency fundamental and harmonics, and also from outogenous radiation due to system switching. (5) Ripping and ploughing shall be against the direction in which the saw turns. (39) Inch means an intermittent motion imparted to the slide (on machines using part revolution clutches) by momentary operation of the Inch operating means. 2. (2) At the rear ends of frames over which feed conveyors run, sprockets and chains shall be guarded at the sides by plates projecting beyond the periphery of sprockets and the ends of lugs. (xvii) Controls with internally stored programs (e.g., mechanical, electro-mechanical, or electronic) shall meet the requirements of paragraph (b)(13) of this section, and shall default to a predetermined safe condition in the event of any single failure within the system. Displaying title 29, up to date as of 3/02/2023. (a) When used in press operations requiring more than one operator, separate two hand controls shall be provided for each operator, and shall be designed to require concurrent application of all operators' controls to activate the slide. (v) The safety distance (Ds) from the sensing field of the presence sensing device to the point of operation shall be greater than or equal to the distance determined by the formula: Hs = Hand speed constant of 63 inches per second (1.6 m/s). 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. In engine rooms a guardrail, preferably with toeboard, may be used instead of the guard required by paragraph (k)(1) of this section, provided such a room is occupied only by engine room attendants. 3. Safety Standard for Guarding of Machinery and Mechanical Power Transmission Apparatus. You can 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. The employer shall operate his presses within the tonnage and attachment weight ratings specified by the manufacturer. b. The explanation and use of the scale shall be documented. (6) Emphasis is placed upon the importance of maintaining cleanliness around woodworking machinery, particularly as regards the effective functioning of guards and the prevention of fire hazards in switch enclosures, bearings, and motors. It is free of direct influence or control by manufacturers, suppliers, vendors, representatives of employers and employees, and employer or employee organizations; and. EN 618:2002+A1:2010, Continuous handling equipment and systems - Safety and EMC requirements for equipment for mechanical handling of bulk materials except fixed belt conveyors EN 619:2002+A1:2010, Continuous handling equipment and systems - Safety and EMC requirements for equipment for mechanical handling of unit loads and fell backwards and hit my head on the frame of the conveyor . [39 FR 23502, June 27, 1974, as amended at 43 FR 49750, Oct. 24, 1978; 49 FR 5323, Feb. 10, 1984]. Dimensions of such flanges shall never be less than indicated. 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. The following terms and conditions shall be part of every recognition: a. (23) Die shoe means a plate or block upon which a die holder is mounted. They shall be of rigid construction and designed to be adjustable to compensate for wheel wear. It is recommended that old installations be changed to conform to this rule. Minimum requirements. The adjustment shall be done under the supervision of an authorized person whose qualifications include knowledge of safety distance requirements and experience with the brake system and its adjustment. 2. (ii) Two-hand trip systems on full revolution clutch machines shall incorporate an antirepeat feature. In every case the sides of trough shall extend at least two (2) inches beyond the shafting or protuberance. It should also be noted that organic bonded wheels do not emit the same clear metallic ring as do vitrified and silicate wheels. Integrated test of the press fully equipped to operate in the PSDI mode shall be conducted to establish the total system reaction time. (iii) If two-hand trip systems are used on multiple operator presses, each operator shall have a separate set of controls. 1910.18 Changes in established Federal standards. It would not be necessary to repeat the tests on individual safety systems of the same manufacture or design. (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. 12 or .262 diameter in inches r.p.m. If you have questions for the Agency that issued the current document please contact the agency directly. When refacing or truing, care shall be exercised to make sure that proper relief and rigidity is maintained as specified in paragraphs (c) (2) and (5) of this section and they shall be replaced when they do not conform to these subparagraphs and Table O-4, Figure O-30, Table O-5, Figure O-31, Table O-6, Figure O-32, and Table O-8, Figure O-35. Appendix B to Subpart L of Part 1910National Consensus Standards Therefore, the wall dimension W takes precedence over the diameter of the recess as an essential intermediate dimension to describe this shape type. Mines. (The operational and installation requirements of the PSDI safety system may vary for different applications.). Momentary operation of the stop control shall immediately deactivate the clutch and apply the brake. (5) Excluded machinery. flat belts two (2) inches or less in width which are free from metal lacings or fasteners. (3) Each hand-fed jointer with a horizontal cutting head shall have an automatic guard which will cover all the section of the head on the working side of the fence or gage. (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. (7) Environmental requirements. learn more about the process here. (2) Veneer clippers shall have automatic feed or shall be provided with a guard which will make it impossible to place a finger or fingers under the knife while feeding or removing the stock.