ASME B107.24-204.2 Material
Materials used in the manufacturing of the pliers shall be such as to produce pliers conforming to the requirements hereinafter specified.
Pliers shall be similar to the figure to which reference is made and shall be proportioned in all parts so as to meet the requirements of this Standard. Pliers shall be provided with a toggle or cam device having an adjustable mechanism designed so that the jaws can be clamped and locked. Pliers shall be relea3ed by hand anywhere within the capacity of the pliers by any release mechanism similar to Fig. 1. Test specimens shall withstand applicable test procedures without cracking or breaking.
Handles of pliers shall be through hardened from 30 HRC to 50 HRC or case hardened from 75 HRI5N to 86 HR15N with a case depth of a minimum of 0.010 in. (0.25 mm). Handles shall be so shaped as to afford a comfortable grip and shall be free from rough edges and sharp corners. The minimum handle clearance between the fixed and moveable handle shall be as specified in the appropriate tables, whcn the pliers are locked in any position of the jaws. Outer hand-gripping surfaces of handles shall be smooth, knurled, or impressed.
Pliers joints shall have no excessive looseness, play, or any other Indications of side play of the two halves of the pliers when opened or closed that would impair the function of pliers. Joint fasteners shall be through hardened from 25 HRC to 50 IIRC. Where fasteners receive a case hardening treatment in addition to the through hardening. a maximum hardness of ) HRC or equivalent will be permitted.
4.6.1 Jaw Openings. Ends of aws shall open, when adjusted by the screw, to the respective mirdmum distance specified in Tables 4 through 8. Pliers shall operate in a smooth and uniform manner
4.6.2 Jaw Hardness. Jaws shall be through hardened from 45 HRC to 60 HRC or case hardened from 8302 pdf free download.LOCKING PLIERS.HR15N to 90 HR15N with a case depth niinimum of 0.010 in. (0.25 mm).
4.6.3 jaw Serratlon. Serrated surfaces for Classes 1,
2, and 3 shall have continuous and uniform sharp projections.
4.7 Adjusting Suew
Adjusting screw located at the end of the handle shaU have a minimum hardness of 30 HRC.
Pliers shall be marked in a plain and permanent manner with the manufacturer’s name or with a trademark of such known character that the source of manufacture and country of origin shall be readily determined. Marking shall be as permanent as the normal life expectancy of the pliers, providing the surface to which it was applied has not been subjected to a fretting or abrading action, and is capable of withstanding the cleaning normally experienced during its intended use.
4.9.1 Appearance. Surfaces shall be tested in accordance with ASME B46.1. Surfaces shall be free from pits, nodules, burrs, and other conditions that may adversely affect th performance or appearance. Ground surfaces shall have a maximum surface roughness of 2(X) p.m. (5.1 p.m) arithmetic average. Measurement of the finish shall be made with a measuring instrument using a cutoff length of 0.03 in. (0.8 mm).
4.9.2 Coating. Coatings shall be adherent, smooth, continuous and free of pits, blisters, nodules, oxide scale, and any other conditions that may interfere with the protective value and serviceability of the pliers. Cadmiujn plate will not be allowed. Pliers shall be coated with a supplementary rust preventative treatment.
Spring shall be capable of opening the jaws to the respective minimum jaw opening tip-to-tip dimension as specified in the tables for the individual type and class of pliers.
Dimensions shaD be determined by measuring the pliers with jaws in the closed and locked position. The overall length measurement shall include the adjusting screw.