ASME B18.8.1 pdf download

ASME B18.8.1 pdf download.Clevis Pins and Cotter Pins(Inch Series).
2.2.3 Clevis Pin Head Periphery. The periphery of the head shall be within a circular runout equal to 12% of the maximum head diameter or 0.020 in.. whichever is greater, with respect to the axis of the shank, as determined over a length under the head eqtial to the nominal pin diameter.
2.3 Clevls Pin Lengths
All clcvis pin sizes are available in a variety olnominal lengths. Table 2 provides a means of determining the ct1er pin hole location, M, for all nominal pin lengths, C, for each davis pin size.
2.3.2 ClevisPinMeasurement. TheGandMk’ngths at the davis pin shall be measuwd, parallel to the axis of pin, 1mm the bearing surface of the head.
2.4 Clevis Pin Hole
2.4.1 Clevis Pin Hole Location. The davis pin hole location is dimension. M.
2.4.2 Clevis Pin Hole Atlgnment and Angularity. The axis of hole through the shank shall not be offset the axis of pin by mow than 0.010 in. for the and 4-in. nominal pin size and 0.020 in. for all larger pin sizes, and shall be squaw with the axis of pin within 2 deg.
2.4.3 CIevis PIn Hole Chamfer. The hole shall be chamfered o edges otherwise reLieved at both ends to remove all burrs and sharp edges.
2.5 Clevls Pin Material and Heat Treatment
Unless otherwise specified by th purchaser. davis pins shall be made of either low or medium carbon steel.
When case hardened pins are specified, they shall be resistant to a No. 58 file in accordance with SAE 1864. In the event of dispute. case hardness and depth shall be evaluated by micro-hardness according to ASTM E384, The case hardness shall be a minimum of 633 HV (HRC 57) with a depth between 0.010 in. and 0.016 in.
2.6 Clevis Pin Finish
Clevis pins shall normally be tumished with a plain (as processed) finish, not plated or coated. Other finishes, where required. shall be subject to agreement between th manufacturer and th purchaser.
Finishes such as the lollowing are suitable for use on clevis pins:
(a) Electroplating per ASTM 8633 or F1941 (cadmium is not a recommended finish)
(b) Hot dipped zinc coatings ASTM A153 or F2329
(c) Passivation of corrosion resistant pins per ASTM A3&)
2.7 Clevis Pin Workmanship
Clevis pins shall be free from burrs, loose scale, sharp edges, and all other defects affecting their serviceability.
3.4 Cotter Pin Prongs
3.4.1 Cotter Pin Preferred Points. The preferred point type shall be the estended prong — square cut or harnnwr lock designs illustrated, as specified by purchaser. Variations of the e,tended prong design and other types of points are also ava ilahle suhect to mutual agreement between the purchaser and manufacturer.
3.4.2 Cotter Pin Prong Alignment. The ends of the pins shafl not be open and any gaps occurring between the prongs along the shank portion of pins beyond the end shall not exceed 0.015 in. for pins under 1M In. in diameter; 0.025 in. for pins from in. to 4 in. in diameter, and 0.045 in. for pins in. and over. The misalignment of prongs over the entire length of shank shall not stop the pin from being inserted into the gaging hole.
3.5 Cotter Pin Material and Test
33.1 Cotter Pin MateriaL Unless otherwise specified by the purchaser. cotter pins shall he made of low carbon steel.
When so specified by purchaser. pins m.ay also be made from material such as ASTM A493, Types 3&2 (UNSS3O200),3(M(UNSS3O400),and 316 (UNSS3I600) corrosion resistant steel; ASIM 13134. Alloy 260 (UNS C26000), cartridge brass; Mond Alloy (UNS N04400); or other material as agreed upon between manufacturer and purchaser.
33.2 Cotter Pin Aaalysls. Chemical composition determinations shall be made in accordance with methods given in ASTM Standard A751 when composition verification is specified.
3.5.3 Cotter Pin Ductility. Each prong of the cotter pin shall be capable of withstanding being bent back.