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 deter- mined over a length under the head equal to the nominal pin diameter.
2.3 Clevis Pin Lengths All clevis pin sizes are available in a variety ofnominal lengths. Table 2 provides a means of determining the cotter pin hole location, M, for all nominal pin lengths, G, for each clevis pin size. 2.3.1 Clevis Pin Measurement. The G and M lengths of the clevis pin shall be measured, parallel to the axis of pin, from the bearing surface of the head. 2.4 Clevis Pin Hole 2.4.1 Clevis Pin Hole Location. The clevis pin hole location is dimension, M.
2.4.2 Clevis Pin Hole Alignment and Angularity. The axis of hole through the shank shall not be offset from the axis of pin by more than 0.010 in. for the 3 ⁄ 16 -in. and 1 ⁄ 4 -in. nominal pin size and 0.020 in. for all larger pin sizes, and shall be square with the axis of pin within 2 deg.
2.4.3 Clevis Pin Hole Chamfer. The hole shall be chamfered or edges otherwise relieved at both ends to remove all burrs and sharp edges.
2.5 Clevis Pin Material and Heat Treatment Unless otherwise specified by the purchaser, clevis pins shall be made ofeither low or medium carbon steel. When case hardened pins are specified, they shall be resistant to a No. 58 file in accordance with SAE J864. 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 furnished with a plain (as processed) finish, not plated or coated. Other fin- ishes, where required, shall be subject to agreement between the manufacturer and the purchaser.
Finishes such as the following are suitable for use on clevis pins:
(a) Electroplating per ASTM B633 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 A380
2.7 Clevis Pin Workmanship Clevis pins shall be free from burrs, loose scale, sharp edges, and all other defects affecting their serviceability.
2.8 Clevis Pin Designation
Clevis pins shall be designated by the following data,in the sequence shown:
(a) product name (noun first)
(b) ASME B18.8.1
(c) nominal size (fraction or decimal equivalent)
(d) length (fraction)
(e) material
(f) protective finish, if required