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ASME B18.8.1-2014 pdf download

ASME B18.8.1-2014 pdf download.Clevis Pins and Cotter Pins (Inch Series).
1 INTRODUCTION 1.1 Scope 1.1.1 This Standard covers the complete dimen- sional and general data for clevis pins sizes 3 ⁄ 16 in. through 2 in. and cotter (split) pins sizes 1 ⁄ 32 in. through 3 ⁄ 4 in. of various materials. 1.1.2 The inclusion of dimensional data in this Standard is not intended to imply that all products describedarestockproductionitems. Consumers should consult with suppliers concerning the availability of products. 1.1.3 There is no ISO standard comparable to this Standard. 1.2 Dimensions All dimensions in this Standard are given in inches and apply before plating or coating. Tolerancing is in accordance with ASME Y14.5. 1.3 Responsibility The responsible partyfor the performance ofthe prod- ucts within the scope ofthis Standard is the organization that supplies the components to the purchaser and certi- fies or represents that the componentwas manufactured, tested, and inspected in accordance with this specifica- tion and meets all of its requirements. 1.4 Inspection and Quality Assurance Unless otherwise specified by the purchaser, accept- ability shall be based on conformance with the require- ments specified in ASME B18.18. 1.5 Terminology For definitions of terms relating to pins or features thereof used in this Standard, refer to ASME B18.12. 1.6 Reference Standards ASME B18.12, Glossary of Terms for Mechanical Fasteners ASME B18.18, Quality Assurance for Fasteners ASME Y14.5, Dimensioning and Tolerancing Publisher: The American Society of Mechanical Engineers (ASME), Two Park Avenue, New York, NY10016-5990;OrderDepartment: 22LawDrive, P. O. Box 2900, Fairfield, NJ 07007-2900 (www.asme.org) 1 ASTM A153/A153M, Standard Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware ASTM A380, Standard Practice for Cleaning, Descaling, and Passivation of Stainless Steel Parts, Equipment, and Systems ASTM A493, Standard Specification for Stainless Steel Wire and Wire Rods for Cold Heading and Cold Forging ASTM A751, Standard Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products ASTM B134/B134M, Standard Specification for Brass Wire ASTM E384, Standard Test Method for Knoop and Vickers Hardness of Materials ASTM F1941, Standard Specification for Electrodeposited Coatings on Threaded Fasteners (Unified Inch Screw Threads (UN/UNR)) ASTM F2329, Standard Specification for Zinc Coating, Hot-Dip, Requirements for Application to Carbon and Alloy Steel Bolts, Screws, Washers, Nuts, and Special Threaded Fasteners Publisher: ASTM International, 100 Barr Harbor Drive, P. O. Box C700, West Conshohocken, PA 19428-2959 (www.astm.org) SAE J864, Surface Hardness Testing With Files Publisher: SAE International,400 CommonwealthDrive, Warrendale, PA 15096-0001 (www.sae.org) 2 GENERAL DATA — CLEVIS PINS 2.1 Clevis Pin Application The clevis pins covered hereinare intended for general applications. The clevis pins specified are intended for use in conjunction with clevises and rod end eyes, and the cotter pins contained herein. Tables 1 and 2 contain dimensional data relative to clevis pin dimensions. 2.2 Clevis Pin Head 2.2.1 Clevis Pin Top of Head. The top of the head shall be flat and either chamfered or rounded at outer periphery. 2.2.2 Clevis Pin Bearing Surface. The bearing sur- face of the head shall be flat and square with the axis of pin (determined over a distance from under the head equivalent to 1.5 times the basic pin diameter) within 2 deg.
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.

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