ASME B18-8-200M:2000 pdf download

ASME B18-8-200M:2000 pdf download.COTTER PINS, HEADLESS CLEVIS PINS, AND HEADED CLEVIS PINS (METRIC SERIES)
1 INTRODUCTORY NOTES
1.1 Scope 1.1.1 This Standard covers the complete dimensional and general data for cotter (split) pins recognized as an American National Standard. 1.1.2 The inclusion of dimensional data in this Standard is not intended to imply that all products described are stock production items. Consumers should consult with suppliers concerning the availbility of products. 1.2 Comparison With ISO Standards The cotter pins in this Standard are similar to the ISO 1234:1997 standard pins. Dimensional differences between this Standard and ISO 1234: 1997 are an approx- imate head height dimension, which is not called for in this Standard, and the wire width dimensions, which are not called out in the ISO Standard. These differences will not affect interchangeability of cotter pins manufac- tured to the requirements of either. 1.3 Dimensions All dimensions in this Standard are given in millime- ters, unless otherwise specified. Dimensions and toler- ances are in accordance with ASME Y14.5M. 1.4 Responsibility The responsible party for the performance of the products within the scope of this Standard is the organization that supplies the components to the pur- chaser and certifies or represents that the component was manufactured, tested, and inspected in accordance with this specification and meets all of its requirements. 1.5 Inspection and Quality Assurance Unless otherwise specified by the purchaser, accept- ability shall be based on conformance with the require- ments specified in ASME B 18.18.1M.
2 GENERAL DATA
2.1 Application The cotter pins specified are intended for use in pinned bolt and nut assemblies or other type of free fitting pinned assemblies in general applications. 2.2 Head Design A degree of leeway shall be permissible in the design of the head provided; however, the minimum outside diameter is maintained as specified in Table 2. 2.3 Length 2.3.1 Measurement. The length of pin, L, shall be measured, parallel to the axis of the pin, from the plane of contact of a gage with the head of the pin to the end of the prong or pin as depicted in the illustrations for the respective point types (see Fig. 1). The gage shall have a hole equal to the specified gage hole diameter within a tolerance of +0.03 mm (see : Table 2). The permissible break or rounding at the gaging edges of gaging holes shall not exceed 0.13 mm. The pin shall be inserted into the gage with finger pressure (force not to exceed 2.2 N). Where pins having point types other than those illustrated herein are gaged, the length, L，shall be measured from the plane of contact of the gage with the end of the shortest prong. 2.3.2 Tolerance on Length. The tolerance on length of cotter pins shall be as specified in Table 1. 2.3.3 Preferred Lengths. Table 3 depicts the pre- ferred sizes and lengths of pins that are normally available. Other sizes and lengths are produced, as required by the purchaser. 2.4 Prongs 2.4.1 Preferred Points. The preferred point type shall be the extended prong – – square cut or hammer lock design illustrated, as specified by the purchaser. Variations of the extended prong design and other types of points are also available, subject to mutual agreement between the purchaser and manufacturer. 2.4.2 Prong Alignment. The ends of the pins shall not be open, and any gaps occurring between the prongs along the shank portion of pins beyond the end shall not exceed to 0.4 mm for pins 8 mm and over. The misalignment of prongs over the entire length of the shank shall not stop the pin from being inserted into the gaging hole. 2.5 Material and Test 2.5.1 Material. Low carbon steel shall be used unless otherwise specified as agreed upon between the manufacturer and purchaser. 2.5.2 Analysis. Chemical composition determina- tions shall be made in accordance with methods given in ASTM E 30 when composition verification is specified. 2.5.3 Ductility. Each prong of the cotter pin shall be capable of withstanding being bent back upon itself once with no visible indication of fracture occurring at the point of bend. 2.5.4 Wire Section. Cotter pins are manufactured from approximately half-round wire, and it is desirable that the flat side of the wire have a small degree of rounding at the edges rather than sharp cormers.