ISO 3548 pdf download

ISO 3548 pdf download.Plain bearings — Thin-walled half bearings with or without flange — Tolerances, design features and methods of test 1 Scope This International Standard specifies tolerances, design features and test methods for thin-walled half bearings with integral flange up to an outside diameter of D o of 250 mm and without flange up to an outside diameter of D o of 500 mm. Due to the variety of design it is, however, not possible to standardize the dimensions of the half bearings. Half bearings according to this International Standard are predominantly used in reciprocating machinery and consist of a steel backing and one or more bearing metal layers on the inside. In reciprocating machinery, flanged half bearings may be used in connection with half bearings without flange. Alternatively to serve as a flanged half bearing, it is possible to use a half bearing without flange together with two separate half thrust washers in accordance with ISO 6526; or a half bearing with assembled flanges. NOTE All dimensions and tolerances are given in millimetres. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 4288, Geometrical Product Specifications (GPS) — Surface texture: Profile method — Rules and procedures for the assessment of surface texture . ISO 6524, Plain bearings — Thin-walled half bearings — Checking of peripheral length . ISO 6526, Plain bearings — Pressed bimetallic half thrust washers — Features and tolerances . 3 Symbols See Figures 1 and 2 and Table 1 . 4 Dimensions and tolerances 4.1 Housing diameter, half bearing outside diameter and nip The housing diameter shall be manufactured to tolerance class H6. Thereby the half bearing outside diameter shall be selected with such an oversize that an adequate interference fit is ensured in the housing diameter. In the case of housings made from materials having a high coefficient of expansion or where other factors such as housing dimensional stability are involved, the housing...