BS ISO 3547-5:2020 pdf free.Plain bearings – Wrapped bushes Checking the outside diameter.
BS ISO 3547-5 1 Scope This document specifies, following ISO 12301, the checking of the outside diameter of wrapped bushes [ISO 3547-2:2017, methods A, B and D] and describes the necessary checking methods and measuring equipment. NOTE The dimensions and tolerances of wrapped bushes are given in ISO 3547-1. Checking the wall thickness is the subject of ISO 3547-7.2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 286-2:2010, Geometrical product specifications (GPS)一ISO code system for tolerances on linear sizes一Part 2: Tables of standard tolerance classes and limit deviations for holes and shafts
ISO 1938-1, Geometrical product specifications (GPS)一Dimensional measuring equipment一Part 1: Plain limit gauges of linear size ISO 3547-2:2017, Plain bearings一Wrapped bushes一Part 2: Test data for outside and inside diameters.7.2 Checking method A一Measurement of outside diameter, D。 Check the outside diameter of a wrapped bush using measuring equipment as shown in Figure 2, with a checking block consisting of upper and lower halves (see Figures 3 and 4) and setting plugs (see Figures 5 and 6), at a determined checking load, Fch. Measure the outside diameter indirectly as the difference in the value of z, Oz. The checking load is calculated so that the bush outside diameter is reduced only elastically during checking and that there is no permanent deformation.7.3 Checking method B一Gauging of outside diameter, D。 Check the outside diameter of a wrapped bush in“GO” and“NO GO”ring gauges. 7.4 Checking method D一Measurement of outside diameter, D。> 120 mm Check the outside diameter of a wrapped bush above 120 mm diameter using a precision measuring tape.8 Selection of checking method for outside diameter Method A is a precise method involving complex tooling. Method B is an attributive method using simpler tooling. Method D is used only for wrapped bushes with an outside diameter > 120 mm. All three methods are in general use. Method A is generally unsuitable for small bushes up to 10 mm outside diameter but is preferred for bushes over 10 mm outside diameter.BS ISO 3547-5 pdf downlaod.