BS ISO 3547-6:2020 pdf free.Plain bearings一Wrapped bushes,Checking the inside diameter.
BS ISO 3547-6 1 Scope The document specifies, following ISO 12301, the checking of the inside diameter of wrapped bushes (see ISO 3547-2:2017, method C) and describes the necessary checking methods and measuring equipment. NOTE 1 All dimensions in this document are given in millimetres except where otherwise noted/designated. NOTE 2 The dimensions and tolerances of wrapped bushes are given in ISO 3547-1. NOTE 3 Checking of the wall thickness is the subject of ISO 3547-7. NOTE 4 Checking of the outside diameter of wrapped bushes is the subject of ISO 3547-5. 2 Normative references There are no normative references in this document. 3 Terms and definitions No terms and definitions are listed in this document. ISO and IEC maintain terminological databases for use in standardization at the following addresses: ISO Online browsing platform: available at https://www.iso.org/obp 一IEC Electropedia: available at http://www.electropedia.org/ 6.5 Measuring errors Frequent measuring errors are as follows. a] Ring gauge and plug gauge are damaged or worn. b) Ring gauge and plug gauge have no lead-in chamfer. c) Bush is misaligned when introduced into the ring gauge. d] Plug gauge is misaligned when introduced into the bush.  e) Width of the ring gauge is less than the width of the bush. f) Grease, dirt, damages, burrs and swelling are present around features on the bush and test equipment. 7 Procedure The bush shall be introduced into the ring gauge from that side having the lead-in chamfer. Subsequently, the inside diameter shall be determined by means of a) the three-point measuring instrument; b) the GO plug gauge (see Figures 2 and 3), which shall be inserted with minimum effort; the NO- GO plug gauge, which shall not be able to be inserted with a maximum force of 250 N. Where it is necessary to limit the maximum force, it shall be agreed between supplier and user. BS ISO 3547-6 pdf download.