This document specifies in accordance with ISO 12301 the checking of the wall-thickness of thin-walled half bearings with or without flange and describes the necessary checking methods and measuring equipment. It applies to a maximum bearing diameter of 150 mm. It can be applied to a bigger diameter, provided that there is an agreement between the supplier and the user.

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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.

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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 wra...view more

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This document describes, following ISO 12301, the checking methods and measuring equipment used for measuring the total wall thickness of thin-walled bushes in the finished state. NOTE All dimensions in this document are given in millimetres.

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ISO 12308:2017 defines the types of plain bearing samples exchanged between purchaser and manufacturer. In the field of internal combustion engines and other series production, it is necessary to work with different types of samples depending on the purpose. Types of samples are as follows. - Samples used for tests and examinations which are carried out in the experimental stage and pilot lot stage. These include fitting samples, prototype samples and intermediate samples. - Samples used to prov...view more

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ISO 13778:2017 specifies the selective assembly of bearings (in accordance with ISO 3548‑1). The bearing diametral clearance is determined by the housing diameter, journal diameter and the wall thickness of the two half bearings. Typically, these components will have a total tolerance "stack up" of 50 µm to 60 µm. Current engine development and in particular, the desire for improved engine refinement, has provided a need to decrease the clearance range due to the tolerance "stack up". This docum...view more

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ISO 12302:2017 specifies for plain bearings (except thick-walled half-bearings) those quality characteristics in accordance with ISO 12301 which can be used to regulate and control a production process on the basis of statistical process control (SPC). It covers dimensional variables but does not take account of attributes.

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ISO 12132:2017 gives guidelines for the preparation of a Design FMEA for thin-walled half bearings used in machinery, e.g. internal combustion engines (the Process FMEA is the responsibility of the supplier). It lists the common potential failure mode(s), potential effect(s) and potential cause(s) of failure. The numerical evaluation of risks in terms of occurrence, severity and detection can be specific to each application, manufacturer and customer. Since they have to be assessed in each case,...view more

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This part of ISO 3548 specifies, according to ISO 12301, the checking of the peripheral length of thin-walled half bearings with or without flange, and describes the necessary checking methods and measuring equipment. Thin-walled half bearings are flexible and, in the free condition, do not conform to a cylindrical profile. This is one reason the peripheral length of the half bearings can only be measured under a constraining load by use of specialized measuring equipment. In addition, measuring...view more

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ISO 12301:2007 specifies quality control techniques and inspection of the geometrical and material quality characteristics of the following types of plain bearings: thin-walled half-bearings with or without flange, as specified in ISO 3548; metallic thick-walled half-bearings (with and without flange) that are manufactured as halves but that are necessarily interchangeable and have the ratio s3 : Do > 0,11; wrapped bushes, as specified in ISO 3547; unsplit metallic bushes (with and without flang...view more

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