ISO 3548-1:2022
Plain bearings — Thin-walled half bearings with or without flange — Part 1: Tolerances, design features and methods of test
This document specifies tolerances, design features and test methods for thin-walled half bearings with integral flange up to an outside diameter of Do = 250 mm and without flange up to an outside diameter of Do = 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 document 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 can 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 according to ISO 6526, or a half bearing with assembled flanges.
NOTE All dimensions and tolerances are given in millimetres.
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Dimensions and tolerances
5.1 Housing diameter, half bearing outside diameter and crush height
5.2 Half bearing wall thickness and bearing bore
5.3 Width of half bearing, distance between flanges, outside diameter of flange and flange thickness
5.4 Free spread
6 Design features
6.1 General
6.2 Locating nick and recess
6.3 Reliefs and chamfers
6.4 Transition between radial part and flange
6.5 Assembled flange scalloped toes
6.6 Oil grooves and holes
7 Test data for determining the peripheral length
7.1 Calculation of test force F
7.2 Checking method A
7.3 Checking method B
8 Test data for determining axial width, B2, of flange bearings
8.1 General
8.2 Go between two parallel plates
8.3 Axial width B2 checked under force
9 Function and characteristics of assembled flange bearings
9.1 General
9.2 Characteristics
9.3 Classification
9.4 Checklist of items for ensuring the function of assembled flange bearings
Bibliography
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Dimensions and tolerances
5.1 Housing diameter, half bearing outside diameter and crush height
5.2 Half bearing wall thickness and bearing bore
5.3 Width of half bearing, distance between flanges, outside diameter of flange and flange thickness
5.4 Free spread
6 Design features
6.1 General
6.2 Locating nick and recess
6.3 Reliefs and chamfers
6.4 Transition between radial part and flange
6.5 Assembled flange scalloped toes
6.6 Oil grooves and holes
7 Test data for determining the peripheral length
7.1 Calculation of test force F
7.2 Checking method A
7.3 Checking method B
8 Test data for determining axial width, B2, of flange bearings
8.1 General
8.2 Go between two parallel plates
8.3 Axial width B2 checked under force
9 Function and characteristics of assembled flange bearings
9.1 General
9.2 Characteristics
9.3 Classification
9.4 Checklist of items for ensuring the function of assembled flange bearings
Bibliography