SIST ISO 3547-1:2020

SLOVENSKI STANDARD
01-oktober-2020
Drsni ležaji - Zvite puše - 1. del: Mere
Plain bearings - Wrapped bushes - Part 1: Dimensions
Paliers lisses - Bagues roulées
Ta slovenski standard je istoveten z: ISO 3547-1:2018
ICS:
21.100.10 Drsni ležaji Plain bearings
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

INTERNATIONAL ISO
STANDARD 3547-1
Third edition
2018-07
Plain bearings — Wrapped bushes —
Part 1:
Dimensions
Paliers lisses — Bagues roulées —
Partie 1: Dimensions
Reference number
©
ISO 2018
© ISO 2018
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Published in Switzerland
ii © ISO 2018 – All rights reserved

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and units . 1
5 Dimensions . 2
6 Design . 9
7 Example for calculation of inside diameter, D .10
i
8 Designation .10
Bibliography .11
Foreword
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URL: www .iso .org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 123, Plain bearings, Subcommittee SC 3,
Dimensions, tolerances and construction details.
This third edition cancels and replaces the second edition (ISO 3547-1:2006), which has been technically
revised. The main changes compared to the previous edition are as follows:
— Normative references have been updated.
— Formulae for the minimum and maximum inside diameters of the bush have been added.
— A formula for the expansion of the housing bore due to the pressing in of the bush has been added.
A list of all parts in the ISO 3547 series can be found on the ISO website.
iv © ISO 2018 – All rights reserved

INTERNATIONAL STANDARD ISO 3547-1:2018(E)
Plain bearings — Wrapped bushes —
Part 1:
Dimensions
1 Scope
This document specifies the dimensions and designations of cylindrical and flanged wrapped bushes
made of mono and multi-layer bearing material for plain bearing applications.
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 4378-1, Plain bearings — Terms, definitions, classification and symbols — Part 1: Design, bearing
materials and their properties
ISO 4378-4, Plain bearings — Terms, definitions, classification and symbols — Part 4: Basic symbols
ISO 12301, Plain bearings — Quality control techniques and inspection of geometrical and material quality
characteristics
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 4378-1 and ISO 4378-4 apply.
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
— IEC Electropedia: available at http: //www .electropedia .org/
4 Symbols and units
See Table 1.
Table 1 — Symbols and units
Symbol Description Unit
B Width of the bush mm
C Inside chamfer mm
i
C Outside chamfer mm
o
D Inside diameter of the bush mm
i
D Minimum inside diameter of the bush mm
i,min
D Maximum inside diameter of the bush mm
i,max
D Inside diameter of the bush in the ring gauge mm
i, ch
D Flange diameter mm
fl
a
For bushes which are made of a single material, s = s or s = s .
1 3 2 3
Table 1 (continued)
Symbol Description Unit
D Housing bore diameter mm
H
D Minimum housing bore diameter mm
H,min
D Maximum housing bore diameter mm
H,max
D Outside diameter of the bush mm
o
D Mean diameter of the bush mm
o,m
D Mean housing bore diameter mm
H,m
D Shaft diameter mm
S
d Diameter of the checking block or ring gauge mm
ch, 1
E Expansion of the housing bore mm
Ra Surface roughness µm
r Flange radius mm
a
s Thickness of the bearing backing mm
a
s Thickness of the bearing material layer mm
a
s Wall thickness mm
s Minimum wall thickness mm
3,min
s Maximum wall thickness mm
3,max
s Flange thickness mm
fl
a
For bushes which are made of a single material, s = s or s = s .
1 3 2 3
5 Dimensions
See Figure 1 and Tables 2 to 4.
DD=− 2⋅s (1)
im,,ax Hmax 3,min
DD=− 2⋅s (2)
im,,in Hmin 3,max
This assumes that there is no expansion of the bore in the housing caused by pressing in the bush. In
reality, the expansion depends on several factors, such as the stiffness of the housing and the bush. An
example of the calculation is given in Clause 7.
The wall thickness tolerance depends on whether or not there is a machining allowance in the bush
bore and on the material type, as specified in ISO 3547-4. The preferred tolerance series (A to E) is
specified in Table 5.
Instead of the wall thickness, the inside diameter, D , of the bush may be specified. D is the inside
i, ch i, ch
diameter of the bush, when this is pressed into a ring gauge (Test C — gauging — in accordance with
ISO 3547-2; see also ISO 3547-6).
For bushes which are supplied with a machined bore (Series W), the tolerances of the inside diameter of
the bush, D , checked in a ring gauge, are given in Table 6.
i, ch
In no case shall wall thickness and inside diameter be given at the same time as the dimensions that are
to be checked.
The tolerance for the inside diameter, D , of the bush in the ring gauge is given in Table 6. The tolerance
i, ch
of the inside diameter of a bush pressed into a housing is found from the sum of the tolerance for, D ,
i, ch
and the tolerance of the housing bore. As in the case of the calculation of the inside diameter from the
wall thickness, it is assumed that there is no expansion of the housing bore.
Dimensions for the outside diameter, D , of the bush are given in Table 7.
o
2 © ISO 2018 – All rights reserved

a) Type C cylindrical bush
b) Type F flanged bush
Key
1 butt joint
a
Thickness of the bearing material layer: only valid as a basis for calculation in accordance with ISO 3547-2.
b
C may be a chamfer or break edge, in accordance with ISO 13715.
i
c
0,2 mm min. for nominal wall thickness 0,5 mm.
d
r = s
max 3.
Figure 1 — Cylindrical and flanged bush
Table 2 — Preferred nominal dimensions for inside diameter, D , outside diameter, D , wall
i o
thickness, s , and bush width, B
Dimensions and tolerances in millimetres
s = 0,5
a
B
D D s
i o 3
3 4 5 6 8 10 12
2 3 0,5 a a
3 4 0,5 a a a
4 5 0,5 a a a
5 6 0,5 a a a
6 7 0,5 a a a a
8 9 0,5  a a a a
10 11 0,5  a a a
s = 0,75
a
B
D D s
i o 3
3 4 5 6 7 8 10
2 3,5 0,75 a a
3 4,5 0,75 a a a
4 5,5 0,75
...