|
STANDARD
First edition
1992-12-15
Plain bearings -
Quality control techniques and
inspection of geometrical and material quality
characteristics
Paliets Iisses - Jechniques de con trOle de Ia qualitk et vbrifica tions des
carac tkris tiques de qualitk gkomk triques et des ma thriaux
Reference number
ISO 12301 : 1992 (E)
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ISO12301:1992(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of
national Standards bodies (ISO member bedies). The work of preparing International
Standards is normally carried out through ISO technical committees. Esch member
body interested in a subject for which a technical committee has been established has
the right to be represented on that committee. International organizations, govern-
mental and non-governmental, in liaison with ISO, also take part in the work. ISO
collaborates closely with the International Electrotechnical Commission (IEC) on all
matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are circulated to
the member bodies for voting. Publication as an International Standard requires
approval by at least 75 % of the member bodies casting a vote.
International Standard ISO 12301 was prepared by Technical Committee ISO/TC 123,
Plain bearings, Sub-Committee SC 5, Quality analysis and assurance.
(The draft International Standard was circulated under the number ISO/DIS 8259.)
Annexes A and B of this International Standard are for information only.
0 ISO 1992
All rights reserved. No part of this publication may be reproduced or utilized in any form or by any
means, electronie or mechanical, including photocopying and microfilm, without Permission in
writing from the publisher.
International Organization for Standardization
56 . CH-121 1 Geneve 20 l Switzerland
Case postale
Printed in Switzerland
ii
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INTERNATIONAL STANDARD ISO 12301 : 1992 (E)
Quality control techniques and
Plain bearings -
inspection of geometrical and material quality
characteristics
agreements based on this International Standard are encouraged
1 Scope
to investigate the possibility of applying the most recent editions
of the Standards indicated below. Members of IEC and ISO main-
This International Standard specifies quality control techniques
and inspection of the geometrical and material quality tain registers of currently valid International Standards.
characteristics of the following types of plain bearing :
ISO 286-1 : 1988, /SO System of limits and fits - Part 1: Bases
-
of tolerantes, deviations and fits.
metallic thin-walled half-bearings, as specified in
ISO 3548;
ISO 468 : 1982, Surface roughness - Parameters, their values
-
metallic thin-walled flanged bearings, as specified in and general rules for specifying requirements.
ISO 6864;
ISO 1880 : 1979, Instruments for the measurement of surface
-
metallic thick-walled half-bearings (with and without
roughness by the Profile method - Contact fstylusl in-
flange) which are manufactured as halves but which are
s trumen ts 0 f progressive Profile transforma tion - Profile
not necessarily interchangeable and have the ratio
recording ins trumen ts .
- D, > 0,ll;
Stot *
ISO 2178 : 1982, Non-magnetic coatings on magnetic
- wrapped bushes, as specified in ISO 3547;
- Measurement of coating thickness - Magnetit
substra tes
method.
-
unsplit metallic bushes (with and without flange) made
from solid and multilayer materials and with outside
ISO 2795 : 1991, Plain bearings - Sintered bushes - Dimen-
diameters up to 230 mm, as specified in ISO 4379;
sions and tolerantes.
-
thermoplastic bushes (with and without flange) with in-
ISO 3543 : 1981, Metallic and non-metallic coatings -
side diameters up to and including 200 mm;
Measurement of thickness - Beta backscatter method.
-
ring-type thrust washers and pressed bimetallic half-
ISO 3547 : 1976, Plain bearings - Wrapped bushes - Dimen-
thrust washers, as specified in ISO 6525 and ISO 6526, re-
sions, tolerantes and methods of checking.
spectively;
ISO 3548 : 1978, Plain bearings - Jhin- waled half bearings -
-
plain bearings made from sintered material, as specified
Dimensions, tolerantes and methods of checking.
in ISO 2795.
ISO 4378-1 : - ‘1, Plain bearings - Terms, definitions and
classifica tion - Part 7 : Design, bearing materials and their
2 Normative references
properties.
The following Standards contain provisions which, through ISO 4379 : - 2), Plain bearings - Copper alloy bushes.
reference in this text, constitute provisions of this International
ISO 4384-1 : 1982, Plain bearings - Hardness testing of bear-
Standard. At the time of publication, the editions indicated
ing metals - Part 7 : Compound materials.
were valid. All Standards are subject to revision, and Parties to
1) To be published. (Revision of ISO 4378-1 : 1983)
2) To be published. (Revision of ISO 4379 : 1978)
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ISO 12301 : 1992 (E)
ISO 4384-2 : 1982, Plain bearings - Hardness testing of bear- where
ing metals - Part 2: Solid materials.
t is the stochastic variable according to Student ’s t distri-
ISO 4386-1 : 1992, Plain bearings - Metallic multilayer plain
bution; t = 2 and corresponds to a statistical uncertainty in
bearings - Part 7: Non-destructive ultrasonic testing of bond.
measurement P = 95 %, for which the probability of ex-
ceeding the value (1 -P) = 0,05 or 5 %;
ISO 4386-2 : 1982, Plain bearings - Metallic multila yer plain
bearings - Part 2: Destructive testing of bond for bearing CT is the Standard deviation.
metal layer thicknesses > 2 mm.
NOTE 1 The uncertainty of is included in the
measurement normally
tolerante given.
ISO 4386-3 : 1992, Plain bearings - Metallic multila yer plain
bearings - Part 3: Non-destructive penetrant testing.
3.6 measuring Points [linesl: Agreed Points [linesl
ISO 6524 : 1983, Plain bearings - Methods of dimensional
established to facilitate agreement on testing.
control - Peripheral length checking of thin-waled half bear-
ings.
NOTE 2 The establishment of measuring Points [lines] does not
preclude the need to comply with dimensional specifications in other
ISO 6525 : 1983, Plain bearings - Ring type thrust washers
areas.
made from Strip - Dimensions and tolerantes.
37
tolerante : R ange of acceptable measurements between
I SO 6526 : 1983, Plain bearings - Pressed bime tallic half
the u pper specif ied limit and the lower specified limit.
thrust washers -
Features and tolerantes.
ISO 6691 : 1989, Jhermoplastics for plain bearings -
4 Symbols and units
Classifica tion and designa tion.
ISO GBM : 1984, Plain bearings - Jhin-walled flanged half
For the purposes of this International Standard, the Symbols
bearings - Dimensions, tolerantes and methods of checking.
and units are as given in table 1.
ISO 12306 : - 1 ), Plain bearings - Measurement o f Wall
Table 1
thickness o f thin- walled half-bearings and thin- walled unsplit or
wrapped bushes.
Symbol Parameter SI Unit
ISO 12307 : - 11, Plain bearings - Checking the outside
a Crush height mm
(nip)
diameter of wrapped bushes.
Aa Measured Change in a mm
Distance between measu ring lines mm
Uc
3 Definitions mm
Distance between gauge faces
UE
Distance between flanges mm
Ufl
For the purposes of this International Standard, the definitions
A Eff ective Cross-section mm2
eff
of technical terms relating to plain bearings given in ISO 4378-1
B Width mm
and the following definitions of terms relating to quality and
measurement apply. Joint displacement mm
BA
mm
Diameter of the checking block bore
4
3.1 quality of plain bearing: Condition which renders a
Housing diameter mm
dH
plain bearing fit to fulfil given requirements. The given re-
Flange diameter mm
Dfl
quirements are generally dependent upon the intended use.
Diameter measured across the joint in
Dfs
mm
the free state; free spread diameter
3.2 quality control techniques: The method, equipment
Inside dia meter mm
Di
and procedure by means of which the quality of a plain bearing
mm
Outside diameter
DO
is assessed.
E Elastic reduction mm
red
Checking load N
FC
of
means
3.3 quality characteristic : Characteristic bY
F* Checking load (measuring pin) N
which the quality of a plain bearing is judged. w
F Tangential load of bearing as fitted N
tan
Joint face taper mm
one or more quality cha rac-
34 inspection: Checking of hA
irements.
teristics of a plain bearing with a pplicable requ
H Height mm
r Repeatability
IJm
35 .
uncertainty of measurement: The uncertainty of
Steel thickness mm
Sl
measurement, u, tan be calculated using the following for-
Bearing lining thickness mm
s2
mula :
Bearing lining thickness, reduced
mm
, ‘2, red
Flange thickness mm
U = + t-a
Sfl
1) To be published.
2
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ISO 12301 : 1992 (E)
Table 1 (concluded)
5 Summary of defined quality characteristics
Symbol Parameter SI Unit A summary of defined quality characteristics is given in table 2
for the convenience of users of this International Standard, as a
Wall thickness (total) mm
Stet
guide indicating which defined quality characteristics are rel-
T Tolerante mm
evant to each type of bearing.
2.4 mm
Uncertainty of measurement
The sequence of the characteristics listed in table 2 does not
. . . . Individual measured values mm
Xlfx2t xi
determine their importante. The manufacturer and user shall
E Maximum deformation in
max
mm
agree on priorities for the quality characteristics which, from
compression
their Points of view, are required to assure reliability and life-
E Minimum deformation in compression mm
min
time of the product.
Tangential strength N/mm2
Otan
N/mm2 NOTE 3 A key explaining the meaning of signs used in table 2 is pro-
@ Stress
vided at the bottom of the table.
Table 2
Type of plain bearing
Relevant
Thin- Thick-
clause/
Quality characteristic
walled walled
sub-clause
half-
half-
No.
bearing bearing
6 Geometrical quality
characteristics
-~~- -- ---.----- -_-- ------- -
6.1 Wall thickness, stet
- -
6.1 .l Line measurement + + + + +
+
6.1.2 Point measurement + + + + + +
-
+ + + + +
6.2 Outside diameter, DO +
-
Inside diameter, Di + + + + + +
6.3
-
6.4 Width, B + + + + + +
-
+ + +
6.5 Locating features + + +
6.6 Lubricant feed and distibution
-
+ +
+ + + +
features
-
+
6.7 Surface conditions + + + + +
- - - - - -
Crush height, a +
6.8
- - - - -
Free spread + +
6.9
- - - - - -
6.10 Straightness of sliding surface +
-
- - - - -
6.11 Joint face taper, h, +
- - - - - -
+
6.12 Back contact
- - - - - -
Joint displacement, B, +
6.13
- - - - -
6.14 Height of thrust half-washer, H (+) +
- - - -
-
+
6.15 Flatness (+)
-
+ + + + + +
6.16 Flange diameter, D,,
- -
+ + + + +
6.17 Distance between flanges, afl
-
6.18 Flange thickness, sf1 + + + + + +
6.19 Perpendicularity (squareness)
-
+ + + +
+ (+)
of flange
6.20 Geometrie deviations
- - - -
+
6.20.1 Cylindricity (+) (+)
- - -
+ +
6.20.2 Run-out of thrust face (+) (+)
- - -
6.20.3 Coaxiality and concentricity + + + +
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ISO 12301 : 1992 (El
Table 2 (concluded
Type of plain bearing
Relevant
Thin- ’ Thick-
Thrust
clause/
U nsplit Thermo-
Quality characteristic walled walled
Wrapped Sintered washer
ub-clause
metallic plastic
half- half- bush
bush (ring
No.
bush bush
bearing bearing
and half)
Material quality
characteristics
-------w-----v. --_ --. --. --.__ ___-________
7.1 Metallic solid material
- - - - -
7.1 .l Hardness + +
- - - - -
7.1.2 +
Material composition +
- - - -
-
7.1.3 Material structure + +
7.2 Multilayer metallic material
- - -
7.2.1 +
Overlay proper-Ges + + +
-
- -
7.2.2 Lining properties + + +
+
- - -
7.2.3 Backing properties + + + +
7.2.4 Adhesion (band) of adjacent
- -
-
+ + +
+
layers
7.3 Plastic layer material
- - - - -
7.3.1 Overlay proper-Ges +
(+)
- - -
- -
+
7.3.2 Lining proper-Ges (+)
- - - - -
7.3.3 +
Backing properties (+)
7.3.4 Adhesion (band) of adjacent
- - - - -
+
(+)
layers
7.4
Thermoplastic material (solid)
- - - - - -
7.4.1 Material composition +
-
- - - - -
7.4.2 Material structure +
7.5 Sintered material
- - - - - -
7.5.1 +
Material composition
- - - - - -
7.5.2 Material structure +
Plus sign indicates that the characteristic is generally applicable to all types of bearings.
Plus sign in parentheses indicates that this characteristic is not always applicable.
Minus sign indicates that the characteristic is not relevant for the corresponding type of bearing.
6 Geometrical quality characteristics
In Order to assess plain bearing quality, important dimensional quality characteristics are specified in this clause.
Unless othetwise stated, the dimensions in the tables and figures are given in millimetres.
6.1 Wall thickness, stet
See table 3.
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IS012301:1992(E)
Table 3
Applica- Definition of geometrical
Test equipment
Test method/measuring principle
bility
characteristic to be measured
Metallic See figure 1 and ISO 12366. In accordance with ISO 12366. (See
figure 2.) Device for measuring wall thickness (sec
thin-walled
also ISO 12306).
half-
NOTE - This test method is also applicable
bearing
when measuring joint face bore relief.
.-. --.
-l- +
Figure 1 Figure 2
------_- ---_- --------
Device for measuring wall thickness.
See figure 1 and ISO 12306. Measured normal to the back surface in
Metallic
the radial direction using the spherical
thick-
faces of the measuring Pins, in accord-
walled
ante with ISO 12306. (See figure 2.1
half-
bearing
------- -
Device for measuring wall thickness (sec
Wrapped See figure 1 and ISO 12306. In accordance with ISO 12306. (See
figure 2.) also ISO 12306).
bush
NOTE - Depending on the manufacturing pro-
cess, the back of the wrapped bush may show
slight hollows. The wall thickness shall,
therefore, be measured outside these hollows,
i. e. on the “bearing areas” (sec ISO 3547).
In the cases Di < 8 or Di > 150, the test
method shall be subject to agreement between
the manufacturer and User.
-----
In accordance with ISO 12306. (See Device for measuring wall thickness (sec
U nsplit See figure 1 and ISO 12306.
figure 2.) also ISO 12306).
metallic
bush
NOTE - The wall thickness may also be deter-
mined by obtaining the differente between the
outside and inside diameters (D, - Oi) (sec 6.2
and 6.3).
_----
In accordance with ISO 12306. (See Device for measuring wall thickness.
Thermo- See figure 1 and ISO 12306.
figure 2.)
plastic
bush
---
In accordance with ISO 12306. (See Device for measuring wall thickness (sec
Sintered See figure 1 and ISO 12306.
figure 2.) also ISO 12306).
bush
------ --_-
Measured parallel to the axial direction Device for measuring wall thickness.
Thrust Axial distance between the two faces of
using the spherical faces of the measuring
washer the washer (sec figure 3).
pins (see figure 4).
stet
-ll-
4
T
-ll-
Figure 4
Figure 3
5
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ISO 12301 : 1992 (E)
6.1 .l Line measurement (Wall thickness)
See table 4.
Table 4
Applica- Definition of geometrical Test method/measuring
Test equipment
bility
characteristic to be measured principle
Metallic The thickness of the half-
See figure 5 and ISO 12306. Device for measuring wall thickness (sec also
thin-walled bearing or bush is measured
ISO 12306).
half- continuously on one, two or
NOTE - The distance ac between the
bearing; measuring lines is measured from the edge three predetermined or agreed
of the sliding surface.
wrapped measuring lines, in accordance
bush; with ISO 12306. (See figure 5.)
unsplit
metallic NOTE - The defined Position of the
measuring iines may have to be
bush
modified to avoid design features
such as grooves, etc.
Figure 5
--------~- -
Metallic See figure 6 and ISO 12366. The thickness of the half-
Device for measuring wall thickness; for details see the
thick- bearing is measured continu- following table.
walled - The distance a, between the ously on two predetermined or
NOTE
measuring lines (a, = 6) is measured from
half- agreed measuring lines, in
the edge of the sliding surface.
bearing accordance with ISO 12306.
Uncer- Radius
Checking load
Wall
(See figure 6.) (measuring pin) tainty of of meas-
thickness
measure- uring
Fpin
%ot
ment anvil
NOTES N
1 In the case where Stet > 25, the
0,8 < Fpin 4 1,5 fO,ool 5 L
Stet Q ‘0
test method shall be subject to
3 ZL 0,2
agreement between the manufacturer
1,5 < Fpin Q 2,5 f 0,002
10 and User.
The defined Position of the
2
measuring lines may have to be
modified to avoid design features
such as grooves, etc.
Figure 6
I I
I
6
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ISO 12301 : 1992(E)
Table (4 (concluded)
Applica- Test method/measuring t
Definition of geometrical
Test equipment
.
bility characteristic to be measured principle
The thickness of the bush is
Thermo- See figure 7 and ISO 12306.
plastic measured continuously on one, Device for measuring wall thickness; for details see the
two or three predetermjned or . following table.
bush NOTE - The distance a, between the
measuring lines (a, = 1,5) is measured agreed measuring lines, in
from the edge of the sliding surface.
accordance wit,h ISO 12306.
(See figure 7.)
Checking load Radius
Uncer-
Outside
(measuring pin) of meas- tainty of
diameter
F- uring measu re-
NOTE - The defined Position of the
Pin
DO
Measuring lines
anvil ment
measuring lines may have to be
N
modified to avoid design features
, such as grooves, etc.
DO<150 0,8 < Fpin Q 1,5 3 f 0,2
+ 0,005
5 * 0,2
15O Figure 7
6.1.2 Point measurement (Wall thickness)
See table 5.
Table 5
Applica- Definition of geometrical Test method/measuring
Test equipment
principle
bility characteristic to be measured
In accordance with
Metallic Wall thickness measured at determined Device for measuring wall thickness (sec also
thin-walled measuring Points (sec ISO 12306). ISO 12306. ISO 12306).
half-
bearing; NOTE - The defined Position of
the measuring Points may have
wrapped
to be modified to avoid design
bush;
features such as grooves, etc.
unsplit
metallic
bush
-_------------
c
Metallic Wall thickness measured at determined In accordance with / External micrometer with dial indicator.
thick- measuring Points which are subject to ISO 12306.
walled agreement between the manufacturer
half- and User. NOTE - The defined Position of
the measuring Points may have
bearing
to be modified to avoid design
features such as grooves, etc.
Thermo- Wall thickness measured at determined In accordance with External micrometer with dial indicator.
ISO 12306.
plastic measuring Points (sec ISO 12306).
bush; Device for measuring wall thickness (sec also
NOTE - The defined Position of ISO 123061.
sintered
the measuring Points may have
bush
to be modified to avoid design
features’ such as grooves, etc.
7
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ISO12301:1992(E)
Table 5 (conchded)
Applica- Definition of geometrical Test method/measuring
Test equipment
bility principle
characteristic to be measured
Thrust The thrust washer is measured External micrometer with dial indicator.
Wall thickness measured at deter-
washer mined measuring Points (P) on at measuring Points positioned
as shown in figure 8. Device for measuring wall thickness; for details see the
measuring lines at a distance a, from
the inside diameter of the washers, following table.
NOTE - The defined Position of the
as shown in figure 8.
measuring Points may have to be
modified to avoid design features
such as grooves, etc.
Checking load
U ncertainty of
(measuring pin) Radius of
F-
measuring anvil measurement
pm
N
kl0 %
0,8 < FDin < 1,5 3 +0:2
of tolerante
w
Measuring Points
Thrust half-washers: rx = 80°
Thrust washers: Q = 120°
Figure 8
6.2 Outside diameter, DO
See table 6.
Table 6
Test method/measuring
Applica- Definition of geometrical
Test equipment
principle
bility characteristic to be measured
Measuring device.
Metallic Outside diameter of a metallic thick-walled Measured in the radial direction between
two flat parallel faces of the measuring
thick- half-bearing measured as a pair in the free
device (sec figure 101. Holding device.
walled condition, determined using the following
half- formula :
/
Uncertainty of measurement: Z!I IO % of
bearing
Q
x3 + 0,5(X, + X2)
the tolerante on outside diameter.
D,=- 2 - -il-
Figure 9
Figure 10
. _ . __. --. --. --. .- ----. --. -_ ---- -------
I 1
In accordance with ISO 12307. In accordance with ISO 12307.
See ISO 12307.
Wrapped
bush
---------------------- Page: 10 ----------------------
ISO 12301 : 1992 (EI
Table 6 koncluded
- ~
Test method/measuring
Applica- Definition of geometrical
Test equipment
bility principle
characteristic to be measured
Measured in the radial direction between two Measuring device.
U nsplit
Outside diameter of a bush
flat parallel faces of the measuring device (sec
metallic measured in the free condition,
External micrometer with dial indicator.
bush; figure IO).
determined as the arithmetic
thermo- mean of at least two
Holding device.
plastic NOTE - In cases where the wall thickness outside
measurements (see figure 11).
diameter ratio is such that the bush may be considered
bush;
to be flexible, DO may be measured in accordance with
Uncertainty of measurement: Z!I 10 % of
sintered
method A specified in ISO 12307 for wrapped bushes.
tolerante on outside diameter.
bush
Figure 11
Measured in the radial direction between two flat Standard test equipment.
Thrust Outside diameter of a thrust
parallel faces of the measuring device.
washer washer measured in the free con-
Uncet-tainty of measurement: Z!I 10 % of
dition over the outside end faces
tolerante on outside diameter.
NOTE - Measuring method should take account of
(sec figure 12).
design features such as chamfers.
.- --
4
8%
Figure 12
6.3 Inside diameter, Di
See table 7.
Table 7
Test method/measuring
Applica- Definition of geometrical
Test equipment
principle
bility characteristic to be measured
Measured in the radial direction using the Measuring device, such as an internal two-
Metallic Inside diameter of a metallic thick-walled
spherical faces of the measuring pins (sec Point contact measuring instrument with a
thick- half-bearing with cylindrical bore measured
figure 14). contact radius of 3 * 0,2.
walled half- as a pair in the free condition, determined
using the following formula:
bearing
Holding device.
x3 + 0,5(x, + x2)
Di =
Uncef-tainty of measurement: Z!I 10 % of
the tolerante on inside diameter.
0
m
+I
0
s
Figure 14
NOTES
1 The inside diameter may also be determined
by calculating the differente between the outside
diameter and the wall thickness (DO - stet)
(sec 6.1 and 6.2).
Figure 13
2 The defined Position of the measuring areas
may have to be modified to avoid design features
such as oil pockets, etc.
__- -_-_ --__---_---_--- -
9
---------------------- Page: 11 ----------------------
ISO 12301 : 1992 (E)
Table 7 hntinued)
Applica- Applica- Definition Definition of of geometrical geometrical Test method/measuring
Test equipment
bility bility characteristic characteristic to to be be measured measured principle
I
Wrapped Inside Inside diameter diameter of of a a wrapped wrapped bush bush Measured in the radial direction using the
Bore gauge (two- or three-Point contact)
bush measured measured in in pressed-in pressed-in Position Position (sec (sec spherical faces of the measuring pins (sec with setting gauge.
figure figure 15). 15). figure 16).
Air gauge with setting gauge.
NOTE - The inside diameter may also be deter-
mined by calculating the differente between the
Measuring device in accordance with
outside diameter and the wall thickness
ISO 12306 and ISO 12307.
(DO - +-,J (sec 6.1 and 6.2).
For details of the measuring device, see the
following table.
Figure Figure 15 15 Figure 16
Measured in the radial direction using the
U nsplit Inside Inside diameter diameter of of a a bush bush measured measured in in Bor-e gauge (two- or three-Point contact)
the the free free condition, condition, determined determined as as the the spherical faces of the measuring pins (sec with setting gauge.
metallic
bush; arithmetic arithmetic mean mean of of at at least least two two figure 16).
measurements measurements (sec (sec figure figure 17). 17). Air gauge with setting gauge.
sintered
bush
Plug gauge.
For details of the measuring device, see
table for wrapped bush.
Figure Figure 17 17
Measured in the radial direction using the Bore gauge (two- or three-Point contact)
Thermo- Inside Inside diameter diameter of of a a bush bush measured measured in in
with setting gauge.
plastic the the pressed-in pressed-in condition, condition, determined determined as as spherical faces of the measuring pins (sec
figure 16).
bush the the arithmetic arithmetic mean mean of of at at least least two two
Air gauge with setting gauge.
measurements measurements (sec (sec figure figure 15). 15).
NOTES
Ring gauge.
1 The bush is pressed into two ring gauges in
succession, one of which corresponds to the
For details of the measuring device, see
maximum dimension and the other to the
table for wrapped bush.
minimum dimension of the agreed tolerante
zone of the location hole. When pressed into
the ring gauge with the minimum dimension,
NOTE - The use of measuring instruments which
the inner diameter of the bush shall not be less are also capable of measuring shapes of bush
than the lower limit. When pressed into the ring
bores which deviate from the cylindrical shape is
gauge with the maximum dimension, the inner recommended. The width of the ring gauges shall
diameter of the bush shall not exceed the upper
be greater than the width of the bush; the per-
limit.
missible deviations for the ring gauges amount to
+ 1!2 IT3, in accordance with ISO 286-1.
2 In the case of bushes with two flanges, the
measurement is carried out, for example, by
using Split-ring gauges.
10
---------------------- Page: 12 ----------------------
IS012301:1992-(EI
Table 7 (concluded)
Definition of geometrical characteristic Test method/measuring
Applicability Test equipment
principle
to be measured
Measured in the radial direc- Standard test equipment.
Thrust washer Inside diameter of a thrust washer measured in the
tion.
free condition between the inside end faces (sec
Uncertainty of measure-
figure 18).
ment: Z!Z 10 % of tolerante
NOTE - Measuring method
should take account of design
on inside diameter.
features such as chamfers.
<
---4----
@Di
:
Figure 18
6.4 Width, B
See table 8.
Table 8
Test methodimeasuring
Definition of geometrical characteristic
Test equipment
Applicability
to be measured principle
Thin-walled and thick- Width between the end faces measured at any Point Measured between two flat Measuring device.
walled half-bearing; in the axial direction (sec figure 19). parallel faces of a measuring
wrapped bush; device. Standard test equipment.
unsplit metallic bush;
NOTE - Flanged bearings may
Uncertainty of measure-
thermoplastic bush;
also be manufactured from plain
ment : &- 10 % of tolerante
sintered bush
journal bearings and thrust
on length.
washers, in which case an ap-
propriate checking method
should be agreed between the
manufacturer and User.
B
Y
Figure 19
---------------------- Page: 13 ----------------------
IS012301:1992(E)
6.5 Locating features
See table 9.
Table 9
Definition of geometrical characteristic Test methodimeasuring
Applicability Test equipment
to be measured principle
Standard measuring Measuring device.
Thin-walled and thick- Element which locates the half-bearing, bush and thrust
methods.
walled half-bearing; washer (sec examples in figures 20 to 25).
Standard test equipment.
wrapped bush;
unsplit metallic bush;
Uncertainty of measure-
thermoplastic bush;
ment: 3110 % of the
thrust washer
tolerante.
Gauge,
Qgnotch h
Figure 20 Figure 21
Figure 22 Figure 23
Figure 24 Figure 25
12
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l.SO 12301 : 1992 (E)
6.6 Lubricant feed and distribution features
See table 10.
Table 10
Definition of geometrical characteristic Test method/measuring
Applicability
Test equipment
principle
to be measured
Element of lubricant feed and distribution features of half- Standard measuring Measuring device.
Thin-walled and thick-
methods.
walled half-bearing; bearing, bush and thrust washer (sec examples in figures
26 to 28; for more details see ISO 3547, ISO 3548, Standard test equipment.
wrapped bush; unsplit
metallic bush; thermo- ISO 6525 and ISO 6526).
Uncertainty of measure-
plastic bush; thrust
ment : ZL 10 % of the
washer
tolerante.
Gauge.
Figure 26
Oil hole
Oil groove
Figure 27
1)
Oil groove
Oil pocket
Figure 28
13
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ISO 12301 s: 1992 (E)
6.7 Surface conditions
See table 11.
Table 11
Definition of geometrical characteristic Test method/measuring
Applicability
Test equipment
principle
to be msasured
Surface roughness as defined in ISO 468. Test method in accordance Standard test
...