ISO 16287:2021

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 16287
ISO/TC 123/SC 7
Plain bearings — Thermoplastic
Secretariat: JISC
bushes — Dimensions and tolerances
Voting begins on:
2020­12­29
Paliers lisses — Bagues thermoplastiques — Dimensions et tolérances
Voting terminates on:
2021­02­23
RECIPIENTS OF THIS DRAFT ARE INVITED TO
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OF ANY RELEVANT PATENT RIGHTS OF WHICH
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DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/FDIS 16287:2020(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN­
DARDS TO WHICH REFERENCE MAY BE MADE IN
©
NATIONAL REGULATIONS. ISO 2020

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ISO/FDIS 16287:2020(E)

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ii © ISO 2020 – All rights reserved

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ISO/FDIS 16287:2020(E)

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols . 1
5 Dimensions . 2
6 Material . 8
7 Design . 9
8 Testing . 9
8.1 General . 9
8.2 Outside diameter, D .
o 9
8.3 Inside diameter, D .
i 9
9 Assembling .10
10 Designation .11
Bibliography .13
© ISO 2020 – All rights reserved iii

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ISO/FDIS 16287:2020(E)

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
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organizations, governmental and non­governmental, 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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
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expressions related to conformity assessment, as well as information about ISO's adherence to the
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iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 123, Plain bearings, Subcommittee SC 7,
Special types of plain bearings.
This second edition cancels and replaces the first edition (ISO 16287:2005), which has been technically
revised. The main changes compared to the previous edition are as follows:
— Clause 3, “Terms and definitions”, has been added;
— Figures 2 and 3 have been revised.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2020 – All rights reserved

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FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 16287:2020(E)
Plain bearings — Thermoplastic bushes — Dimensions and
tolerances
1 Scope
This document specifies the dimensions and tolerances for inserted thermoplastic bushes used as
plain bearings with or without lubrication grooves in accordance with ISO 12128. These thermoplastic
bushes are dimensionally exchangeable to wrapped bushes according to ISO 3547-1.
This document is not applicable to reinforced plastics.
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 554, Standard atmospheres for conditioning and/or testing — Specifications
ISO 3547-2, Plain bearings — Wrapped bushes — Part 2: Test data for outside and inside diameters
ISO 6691, Thermoplastics polymers for plain bearings — Classification and designation
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
— IEC Electropedia: available at http:// www .electropedia .org/
4 Symbols
B nominal width of bush
B flange thickness
fl
C inside chamfer
i
C outside chamfer
o
D flange diameter
fl
D nominal housing bore diameter
H
D nominal inside diameter of the bush
i
D inside diameter of the bush when inserted in a ring gauge middle H7
i,ch
D nominal outside diameter of the bush
o
r radius for flange bushes
© ISO 2020 – All rights reserved 1

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ISO/FDIS 16287:2020(E)

5 Dimensions
The dimensions and tolerances of the thermoplastic bushes are shown in Figures 1 and 2, according to
whether cylindrical (type C) or flanged (type F), and given, in millimetres, in Tables 1, 2, 3 and 4. The
surface finishes x and y represented in Figures 1 and 2 are given in Table 5.
For the determination of the IT value (see ISO 286-1) of the coaxiality tolerance, the dimensions of D
o
are applicable.
For the determination of the IT value (ISO 286-1) of the axial run-out tolerance, the dimensions of D
fl
are applicable.
Figure 1 — Cylindrical bush
Figure 2 — Flanged bush
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ISO/FDIS 16287:2020(E)

Table 1 — Nominal sizes and limits for thick-walled bushes type C and type F
Dimensions in millimetres
b
D  C
o i
Limits for tolerance
d e a c
D group D B B C r
i fl fl o
(see Table 5)
nom. nom. A B d13 h13 h13 maximum maximum
6 10 12 +0,21 14 3 6 10 — 0,8 0,5
8 12 14 +0,07 18 3 6 10 15 0,8 0,5
10 14 16 20 3 6 10 15 0,8 0,5
+0,27
12 16 18 22 3 10 15 20 0,8 0,8
+0,09
14 18 20 25 3 10 15 20 0,8 0,8
15 18 21 27 3 10 15 20 0,8 0,8
+0,33
16 20 22 28 3 12 15 20 0,8 0,8
+0,11
18 22 24 30 3 12 20 30 0,8 0,8
20 24 26 32 3 15 20 30 1,5 0,8
22 26 28 +0,45 34 3 15 20 30 1,5 0,8
24 28 30 +0,15 36 3 15 20 30 1,5 0,8
25 30 32 38 4 20 30 40 1,5 0,8
28 34 36 42 4 20 30 40 2 0,8
+0,60
30 36 38 44 4 20 30 40 2 0,8
+0,20
32 38 40 zb11 46 4 20 30 40 2 0,8
35 41 45 50 5 30 40 50 2 0,8
+0,69
38 45 48 54 5 30 40 50 2 0,8
+0,23
40 48 50 58 5 30 40 60 2 0,8
42 50 52 60 5 30 40 60 2 0,8
45 53 55 63 5 30 40 60 2,5 0,8
+0,90
48 56 58 66 5 40 50 60 2,5 0,8
+0,30
50 58 60 68 5 40 50 60 2,5 0,8
55 63 65 73 5 40 50 70 2,5 0,8
60 70 75 83 7,5 40 60 80 2,5 0,8
65 75 80 88 7,5 50 60 80 2,5 2
70 80 85 95 7,5 50 70 90 2,5 2
75 85 90 100 7,5 50 70 90 2,5 2
80 90 95 105 7,5 60 80 100 2,5 2
85 95 100 110 7,5 60 80 100 2,5 2
90 105 110 120 10 60 80 120 2,5 2
95 110 115 125 10 60 100 120 2,5 2
100 115 120 130 10 80 100 120 2,5 2
f
105 120 125 135 10 80 100 120 2,5 2
110 125 130 140 10 80 100 120 2,5 2
120 135 140 150 10 100 120 150 2,5 2
130 145 150 160 10 100 120 150 3 2
140 155 160 za11 170 10 100 150 180 3 2
a
If it is necessary to use the non-standard width B, then these should be arranged to have a final digit of 0, 2, 5 or 8.
b
As an alternative to the chamfer C , a 45° angle may be used.
i
c
As an alternative to the chamfer C , a radius may be used.
o
d
Depending on the material, the wall thickness shall be rated so that the inside diameter D of the fitted bush is within the tolerance classes F10 to D12
i
respectively.
e
For D , the tolerance class d13 is preferred. Other tolerance class up to h13 are allowable and shall be subject to agreement between the manufacturer
fl
and the user.
f
To be agreed between the manufacturer and the user.
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ISO/FDIS 16287:2020(E)

Table 1 (continued)
b
D  C
o i
Limits for tolerance
d e a c
D group D B B C r
i fl fl o
(see Table 5)
nom. nom. A B d13 h13 h13 maximum maximum
150 165 170 180 10 120 150 180 3 2
160 180 185 200 12,5 120 150 180 3 2
170 190 195 210 12,5 120 180 200 3 2
180 200 210 220 15 150 180 250 3 2
190 210 220 230 15 150 180 250 3 2
200 220 230 240 15 180 200 250 3 2
a
If it is necessary to use the non-standard width B, then these should be arranged to have a final digit of 0, 2, 5 or 8.
b
As an alternative to the chamfer C , a 45° angle may be used.
i
c
As an alternative to the chamfer C , a radius may be used.
o
d
Depending on the material, the wall thickness shall be rated so that the inside diameter D of the fitted bush is within the tolerance classes F10 to D12
i
respectively.
e
For D , the tolerance class d13 is preferred. Other tolerance class up to h13 are allowable and shall be subject to agreement between the manufacturer
fl
and the user.
f
To be agreed between the manufacturer and the user.
Table 2 — Nominal sizes and limits for thin-walled cylindrical bushes type C
Dimensions in millimetres
b
D C
o i
d a c
D Limits for tolerance B C
i o
 group
 (see Table 5)
nom. nom. A B h13 maximum
6 8 +0,21 4 6 8 10 — —
...