Plain bearings — Bearings with embedded solid lubricants

ISO 19259:2015 specifies a bearing with embedded solid lubricants which has been widely used as a solid lubricant bearing.

Paliers lisses — Paliers avec lubrifiants solide incorporé

General Information

Status
Withdrawn
Publication Date
16-Sep-2015
Withdrawal Date
16-Sep-2015
Current Stage
9599 - Withdrawal of International Standard
Start Date
21-Oct-2021
Completion Date
21-Oct-2021
Ref Project

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ISO 19259:2015 - Plain bearings -- Bearings with embedded solid lubricants
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INTERNATIONAL ISO
STANDARD 19259
First edition
2015-10-01
Plain bearings — Bearings with
embedded solid lubricants
Paliers lisses — Paliers avec lubrifiants solide incorporé
Reference number
ISO 19259:2015(E)
ISO 2015
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ISO 19259:2015(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2015, Published in Switzerland

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form

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copyright@iso.org
www.iso.org
ii © ISO 2015 – All rights reserved
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ISO 19259:2015(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Characteristics ........................................................................................................................................................................................................ 1

3.1 Structure ....................................................................................................................................................................................................... 1

3.2 Friction and wear characteristics ........................................................................................................................................... 2

3.3 Applicable field ....................................................................................................................................................................................... 3

4 Material .......................................................................................................................................................................................................................... 4

4.1 Metallic base body ................................................................................................................................................................................ 4

4.1.1 Copper alloy castings ................................................................................................................................................... 4

4.1.2 Grey cast irons ................................................................................................................................................................... 4

4.2 Solid lubricant.......................................................................................................................................................................................... 5

4.3 Combination of metallic base body and solid lubricant ...................................................................................... 5

5 Dimensions ................................................................................................................................................................................................................. 6

6 Assembling ................................................................................................................................................................................................................. 9

7 Surface finish ............................................................................................................................................................................................................ 9

Annex A (informative) Guide for selection of a bearing with embedded solid lubricants ........................10

Annex B (informative) Actual applications of a bearing with embedded solid lubricants .......................11

Bibliography .............................................................................................................................................................................................................................12

© ISO 2015 – All rights reserved iii
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ISO 19259:2015(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

committee has been established has the right to be represented on that committee. International

organizations, governmental 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.

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).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation on the meaning of ISO specific terms and expressions related to conformity

assessment, as well as information about ISO’s adherence to the WTO principles in the Technical

Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information.

The committee responsible for this document is ISO/TC 123, Plain bearings, Subcommittee SC 7, Special

types of plain bearings.
iv © ISO 2015 – All rights reserved
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INTERNATIONAL STANDARD ISO 19259:2015(E)
Plain bearings — Bearings with embedded solid lubricants
1 Scope

This International Standard specifies a bearing with embedded solid lubricants which has been widely

used as a solid lubricant bearing.
2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. For dated references, only the edition cited applies. For undated

references, the latest edition of the referenced document (including any amendments) applies.

ISO 185, Grey cast irons — Classification
3 Characteristics
3.1 Structure

A bearing with embedded solid lubricants is composed of a metallic base body supporting a load

and a solid lubricant embedded in holes or hollows formed on the surface of the metallic base body

giving lubricity. As to the embedded state of a solid lubricant, there is a plug type and a spiral type

(refer to Figure 1).

As for hole type, there are “through” or perforated ones and “bottomed” ones (refer to Figure 2).

This International Standard specifies a type which is most common and has been widely used where a

solid lubricant of a plug type is embedded in through holes. The International Standard also specifies a

cylindrical bush and a flanged bush (refer to Figure 3).
a) Plug type b) Spiral type
Figure 1 — Embedded state of solid lubricants on cylindrical bush
© ISO 2015 – All rights reserved 1
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ISO 19259:2015(E)
a) Through hole type b) Bottomed hole type
Key
1 metallic base body
2 hole
3 solid lubricant plug

Figure 2 — Structure of cross section on a bearing with embedded solid lubricants

a) Cylindrical bush b) Flanged bush
Figure 3 — Overview of a bearing with embedded solid lubricants (plug type)
3.2 Friction and wear characteristics

A bearing with embedded solid lubricants falls under the category of a solid lubricant bearing among

self-lubricating bearings. In the solid lubricant bearings, there is a solid type, a coated type, a dispersed

type, and an embedded type.

A solid type is such where a solid lubricant powder is solidified using pitch, resin or the like as a binder.

A coated type is such where a solid lubricant film is formed on a sliding surface by chemical or physical

means such as coating, baking, chemical reaction, or the like.

A dispersed type is such where a solid lubricant powder (fine particles) is dispersed into sintered metal

matrix or the like.
2 © ISO 2015 – All rights reserved
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ISO 19259:2015(E)

An embedded type is such as mentioned above where holes or hollows are formed on a sliding surface

of a metallic base body and solid lubricants are embedded therein and, since the load is supported by a

metallic base body, this type has excellent load carrying capacity.

The embedded solid lubricant supplies solid lubricant to the sliding surface and, when it slides on

the mating member, the solid lubricant is properly drawn out and spread over both sliding surfaces

whereupon a solid lubricant film is formed.

Further, even when the film is broken, the embedded solid lubricant is drawn out by friction onto the

sliding surfaces, so it repairs the film on the sliding surfaces whereby the lubrication is made possible

for long periods and long life is achieved (refer to Figure 4).

Since the types of metallic base body and solid lubricant can be appropriately selected depending upon

the operating conditions, a wide range of applications is possible. Moreover, bearings ranging from

small to large sizes can be manufactured.
3 1
Key
1 metallic base body
2 mating member
3 embedded solid lubricant
4 solid lubricant film
A sliding direction
Figure 4 — Lubricating mechanism of a bearing with embedded solid lubricants
3.3 Applicable field

The bearing can be used for rotational motion, reciprocating motion, oscillating motion, and frequent

start/stop cycles. The bearing is also used in such applications where no fluid lubrication can be expected

because of high load and low speed operation, and where the environment temperature is high.

Principally, the bearing can be used without supplying oil or grease. However, depending upon the

actual operating conditions, oil or grease may be supplied for a purpose of enhancement of durability,

removal of wear particulate or dust, and prevention of corrosion of the mating member.

© ISO 2015 – All rights reserved 3
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ISO 19259:2015(E)
4 Material
4.1 Metallic base body
Principal materia
...

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