ISO 20054:2022

Plain bearings — Bearings containing dispersed solid lubricants

This document specifies the characteristics, materials, dimensions, assembly and surface finish for a bearing containing dispersed solid lubricants which is used as a solid lubricant bearing. NOTE In the solid lubricant bearing among self-lubricating bearings there is a solid type, a coated type, an embedded type and a dispersed type, which is specified by this document.

Paliers lisses — Paliers contenant des lubrifiants solides dispersés

General Information

• Status: Published
• Publication Date: 23-Jun-2022
• ICS: 21.100.10 - Plain bearings
• Technical Committee: ISO/TC 123/SC 7 - Special types of plain bearings
• Drafting Committee: ISO/TC 123/SC 7 - Special types of plain bearings
• Current Stage: 6060 - International Standard published
• Start Date: 24-Jun-2022
• Due Date: 22-Jun-2023
• Completion Date: 24-Jun-2022

Relations

• Revises: ISO 20054:2016 - Plain bearings — Bearings containing dispersed solid lubricants
• Effective Date: 06-Jun-2022

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 20054
Second edition
2022-06
Plain bearings — Bearings containing
dispersed solid lubricants
Paliers lisses — Paliers contenant des lubrifiants solides dispersés
Reference number
ISO 20054:2022(E)
© ISO 2022

---------------------- Page: 1 ----------------------
ISO 20054:2022(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2022
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
  © ISO 2022 – All rights reserved

---------------------- Page: 2 ----------------------
ISO 20054:2022(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and units. 1
5 Characteristics . 1
5.1 Structure . 1
5.2 Lubricating mechanism . 3
5.3 Applicable field . 3
6 Material. 3
6.1 Metal matrix . 3
6.2 Solid lubricant . 4
6.3 Combination of metal matrix and solid lubricant. 4
7 Dimension . 5
7.1 General . 5
7.2 General dimension . 5
7.2.1 Seamless bush . 5
7.2.2 Wrapped bush . 7
7.3 Tolerance classes and limit deviations . 7
7.3.1 General . 7
7.3.2 Bearing fit . 7
7.3.3 Bearing clearance . 7
8 Assembling . 8
9 Surface finish .8
Annex A (informative) Guidance for selection of a bearing metal matrix for bearings
containing dispersed solid lubricants . 9
Annex B (informative) Actual applications of a bearing containing dispersed solid
lubricants .10
Bibliography .11
iii
© ISO 2022 – All rights reserved

---------------------- Page: 3 ----------------------
ISO 20054:2022(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 of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/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 20054:2016), of which it constitutes a
minor revision.
The main changes are as follows:
— the titles of 5.2, 7.3.2 and 7.3.3 have been changed to more suitable ones;
— changes in the description in 7.1 have been made due to the above changes.
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 2022 – All rights reserved

---------------------- Page: 4 ----------------------
INTERNATIONAL STANDARD ISO 20054:2022(E)
Plain bearings — Bearings containing dispersed solid
lubricants
1 Scope
This document specifies the characteristics, materials, dimensions, assembly and surface finish for a
bearing containing dispersed solid lubricants which is used as a solid lubricant bearing.
NOTE In the solid lubricant bearing among self-lubricating bearings there is a solid type, a coated type, an
embedded type and a dispersed type, which is specified by this document.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
4 Symbols and units
See Table 1.
Table 1 — Symbols and units
Symbol Description Unit
B Width of the bush mm
D Inside diameter of the bush mm
i
D Outside diameter of the bush mm
o
x Surface roughness —
5 Characteristics
5.1 Structure
A bearing containing dispersed solid lubricants is made of sintered composite materials that contain
solid lubricants dispersed uniformly in the metal matrix and is manufactured by powder metallurgy
(see Figure 1).
This document includes multi-layered bearings with the sintered layer on a steel backing and both
seamless and wrapped bushes (see Figure 2).
Figure 3 shows a typical microstructure of the bearings containing dispersed solid lubricants. The
dispersed solid lubricants in the metal matrix vary in grain size and volume.
1
© ISO 2022 – All rights reserved

---------------------- Page: 5 ----------------------
ISO 20054:2022(E)
a) Seamless bush — Fine solid lubricants type b) Seamless bush — Coarse solid lubricants
type
Figure 1 — Overview of bearings containing dispersed solid lubricants that are single-layered
a) Seamless bush b) Wrapped bush
Key
1 sintered layer
2 steel backing
Figure 2 — Overview of bearings containing dispersed solid lubricants that are multi-layered
a) Fine solid lubricants type b) Coarse solid lubricants type
Key
1 metal matrix
2 dispersed solid lubricant
Figure 3 — Microstructure of a bearing containing dispersed solid lubricants
2
  © ISO 2022 – All rights reserved

---------------------- Page: 6 ----------------------
ISO 20054:2022(E)
5.2 Lubricating mechanism
A bearing containing dispersed solid lubricants obtains its sliding performance from the self-lubricating
effects of solid lubricants and the mechanical strength of metal matrix.
The sliding performance and mechanical strength vary according to the volume of solid lubricants.
Higher sliding performance requires more solid lubricants, while higher mechanical strength requires
less solid lubricants.
Since solid lubricants are dispersed over the entire material, the bearings are particularly suitable for
extra low speed or micro-motion applications, minimising static friction to achieve smooth sliding at
the start of motion.
The solid lubricants are drawn out over both surfaces from the bearing material when it slides
against the mating surface, forming a solid lubricant film. As the solid lubricant film is consumed, it is
replenished from the bearing material to maintain a continuous film throughout the life of the product
(see Figure 4).
Key
1 mating member 3 dispersed solid lubricant
2 metal matrix 4 solid lubricant film
a
Sliding direction.
Figure 4 — Lubricating mechanism of a bearing containing dispersed solid lubricants
5.3 Applicable field
The bearing can
...

ISO/FDIS 20054:####(X:2022(E)
ISO TC 123/SC 7
Date: YYYY-MM-DD
Plain bearings — Bearings containing dispersed solid lubricants

FDIS stage

Warning for WDs and CDs
This document is not an ISO International Standard. It is distributed for review and comment. It is subject to
change without notice and may not be referred to as an International Standard.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of
which they are aware and to provide supporting documentation.


A model manuscript of a draft International Standard (known as “The Rice Model”) is available at

© ISO #### – All rights reserved

---------------------- Page: 1 ----------------------
© ISO 20XX
Paliers lisses — Paliers contenant des lubrifiants solides dispersés
Second edition
Date: 2022-03-01

---------------------- Page: 2 ----------------------
ISO/FDIS 20054:2022(E)
© ISO 2022
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part
of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or
mechanical, including photocopying, or posting on the internet or an intranet, without prior written
permission. Permission can be requested from either ISO at the address below or ISO’s member body
in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.orgwww.iso.org
Published in Switzerland
iv © ISO 2022 – All rights reserved

---------------------- Page: 3 ----------------------
ISO/FDIS 20054:2022(E)
Contents
Foreword . iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and units . 1
5 Characteristics . 1
5.1 Structure . 1
5.2 Lubricating mechanism . 2
5.3 Applicable field . 3
6 Material . 3
6.1 Metal matrix . 3
6.2 Solid lubricant . 4
6.3 Combination of metal matrix and solid lubricant . 5
7 Dimension . 5
7.1 General . 5
7.2 General dimension . 6
7.2.1 Seamless bush . 6
7.2.2 Wrapped bush . 7
7.3 Tolerance classes and limit deviations . 7
7.3.1 General . 7
7.3.2 Bearing fit . 7
7.3.3 Bearing clearance . 7
8 Assembling . 8
9 Surface finish . 8
Annex A (informative) Guidance for selection of a bearing metal matrix for bearings
containing dispersed solid lubricants . 9
Annex B (informative) Actual applications of a bearing containing dispersed solid
lubricants . 10
Bibliography . 11
© ISO 2022 – All rights reserved v

---------------------- Page: 4 ----------------------
ISO/FDIS 20054:2022(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 of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the World
Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/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 20054:2016), of which it constitutes a
minor revision.
The main changes are as follows:
— the titles of 5.2, 7.3.2 and 7.3.3 were changed to more suitable ones. In addition, changes in the
description in 7.1 due to those changes were conducted.
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.
vi © ISO 2022 – All rights reserved

---------------------- Page: 5 ----------------------
FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 20054:2022(E)

Plain bearings — Bearings containing dispersed solid lubricants
1 Scope
This document specifies the characteristics, materials, dimensions, assembly and surface finish for a
bearing containing dispersed solid lubricants which is used as a solid lubricant bearing.
NOTE In the solid lubricant bearing among self-lubricating bearings there is a solid type, a coated type, an
embedded type and a dispersed type, which is specified by this document.
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 3547-1, Plain bearings — Wrapped bushes — Part 1: Dimensions
There are no normative references in this document.
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/
4 Symbols and units
See Table 1.
Table 1 — Symbols and units
Symbol Description Unit
B Width of the bush mm
Di Inside diameter of the bush mm
D Outside diameter of the bush mm
o
x Surface roughness
—
© ISO 2022 – All rights reserved 1

---------------------- Page: 6 ----------------------
ISO/FDIS 20054:2022(E)
5 Characteristics
5.1 Structure
A bearing containing dispersed solid lubricants is made of sintered composite materials that contain solid
lubricants dispersed uniformly in the metal matrix and is manufactured by powder metallurgy (see
Figure 1).
This document includes multi-layered bearings with the sintered layer on a steel backing and both
seamless and wrapped bushes (see Figure 2).
Figure 3 shows a typical microstructure of the bearings containing dispersed solid lubricants. The
dispersed solid lubricants in the metal matrix vary in grain size and volume.


b) Seamless bush
a) Seamless bush

(coarse solid lubricants type)
(fine solid lubricants type)

a) Seamless bush — Fine solid lubricants type b) Seamless bush — Coarse solid
lubricants type
Figure 1 — — Overview of bearings containing dispersed solid lubricants (that are single-
layered)


a) Seamless bush
b) Wrapped bush
2 © ISO 2022 – All rights reserved

---------------------- Page: 7 ----------------------
ISO/FDIS 20054:2022(E)


a) Seamless bush b) Wrapped bush
Key
1 sintered layer
2 steel backing
Figure 2 — — Overview of bearings containing dispersed solid lubricants (that are multi-
layered)

a) Fine solid lubricants type
b) Coarse solid lubricants type

a) Fine solid lubricants type b) Coarse solid lubricants type
Key
1 metal matrix
2 dispersed solid lubricant
Figure 3 — — Microstructure of a bearing containing dispersed solid lubricants
© ISO 2022 – All rights reserved 3

---------------------- Page: 8 ----------------------
ISO/FDIS 20054:2022(E)
5.2 Lubricating mechanism
A bearing containing dispersed solid lubricants obtains its sliding performance from the self-lubricating
effects of solid lubricants and the mechanical strength of metal matrix.
The sliding performance and mechanical strength vary according to the volume of solid lubricants. Higher
sliding performance requires more solid lubricants, while higher mechanical strength requires less solid
lubricants.
Since solid lubricants are dispersed over the entire material, the bearings are particularly suitable for
extra low speed or micro-motion applications, minimising static friction to achieve smooth sliding at the
start of motion.
The solid lubricants are drawn out over both surfaces from the bearing material when it slides against
the mating surface, forming a solid lubricant film. As the solid lubricant film is consumed, it is replenished
from the bearing material to maintain a continuous film throughout the life of the product (see Figure 4).


Key
1 mating member
2 metal matrix
1 mating member 3 dispersed solid lubricant
Inserted Cells
2 metal matrix 4 solid lubricant film
Inserted Cells
a
Sliding direction.
Inserted Cells
Figure 4 — — Lubricating mechanism of a bearing containing dispersed solid lubricants
Inserted Cells
5.3 Applicable field
The bearing can be used for rotational motion, reciprocating motion, oscillating motion and frequent
start/stop cycles. The bearing is a
...

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 20054
ISO/TC 123/SC 7
Plain bearings — Bearings containing
Secretariat: JISC
dispersed solid lubricants
Voting begins on:
2022-03-17
Paliers lisses — Paliers contenant des lubrifiants solides dispersés
Voting terminates on:
2022-05-12
RECIPIENTS OF THIS DRAFT ARE INVITED TO
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/FDIS 20054:2022(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 2022

---------------------- Page: 1 ----------------------
ISO/FDIS 20054:2022(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2022
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
  © ISO 2022 – All rights reserved

---------------------- Page: 2 ----------------------
ISO/FDIS 20054:2022(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and units. 1
5 Characteristics . 1
5.1 Structure . 1
5.2 Lubricating mechanism . 3
5.3 Applicable field . 3
6 Material. 3
6.1 Metal matrix . 3
6.2 Solid lubricant . 4
6.3 Combination of metal matrix and solid lubricant. 4
7 Dimension . 5
7.1 General . 5
7.2 General dimension . 5
7.2.1 Seamless bush . 5
7.2.2 Wrapped bush . 7
7.3 Tolerance classes and limit deviations . 7
7.3.1 General . 7
7.3.2 Bearing fit . 7
7.3.3 Bearing clearance . 7
8 Assembling . 8
9 Surface finish .8
Annex A (informative) Guidance for selection of a bearing metal matrix for bearings
containing dispersed solid lubricants . 9
Annex B (informative) Actual applications of a bearing containing dispersed solid
lubricants .10
Bibliography .11
iii
© ISO 2022 – All rights reserved

---------------------- Page: 3 ----------------------
ISO/FDIS 20054:2022(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 of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/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 20054:2016), of which it constitutes a
minor revision.
The main changes are as follows: the titles of 5.2, 7.3.2 and 7.3.3 were changed to more suitable ones. In
addition, changes in the description in 7.1 due to those changes were conducted.
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 2022 – All rights reserved

---------------------- Page: 4 ----------------------
FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 20054:2022(E)
Plain bearings — Bearings containing dispersed solid
lubricants
1 Scope
This document specifies the characteristics, materials, dimensions, assembly and surface finish for a
bearing containing dispersed solid lubricants which is used as a solid lubricant bearing.
NOTE In the solid lubricant bearing among self-lubricating bearings there is a solid type, a coated type, an
embedded type and a dispersed type, which is specified by this document.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
4 Symbols and units
See Table 1.
Table 1 — Symbols and units
Symbol Description Unit
B Width of the bush mm
D Inside diameter of the bush mm
i
D Outside diameter of the bush mm
o
x Surface roughness —
5 Characteristics
5.1 Structure
A bearing containing dispersed solid lubricants is made of sintered composite materials that contain
solid lubricants dispersed uniformly in the metal matrix and is manufactured by powder metallurgy
(see Figure 1).
This document includes multi-layered bearings with the sintered layer on a steel backing and both
seamless and wrapped bushes (see Figure 2).
Figure 3 shows a typical microstructure of the bearings containing dispersed solid lubricants. The
dispersed solid lubricants in the metal matrix vary in grain size and volume.
1
© ISO 2022 – All rights reserved

---------------------- Page: 5 ----------------------
ISO/FDIS 20054:2022(E)
a) Seamless bush — Fine solid lubricants type b) Seamless bush — Coarse solid lubricants
type
Figure 1 — Overview of bearings containing dispersed solid lubricants that are single-layered
a) Seamless bush b) Wrapped bush
Key
1 sintered layer
2 steel backing
Figure 2 — Overview of bearings containing dispersed solid lubricants that are multi-layered
a) Fine solid lubricants type b) Coarse solid lubricants type
Key
1 metal matrix
2 dispersed solid lubricant
Figure 3 — Microstructure of a bearing containing dispersed solid lubricants
2
  © ISO 2022 – All rights reserved

---------------------- Page: 6 ----------------------
ISO/FDIS 20054:2022(E)
5.2 Lubricating mechanism
A bearing containing dispersed solid lubricants obtains its sliding performance from the self-lubricating
effects of solid lubricants and the mechanical strength of metal matrix.
The sliding performance and mechanical strength vary according to the volume of solid lubricants.
Higher sliding performance requires more solid lubricants, while higher mechanical strength requires
less solid lubricants.
Since solid lubricants are dispersed over the entire material, the bearings are particularly suitable for
extra low speed or micro-motion applications, minimising static friction to achieve smooth sliding at
the start of motion.
The solid lubricants are drawn out over both surfaces from the bearing material when it slides
against the mating surface, forming a solid lubricant film. As the solid lubricant film is consumed, i
...