ASTM B613-17
(Guide)Standard Guide for Preparing Specifications for Miniature Brushes of Composite Materials for Sliding Electric Contacts
Standard Guide for Preparing Specifications for Miniature Brushes of Composite Materials for Sliding Electric Contacts
ABSTRACT
This guide defines the criteria for composition, properties, and other requirements for miniature brushes of composite materials containing a matrix of one or more conducting metallic elements or alloys and one or more lubricating lamellar solids intended for sliding electric contacts. Each constituent of the material should be listed individually by weight percent including tolerances using any analytical technique while the apparent density for the material should be defined using the measurement and weight method. The resistivity; Rockwell superficial hardness, transverse strength, and shear strength; and microstructural properties such as cracks and defects should also be defined and should conform to the required electrical, mechanical, and structural properties of the brush materials.
SCOPE
1.1 This guide defines the criteria for composition, properties, and other requirements for brushes containing a matrix of one or more conducting metallic elements or alloys and one or more lubricating lamellar solids.
1.2 The resulting specification is intended for use where the size (for example, 5 by 3 by 2 mm), shape, or other factors preclude the determination of properties on specimens of the bulk material from which individual brushes are made.
1.3 The requirements recommended herein have been found to be desirable for most brush material composites. Care must be taken in preparing a specification for a pre-existing material that imposition of one or more provisions herein does not alter the material or its performance.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to become familiar with all hazards including those identified in the appropriate Safety Data Sheet (SDS) for this product/material as provided by the manufacturer, to establish appropriate safety, health, and environmental practices, and determine the applicability of regulatory limitations prior to use.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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Designation: B613 − 17
Standard Guide for
Preparing Specifications for Miniature Brushes of
1
Composite Materials for Sliding Electric Contacts
This standard is issued under the fixed designation B613; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 2. Referenced Documents
2
1.1 This guide defines the criteria for composition, 2.1 ASTM Standards:
properties, and other requirements for brushes containing a E18 Test Methods for Rockwell Hardness of Metallic Ma-
matrix of one or more conducting metallic elements or alloys terials
and one or more lubricating lamellar solids. E384 Test Method for Microindentation Hardness of Mate-
rials
1.2 The resulting specification is intended for use where the
2.2 NEMA Standard:
size (for example, 5 by 3 by 2 mm), shape, or other factors
3
CB-1 Brushes for Electrical Machines
preclude the determination of properties on specimens of the
bulk material from which individual brushes are made.
3. Requirements
1.3 The requirements recommended herein have been found
3.1 Composition—Each constituent should be listed indi-
to be desirable for most brush material composites. Care must
vidually by weight percent including tolerances if mutually
be taken in preparing a specification for a pre-existing material
agreed upon by producer and user. Any analytical technique
that imposition of one or more provisions herein does not alter
may be used as agreed upon between the producer and user.
the material or its performance.
3.2 Density—An apparent density for the material should be
1.4 The values stated in SI units are to be regarded as
defined. The measurement and weight method defined by
standard. No other units of measurement are included in this
NEMA CB-1 is preferred.
standard.
3.3 Resistivity—The resistivity should be defined for at least
1.5 This standard does not purport to address all of the
one axis. The procedure defined by NEMA CB-1 may need to
safety concerns, if any, associated with its use. It is the
be modified, as agreed upon between the producer and user, for
responsibility of the user of this standard to become familiar
very small brushes.
with all hazards including those identified in the appropriate
Safety Data Sheet (SDS) for this product/material as provided
3.4 Hardness—The bulk hardness of the brush material
1 1
by the manufacturer, to establish appropriate safety, health,
should be defined. Rockwell superficial hardness tests, ⁄8 or ⁄4
and environmental practices, and determine the applicability
in.-ball, (Test Methods E18) and Knoop, 500-g load (Test
of regulatory limitations prior to use.
Method E384) have been used.
1.6 This international standard was developed in accor-
3.5 Strength—The strength of the brush material should be
dance with internationally recognized principles on standard-
defined. Transvers
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: B613 − 76 (Reapproved 2012) B613 − 17
Standard Guide for
Preparing Specifications for Miniature Brushes of
1
Composite Materials for Sliding Electric Contacts
This standard is issued under the fixed designation B613; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This guide defines the criteria for composition, properties, and other requirements for brushes containing a matrix of one
or more conducting metallic elements or alloys and one or more lubricating lamellar solids.
1.2 The resulting specification is intended for use where the size (for example, 5 by 3 by 2 mm), shape, or other factors preclude
the determination of properties on specimens of the bulk material from which individual brushes are made.
1.3 The requirements recommended herein have been found to be desirable for most brush material composites. Care must be
taken in preparing a specification for a pre-existing material that imposition of one or more provisions herein does not alter the
material or its performance.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to become familiar with all hazards including those identified in the appropriate Material Safety Data
Sheet (MSDS)(SDS) for this product/material as provided by the manufacturer, to establish appropriate safety safety, health, and
healthenvironmental practices, and determine the applicability of regulatory limitations prior to use.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
E18 Test Methods for Rockwell Hardness of Metallic Materials
E384 Test Method for Microindentation Hardness of Materials
2.2 ANSINEMA Standard:
3
C64.1CB-1 Brushes for Electrical Machines
3. Requirements
3.1 Composition—Each constituent should be listed individually by weight percent including tolerances if mutually agreed upon
by producer and user. Any analytical technique may be used as agreed upon between the producer and user.
3.2 Density—An apparent density for the material should be defined. The measurement and weight method defined by ANSI
C64.1NEMA CB-1 is preferred.
3.3 Resistivity—The resistivity should be defined for at least one axis. The procedure defined by ANSI C64.1NEMA CB-1 may
need to be modified, as agreed upon between the producer and user, for very small b
...
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