ASTM B613-76(2000)

Standard Guide for Preparing Specifications for Miniature Brushes of Composite Materials for Sliding Electric Contacts

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 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 establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 31-Dec-1999
• ICS: 29.100.20 - Electrical and electromechanical components
• Technical Committee: B02 - Nonferrous Metals and Alloys
• Drafting Committee: B02.05 - Precious Metals and Electrical Contact Materials and Test Methods

Relations

• Replaced By: ASTM B613-76(2006) - Standard Guide for Preparing Specifications for Miniature Brushes of Composite Materials for Sliding Electric Contacts
• Effective Date: 01-Jun-2006
• Referred By: ASTM B692-18(2023) - Standard Specification for 75 % Silver-25 % Graphite Sliding Contact Material
• Effective Date: 01-Jan-2000
• Referred By: ASTM B664-18(2023) - Standard Specification for 80 % Silver-20 % Graphite Sliding Contact Material
• Effective Date: 01-Jan-2000

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: B 613 – 76 (Reapproved 2000)
Standard Guide for
Preparing Specifications for Miniature Brushes of
Composite Materials for Sliding Electric Contacts
This standard is issued under the fixed designation B 613; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope C64.1 Brushes for Electrical Machines
1.1 This guide defines the criteria for composition, proper-
3. Requirements
ties, and other requirements for brushes containing a matrix of
3.1 Composition—Each constituent should be listed indi-
one or more conducting metallic elements or alloys and one or
vidually by weight percent including tolerances if mutually
more lubricating lamellar solids.
agreed upon by producer and user. Any analytical technique
1.2 The resulting specification is intended for use where the
may be used as agreed upon between the producer and user.
size (for example, 5 by 3 by 2 mm), shape, or other factors
3.2 Density—Anapparentdensityforthematerialshouldbe
preclude the determination of properties on specimens of the
defined. The measurement and weight method defined by
bulk material from which individual brushes are made.
ANSI C64.1 is preferred.
1.3 The requirements recommended herein have been found
3.3 Resistivity—Theresistivityshouldbedefinedforatleast
to be desirable for most brush material composites. Care must
one axis. The procedure defined by ANSI C64.1 may need to
be taken in preparing a specification for a pre-existing material
be modified, as agreed upon between the producer and user, for
that imposition of one or more provisions herein does not alter
very small brushes.
the material or its performance.
3.4 Hardness—The bulk hardness of the brush material
1.4 This standard does not purport to address all of the
1 1
should be defined. Rockwell superficial hardness tests, ⁄8 or ⁄4
safety concerns, if any, associated with its use. It is the
in.-ball, (Test Methods E18) and Knoop, 500-g load (Test
responsibility of the user of this standard to establish appro-
Method E 384) have been used.
priate safety and health practices and determine the applica-
3.5 Strength—The strength of the brush material should be
bility of regulatory limitations prior to use.
defined. Transverse strength (ANSI C
...