ASTM B613-76(2006)
(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.
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) for this product/material as provided by the manufacturer, to establish appropriate safety and health practices, and determine the applicability of regulatory limitations prior to use.
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Standards Content (Sample)
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Designation: B613 – 76 (Reapproved 2006)
Standard Guide for
Preparing Specifications for Miniature Brushes of
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 E384 Test Method for Microindentation Hardness of Mate-
rials
1.1 This guide defines the criteria for composition, proper-
2.2 ANSI Standard:
ties, and other requirements for brushes containing a matrix of
C64.1 Brushes for Electrical Machines
one or more conducting metallic elements or alloys and one or
more lubricating lamellar solids.
3. Requirements
1.2 The resulting specification is intended for use where the
3.1 Composition—Each constituent should be listed indi-
size (for example, 5 by 3 by 2 mm), shape, or other factors
vidually by weight percent including tolerances if mutually
preclude the determination of properties on specimens of the
agreed upon by producer and user. Any analytical technique
bulk material from which individual brushes are made.
may be used as agreed upon between the producer and user.
1.3 The requirements recommended herein have been found
3.2 Density—Anapparentdensityforthematerialshouldbe
to be desirable for most brush material composites. Care must
defined. The measurement and weight method defined by
be taken in preparing a specification for a pre-existing material
ANSI C64.1 is preferred.
that imposition of one or more provisions herein does not alter
3.3 Resistivity—Theresistivityshouldbedefinedforatleast
the material or its performance.
one axis. The procedure defined by ANSI C64.1 may need to
1.4 The values stated in SI units are to be regarded as
be modified, as agreed upon between the producer and user, for
standard. No other units of measurement are included in this
very small brushes.
standard.
3.4 Hardness—The bulk hardness of the brush material
1.5 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 become familiar
Method E384) have been used.
with all hazards including those identified in the appropriate
3.5 Strength—The strength of the brush material should be
Material Safety Data Sheet (MSDS) for this product/material
defined. Transverse strength (ANSI C64.1) may be used when
as provided by the manufacturer, to establish appropriate
the brushes
...
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