ASTM F2953-12(2021)

Standard Specification for Phenolic Raw Materials for the Use in Bearing Cages

SCOPE
1.1 This specification covers basic characteristics required for porous laminated phenolic materials intended for use as instrument and thin-section ball-bearing retainers (cages) and the methods of determining these characteristics.  
1.2 Forms—Sheets, rolled tubes, molded tubes, and rods are recommended forms of laminated material covered by this specification.  
1.3 Intended Use—Materials produced to this specification are intended for use as ball-bearing retainers (cages). Temperature range is limited to 250 °F (117 °C) and below.  
1.4 Units—The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered 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 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.

General Information

• Status: Published
• Publication Date: 14-Jan-2021
• ICS: 21.100.20 - Rolling bearings
• Technical Committee: F34 - Rolling Element Bearings
• Drafting Committee: F34.06 - Aerospace

Standards Content (Sample)

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.
Designation:F2953 −12 (Reapproved 2021)
Standard Specification for
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Phenolic Raw Materials for the Use in Bearing Cages
This standard is issued under the fixed designation F2953; 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 D792 Test Methods for Density and Specific Gravity (Rela-
tive Density) of Plastics by Displacement
1.1 This specification covers basic characteristics required
D2304 Test Method for Thermal Endurance of Rigid Elec-
for porous laminated phenolic materials intended for use as
trical Insulating Materials
instrument and thin-section ball-bearing retainers (cages) and
E11 Specification for Woven Wire Test Sieve Cloth and Test
the methods of determining these characteristics.
Sieves
1.2 Forms—Sheets, rolled tubes, molded tubes, and rods are
3
2.2 ANSI/ASQC Standard:
recommended forms of laminated material covered by this
ANSI/ASQC Z1.4 Sampling Procedures and Tables for In-
specification.
spection by Attributes
4
1.3 Intended Use—Materials produced to this specification
2.3 Federal Standard:
are intended for use as ball-bearing retainers (cages).Tempera-
MIL-STD-129 Military Making for Shipment and Storage
ture range is limited to 250 °F (117 °C) and below.
3. Classification
1.4 Units—The values stated in inch-pound units are to be
3.1 The material shall be furnished in the following types
regarded as the standard. The values given in parentheses are
and forms as specified:
mathematical conversions to SI units that are provided for
information only and are not considered standard. Type Description
2 2
FB Rolled tube made from cotton fabric weighing 4 oz/yd (0.14 kg/m )
1.5 This standard does not purport to address all of the
or less, with a nominal thread count of 80 by 80 threads per inch
safety concerns, if any, associated with its use. It is the (31.5 cm by 31.5 cm).
2 2
FBFW Rolled tube made from cotton fabric weighing 4 oz/yd (0.14 kg/m )
responsibility of the user of this standard to establish appro-
or less, with a nominal thread count of 100 by 100 threads per inch
priate safety, health, and environmental practices and deter-
(39.4 cm by 39.4 cm).
2 2
mine the applicability of regulatory limitations prior to use. FBEFW Rolled tube made from cotton fabric weighing 3 oz/yd (0.1 kg/m)or
less, with a nominal thread count of 130 by 130 threads per in.
1.6 This international standard was developed in accor-
(51.2 cm by 51.2 cm).
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
4. Ordering Information
Development of International Standards, Guides and Recom-
4.1 Procurement documents should specify the following:
mendations issued by the World Trade Organization Technical
4.1.1 Title, designation, and date of this specification;
Barriers to Trade (TBT) Committee.
4.1.2 Type required (see Section 3); Property values for
tubes (see Table 1);
2. Referenced Documents
4.1.3 Dimensions required; and
2
2.1 ASTM Standards:
4.1.4 Special marking required (see 9.2).
D299 Specification for Asbestos Yarns
4.2 Required test data shall be requested at the time the
D618 Practice for Conditioning Plastics for Testing
purchase order is submitted and listed on the purchase order.
D695 Test Method for Compressive Properties of Rigid
Plastics
5. Order of Precedence
5.1 In the event of a conflict between the text of this
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This specification is under the jurisdiction ofASTM Committee F34 on Rolling
specification and references cited herein, the text of this
Element Bearings and is the direct responsibility of Subcommittee F34.06 on
specification takes precedence. Nothing in this specification,
Aerospace.
Current edition approved Jan. 15, 2021. Published February 2021. Originally
approved in 2012. Last previous edition approved in 2012 as F2953–12. DOI:
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10.1520/F2953–12R21. Available from American Society for Quality (ASQ), 600 N. Plankinton Ave.,
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Milwaukee, WI 53203, http://www.asq.org.
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contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM AvailablefromU.S.GovernmentPrintingOfficeSuperintendentofDocuments,
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the ASTM website. www.access.gpo.gov.
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