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ASTM B438

Standard Specification for Bronze-Base Powder Metallurgy (PM) Bearings (Oil-Impregnated)

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Organization: ASTM
Publication Date: 1 April 2017
Status: active
Page Count: 26
ICS Code (Bearings in general): 21.100.01
scope:

This specification covers porous metallic sleeve, flange, thrust and spherical bronze-base bearings that are produced from mixed metal powders utilizing powder metallurgy (PM) technology and then impregnated with oil to supply operating lubrication.

Included are the specifications for the chemical, physical and mechanical requirements of those bronze-base PM materials that have been developed and standardized specifically for use in the manufacture of these self-lubricating bearings.

This specification is applicable to the purchase of bronze-base bearings (oil-impregnated) that were formerly covered by military specifications and are intended for government or military applications. Those additional government requirements that only apply to military bearings are listed in the Supplementary Requirements section of this specification.

This specification accompanies Specification B439 that covers the requirements for Iron-Base Powder Metallurgy (PM) Bearings, (Oil-Impregnated).

Typical applications for bronze-base bearings are listed in Appendix X1.

Bearing dimensional tolerance data are shown in Appendix X2, while engineering information regarding installation and operating parameters of PM bearings is included in Appendix X3. Additional useful information on selflubricating bearings can be found in MPIF Standard 35, ISO 5755 and the technical literature.2

With the exception of density values for which the g/cm3 unit is the industry standard, the values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

The following safety hazards caveat pertains only to the test methods described in this specification. 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.

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.

*A Summary of Changes section appears at the end of this standard

Document History

ASTM B438
April 1, 2017
Standard Specification for Bronze-Base Powder Metallurgy (PM) Bearings (Oil-Impregnated)
This specification covers porous metallic sleeve, flange, thrust and spherical bronze-base bearings that are produced from mixed metal powders utilizing powder metallurgy (PM) technology and then...
April 1, 2013
Standard Specification for Bronze-Base Powder Metallurgy (PM) Bearings (Oil-Impregnated)
This specification covers porous metallic sleeve, flange, thrust and spherical bronze-base bearings that are produced from mixed metal powders utilizing powder metallurgy (PM) technology and then...
June 1, 2008
Standard Specification for Bronze-Base Powder Metallurgy (PM) Bearings (Oil-Impregnated)
This specification covers porous metallic sleeve, flange, thrust and spherical bronze-base bearings that are produced from mixed metal powders utilizing powder metallurgy (PM) technology and then...
November 1, 2005
Standard Specification for Bronze Powder Metallurgy (P/M) Bearings (Oil-Impregnated)
This specification covers sintered bronze, oil-impregnated bearings made primarily from elemental copper, tin, lead, and graphite powders. The manufacturer may, at his discretion, use prealloyed...
April 1, 2004
Standard Specification for Sintered Bronze Bearings (Oil-Impregnated)
This specification covers sintered bronze, oil-impregnated bearings made primarily from elemental copper, tin, and graphite powders. The manufacturer may, at his discretion, use prealloyed bronze...
November 10, 2000
Standard Specification for Sintered Bronze Bearings (Oil-Impregnated)
This specification covers sintered bronze, oil-impregnated bearings made primarily from elemental copper, tin, and graphite powders. The manufacturer may, at his discretion, use prealloyed bronze...
May 1, 2000
Standard Specification for Sintered Bronze Bearings (Oil-Impregnated)
1. Scope 1.1 This specification covers sintered bronze, oil-impregnated bearings made primarily from elemental copper, tin, and graphite powders. The manufacturer may, at his discretion, use...
September 10, 1995
Standard Specification for Sintered Bronze Bearings (Oil-Impregnated)
A description is not available for this item.
September 10, 1995
Standard Specification for Sintered Bronze Bearings (Oil-Impregnated)
1. Scope 1.1 This specification covers sintered bronze, oil-impregnated bearings made primarily from elemental copper, tin, and graphite powders. The manufacturer may, at his discretion, use...
March 25, 1983
Standard Specification for SINTERED BRONZE BEARINGS (OIL IMPREGNATED)
This specification covers sintered bronze, oil-impregnated bearings made primarily from elemental copper, tin, lead, and graphite powders. The manufacturer may, at his discretion, use prealloyed...
March 25, 1983
STANDARD SPECIFICATION FOR SINTERED BRONZE BEARINGS (OIL- IMPREGNATED) (R 1989)
A description is not available for this item.
March 28, 1973
Standard Specification for Copper-Base Sintered Bearings (Oil-Impregnated)
A description is not available for this item.
November 1, 1967
Standard Specification for COPPER-BASE SINTERED METAL POWDER BEARINGS (OIL IMPREGNATED)
This specification covers copper-base sintered metal powder, oil impregnated, bearings of two compositions and three types depending on density. NOTE 1-The two compositions are intended to be...

References

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