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About This Item
Full Description
1.1 This specification covers porous metallic sleeve, flange, thrust, and spherical iron-base bearings that are produced from mixed metal powder utilizing powder metallurgy (PM) technology and then impregnated with oil to supply operating lubrication.
1.2 Included are the specifications for the chemical, physical, and mechanical requirements of those ferrous PM materials that have been developed and standardized specifically for use in the manufacture of these self-lubricating bearings.
1.3 This specification is a companion standard to Specification B 438/B 438M that covers the requirements for Bronze-Base Powder Metallurgy (PM) Bearings (Oil-Impregnated).
1.4 Typical applications for iron-base bearings are discussed in .
1.5 Commercial bearing dimensional tolerance data are shown in , while engineering information regarding installation and operating parameters of PM bearings is included in . Additional useful information on self-lubricating bearings can be found in MPIF Standard 35 (Bearings) and the technical literature.
1.6 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 SI equivalents of inch-pound units, shown in parenthesis, have been converted in accordance with IEEE/ASTM Standard SI 10, may be approximate and are only for information.
1.7 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.
Document History
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ASTM B439-21
Standard Specification for Iron-Base Powder Metallurgy (PM) Bearings (Oil-Impregnated)- Most Recent
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ASTM B439-18
Standard Specification for Iron-Base Powder Metallurgy (PM) Bearings (Oil-Impregnated)- Historical Version
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ASTM B439-12
Standard Specification for Iron-Base Powder Metallurgy (PM) Bearings (Oil-Impregnated)- Historical Version
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ASTM B439-08
Standard Specification for Iron-Base Powder Metallurgy (PM) Bearings (Oil-Impregnated)- Historical Version
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ASTM B439-07
Standard Specification for Iron-Base Powder Metallurgy (PM) Bearings (Oil Impregnated)- Historical Version
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ASTM B439-06
viewing
Standard Specification for Iron-Base Powder Metallurgy (PM) Bearings (Oil Impregnated)- Historical Version
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ASTM B439-00e1
Standard Specification for Iron-Base Sintered Bearings (Oil-Impregnated)- Historical Version
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ASTM B439-00
Standard Specification for Iron-Base Sintered Bearings (Oil-Impregnated)- Historical Version