ASTM B439-06

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

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    1. Scope

    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.

    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    B243 Terminology of Powder Metallurgy

    B438 Specification for Bronze-Base Powder Metallurgy (PM) Bearings (Oil-Impregnated)

    B939 Test Method for Radial Crushing Strength, K, of Powder Metallurgy (PM) Bearings and Structural Materials

    B962 Test Methods for Density of Compacted or Sintered Powder Metallurgy (PM) Products Using Archimedes Principle

    B963 Test Methods for Oil Content, Oil-Impregnation Efficiency, and Surface-Connected Porosity of Sintered Powder Metallurgy (PM) Products Using Archimedes Principle

    E9 Test Methods of Compression Testing of Metallic Materials at Room Temperature

    E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications

    E1019 Test Methods for Determination of Carbon, Sulfur, Nitrogen, and Oxygen in Steel, Iron, Nickel, and Cobalt Alloys by Various Combustion and Fusion Techniques

    ICS Code

    ICS Number Code 21.100.10 (Plain bearings)

    UNSPSC Code

    UNSPSC Code 23271805(Iron powder); 31171500(Bearings)

    Referencing This Standard
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    DOI: 10.1520/B0439-06

    Citation Format

    ASTM B439-06, Standard Specification for Iron-Base Powder Metallurgy (PM) Bearings (Oil Impregnated), ASTM International, West Conshohocken, PA, 2006,

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