This specification covers iron-base sintered metal powder, oil-impregnated bearings. Formerly under the jurisdiction of Committee B09 on Metal Powders and Metal Powder Products, this specification was withdrawn in January 2007. The content of this specification has been incorporated into the 2006 version of B 439 on Iron-Base Powder Metallurgy (PM) Bearings (Oil Impregnated).

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1.1 This specification covers iron-base sintered metal powder, oil-impregnated bearings. There are two grades, depending on the level of combined carbon (see Table 1):

1.1.1 Grade 1, Iron Graphite -low combined carbon, and

1.1.2 Grade 2, Iron Graphite -high combined carbon.

1.2 The values stated in inch-pound units are the standard. The metric equivalents of inch-pound units may be approximate.

Note 1--Definitions of powder metallurgy terms can be found in Definitions B243. Additional useful information is available in the Related Material section of Vol 02.05 of the Annual Book of ASTM Standards .

Note 2--Information on design, permissible loads, dimensional tolerances, and recommended press fits and running clearances are provided in Appendix X1.