ASTM B438 PDF

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ASTM B Standard Specification for Bronze-Base Powder Metallurgy (PM) Bearings (Oil-Impregnated). ASTM – B, Grade 1, Type II; MPIF – CTK26; Military – MIL-BD, Type I, Grade I (this spec only applies to Bushings & Washers. It must be requested. ASTM – B, Grade 1, Type II. Military – MIL-BD, Type I, Comp. A. MPIF – CTK Heavy industry uses Sintered Bronze as machinery components.

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Therefore, only minimum recommended clearances are listed in Table X1.

ASTM B / BM – 05 Specification for Bronze Powder Metallurgy (P/M) Bearing (Oil-Impregnated)

Special Tolerancein. 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 abstract is a brief summary of the referenced standard.

Reference military standard speci?

Current edition approved Nov. B Outside diameter tolerances are the same as for? Individual reprints single or multiple copies of this standard may be obtained by ashm ASTM at the above address or at phonefaxor service astm. A representative sample of chips may be obtained by milling, drilling,? This calculated value will be the minimum acceptable breaking load for that speci? Thanks for contacting us. B43 point at which the load Copyright? Then, using the minimum radial crushing n438 for the grade and type of oil-impregnated bearing material from Table 5 for K in the breaking load formula and the measured dimensions of the body, a Pmin value may be calculated.

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Last previous edition approved in as B — 00a. The Government reserves the right to perform an inspection set forth herein to assure supplies and sources conform to the prescribed requirements.

Desigining for P/M

A number in parentheses indicates the year of last reapproval. Is there a region critical to the performance of the part? Flanges A comparatively small flange, step, or overhang can asfm be produced aastm machining a shelf or step in the die. Standard chamfer tolerances are also listed in Table X1. Each section shall meet the minimum strength requirements prescribed in Table 5. It is assumed that ground steel shafting having a recommended?

Special tolerances should not be speci? Bearing shall conform to this speci?

The part combinations are only limited to the design concept. Will the part be machined—which surfaces, what tolerances? Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. For housings rigid enough to withstand the press?

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Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. As a b4438 rule, walls should not be thinner than 0.

Oil Impregnated Sintered Bronze / SAE Products

Four samples shall be made available for? Sample parts from the same lot will be radially crushed as is whole part. Is surface finish an important design feature, where, how to measure? Current edition approved April 1, Originally approved in Bearings are a natural product for PM because of its controlled porosity and the resulting self-contained lubrication. This value shall not be less than the minimum radial crushing strength speci?

This standard has been approved for use by agencies of the Department of Defense. Four samples shall be made available for? Any defect or failure shall be cause for rejection of the lot. After sizing and inspection, they are impregnated with a lubricating oil unless otherwise speci?