Oil content values are generally contained in specifications for oil-impregnated PM bearings.

The oil-impregnation efficiency provides an indication of how well the as-received parts had been impregnated.

The desired self-lubricating performance of PM bearings requires a minimum amount of interconnected porosity and satisfactory oil impregnation of the interconnected porosity. A minimum oil content is specified.

The results from these test methods may be used for quality control or compliance purposes.

1. Scope

1.1 This standard describes three related test methods that cover the measurement of physical properties of oil-impregnated powder metallurgy products.

1.1.1 Determination of the volume percent of oil contained in the material.

1.1.2 Determination of the efficiency of the oil-impregnation process.

1.1.3 Determination of the percent interconnected porosity by oil impregnation.

1.2 The values stated in SI units are to be regarded as the standard. The values in parentheses are converted in accordance with IEEE/ASTM SI 10 and are for information only.

1.3 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

D1217 Test Method for Density and Relative Density (Specific Gravity) of Liquids by Bingham Pycnometer

D1298 Test Method for Density, Relative Density (Specific Gravity), or API Gravity of Crude Petroleum and Liquid Petroleum Products by Hydrometer Method

IEEE/ASTM Standard

SI10 American National Standard for Use of the International System of Units (SI): The Modern Metric System

Keywords

impregnation efficiency; interconnected porosity; oil content; oil-impregnated bearings; oil-impregnation efficiency; oil-impregnated PM parts; Archimedes method; Interconnected porosity; Oil content; Oil impregnation; Powder metallurgy (P/M) materials;

ICS Code

ICS Number Code 77.160 (Powder metallurgy)

Citing ASTM Standards

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