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ASTM D4172 - Wear Preventive Characteristics of Lubricating Fluid (Four-Ball Method)

Significance and Use

5.1 This test method can be used to determine the relative wear preventive properties of lubricating fluids in sliding contact under the prescribed test conditions. No attempt has been made to correlate this test with balls in rolling contact. The user of this test method should determine to his own satisfaction whether results of this test procedure correlate with field performance or other bench test machines.

1. Scope

1.1 This test method covers a procedure for making a preliminary evaluation of the anti-wear properties of fluid lubricants in sliding contact by means of the Four-Ball Wear Test Machine. Evaluation of lubricating grease using the same machine is detailed in Test Method D2266.

1.2 The values stated in SI units are to be regarded as standard. Because the equipment used in this test method is only available in kgf units, SI units in parentheses are for information only.

Extracted, with permission, from ASTM ASTM D4172-20 - Wear Preventive Characteristics of Lubricating Fluid (Four-Ball Method), copyright ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428. A copy of the complete standard may be purchased from ASTM International, astm.org