ASTM D4172 - Wear Preventive Characteristics of Lubricating Fluid (Four-Ball Method)
We perform four ball wear scar lubricity testing by ASTM D4172 using a Falex instrument to measure the wear prevention properties of lubricants. This test makes a preliminary evaluation of the anti-wear properties of fluid lubricants in sliding contact by means of the Falex Four-Ball Wear Test Machine. The test is also referred to as a 4-ball or wear scar test.
This test can be used to determine the relative wear preventive properties of lubricating fluids in sliding contact under the prescribed test conditions. Three steel balls are clamped together and covered with the lubricant to be evaluated. A fourth steel ball, referred to as the top ball, is pressed with a force of 15 or 40 kgf onto three clamped balls for three-point contact. The temperature of the test lubricant is regulated at 75°C (167°F) and then the top ball is rotated at 1200 rpm for 60 min. Lubricants are compared by measuring the average size of the scar diameters worn on the three lower clamped balls.
This test can also be performed on grease using ASTM D2266.
We also perform a range of other lubricity tests, including Four Ball EP (ASTM D2596, ASTM D2783), HFRR (ASTM D6079), Falex Pin on Vee Block (ASTM D3233, ASTM D5620, ASTM D2625, ASTM D2670) and many others.
Contact us today to receive a quote for your lubricants testing.
Sample quantity required: 100 ml
For additional information on this test method or to purchase a copy of the method, please click HERE to open a new window and visit the ASTM website. Learn more about our laboratory's certifications and quality program here.