ASTM D2981 Test Method for Wear Life of Solid Film Lubricants in Oscillating Motion
6. Apparatus
6.1 Block-on-Ring Test Machine, equipped with oscillating drive, load cell transducer and recorder described in detail in Annex A1 and illustrated in Fig. 1.
6.2 Test Ring, SAE 4620 Steel, having a Rockwell hardness of HRC 58-63. Each ring had a ground face of 8.163 mm +/- 0.127 mm (0.321 +/- 0.005 in.), a diameter of 34.9885 +/- 0.0254, -0.1270 mm (1.3775 +/- 0.001, -0.005 in.) and an eccentricity between the inner and outer surface of +/-0.038 mm (0.0015 in.). The surface finish of the outside diameter of each ring prior to lubricant coating application should be from 500 to 750 nm (20 to 30 µin.) rms.
6.3 Test Block, SAE 01 Steel with test surface of 0.635 +/- 0.021, -0.000 mm (0.250 +/- 0.0005, -0.0000 in.) wide and 1.575 +/- 0.005 mm (0.620 +/- 0.0002 in.) long and having a Rockwell hardness of HRC 58-63. Each block should have the test surface ground to a finish of 100 to 200 nm (4 to 8 µin.) rms and be perfectly square with all outside edges.
7. Reagents
7.1 Solvents, safe, nonfilming, nonchlorinated.
