ASTM D2782 Test Method for Measurement of Extreme-Pressure Properties of Lubricating Fluids (Timken Method)
6. Apparatus
6.1 Timken Extreme Pressure Tester, described in detail in Annex A1 and illustrated in Fig. 2.
6.2 Sample Feed Device, for supplying the test specimens with fluid is described in Annex A1.
6.3 Loading Mechanism, for applying and removing the load weights without shock at the uniform rate of 0.91 to 1.36 kg/s (2 to 3 lb/s). A detailed description is given in Annex A1.
6.4 Microscope, low-power (50x to 60x) having sufficient clearance under objective to accommodate the test block. It should be fitted with a filar micrometer so that the scar width may be measured with an accuracy of +/- 0.05 mm (+/-0.002 in.).
6.5 Timer, graduated in minutes and seconds.
7. Reagents and Materials
7.1 Acetone, conforming to Specification D329.
NOTE 2 - Warning: Extremely flammable. Harmful when inhaled. See A3.1.
7.2 Stoddard Solvent or White Spirit, conforming to Specification D235.
NOTE 3 - Warning: Flammable. See A3.2.
7.3 Test Cups, of carburized steel, having a Rockwell Hardness "C" Scale Number of 58 to 62, or a Vickers Hardness Number of 653 to 756. The cups have a width of 0.514 +/- 0.002 in., a perimeter of 6.083 +/- 0.009 in., a diameter of 1.938 + 0.001, -0.005 in. and a maximum radial run-out of 0.0005 in. The axial surface roughness should lie between 0.51 and 0.76 µm (20 and 30 µin.) C.L.A.
7.4 Test Blocks, with test surfaces 0.485 +/- 0.002 in. wide and 0.750 +/- 0.016 in. long, of carburized steel, having a Rockwell Hardness "C" Scale Number of 58 to 62, or a Vickers Hardness Number of 653 to 756. Each block is supplied with four ground faces and the surface roughness should lie between 0.51 and 0.76 µm (20 and 30 µin.) C.L.A.
