4. Summary of Test Method
4.1 New, cleaned, and lubricated bearings are run under a light thrust load for 60 more or less 3 s to distribute the lubricant in a pattern that might be found in service. The bearings are exposed to water, then stored for 48 more or less 0.5 h at 52 more or less 1°C (125 more or less 2°F) and 100 % relative humidity. After cleaning, the bearing cups are examined for evidence of corrosion.
5. Significance and Use
5.1 This test method differentiates the relative corrosionpreventive capabilities of lubricating greases under the conditions of the test.
6. Apparatus
6.1 Bearings - Timken bearing cone and roller assembly LM11949, and cup LM11910.
6.2 Motor, 1750 6 50-rpm speed, 1/15 hp (min).
6.3 Bearing Holder, consists of a 1 more or less 0.10 kg weight, upper and lower plastic collars for the bearing cone (Parts A and B), a metal screw, and a plastic collar for the cup (Part C). (See Fig. 1.)
6.4 Plastic Test Jar, as shown in Fig. 2.
6.5 Run-in Stand, as shown in Fig. 3.
6.6 Spindle/Thrust Loading Device, as shown in Fig. 4. (See Table 1 for metric equivalents.)
6.7 Mechanical Grease Packer, as shown in Fig. 5 and Fig. 6.
6.8 Pliers, as shown in Fig. 7.
6.9 Syringe, of at least 100-mL volume and with a needle of at least 16 gage and a minimum length of 100 mm (4 in.).
6.10 Timer, capable of measuring a 60 more or less 3-s interval.
6.11 Oven - A laboratory oven, essentially free of vibration, capable of maintaining 52 more or less 1°C.
