| abstract |
The greases contain (A) mineral oil of 12-19 cSt viscosity at 50 degrees C and pour pt. is not >45 degrees C, (B) a mixt. of Li soaps of (1) stearic acid, (2) oleic acid and (3) polymerised castor oil, (2) and/or (3) being sulphurised and (C) an antioxidant. The S content is is not 0.4 wt.% of the grease. (A) pref. has an aniline pt. of 75-80 degrees and the grease pref. contains 11-14 wt.% (1), 1-3% (2) and 4-8 % (3) as Li soaps, 1-3 % (C), and to 100 % (A). The greases are esp. suitable for use in roller bearings e.g. in railway axle boxes, and ensure satisfactory operation for long periods over a wide range of air temps. They protect the bearings from corrosion and spread evenly over the surfaces to be lubricated. |