F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F16 ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
F16C SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
F16C33/00 Parts of bearings; Special methods for making bearings or parts thereof
F16C33/30 Parts of ball or roller bearings
F16C33/58 Raceways; Race rings
F16C33/62 Selection of substances