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
F16C33/66—Special parts or details in view of lubrication
F16C33/6603—Special parts or details in view of lubrication with grease as lubricant
F16C33/6607—Retaining the grease in or near the bearing
F16C33/6611—Retaining the grease in or near the bearing in a porous or resinous body, e.g. a cage impregnated with the grease