Self-oiling bearings; Ball-bearings; Bearing brackets for machines; Bearings [parts of machines]; Bearings for transmission shafts; Roller bearings; Ball rings for bearings; Anti-friction bearings for machines; Shaft couplings [machines]; Axles for machines; Grease rings [parts of machines]; Universal joints [Cardan joints]; Belts for conveyors; Belts for machines; Rubber tracks being parts of crawlers on agricultural machines.