Bearings for transmission shafts being parts of machines; ball-bearings for use in machines, namely, use in reapers, road rollers, roller conveyors, loading and unloading machines, lubricating pumps, belts for conveyors ; anti-friction bearings for machines; bearing brackets for machines; machine parts, namely, bearings; ball rings for bearings for machines, namely, for reapers, road rollers, roller conveyors, loading and unloading machines, and lubricating pumps; self-oiling bearings