Ball transfer units; Ball transfer units for use in carrier device; Bearing housings for machines; Bearings for transmission shafts, being parts of machines; Bushings for use as parts of machines; Gears for machines; Gears, other than for land vehicles; Machine parts, namely, bearing housings; Machine parts, namely, bearing inserts; Machine parts, namely, bearings; Machine parts, namely, metal grounding bushings; Machine parts, namely, roll mill bearings; Machine wheelwork; Self-lubricating m...