1Single rolling body columns and it is suitable for deep groove raceway 2Made of bearing steel material, durable to use. 3Simple structure with stable performance, it is easy to use 4The ball bearing has low frictional resistance and high speed 5It can be used in gearboxes, instrumentation, motors, household appliances, internal combustion engines, transportation vehicles, agricultural machinery, construction machinery, construction machinery, roller skates, yo-yo, etc.