1、HIGH ACCURACY SMOOTH MOTION: Ball bearing rotate with minimal frictional resistance, so that to obtain high accuracy smooth motion 2、LONG SERVICE LIFE: Adopt advanced technology, bring smooth and flat bearing surface, waterproof and dustproof, not easy to rust, possess long service life 3、GOOD QUALITY STEEL MATERIAL: Steel material has high hardness, good wear resistance and contact fatigue strength, while the core also maintains good toughness and can bear high impact loads 4、GOOD MUTE EFFECT: Well made bearing working in coordination with the machine can greatly improves the operating efficiency, and bearing noise is smaller 5、WIDE APPLICATIONS: Widely used in gearboxes, instrumentation, motors, household appliances, internal combustion engines, transportation vehicles, agricultural machinery, construction machinery, engineering machinery, roller skates, yo yos, etc.