FD209RJ Deep Groove Ball Bearings

Sliding bearings are sliding friction, with giant contact surface, easy structure, small volume, sturdy bearing capacity, exact vibration resistance, however massive friction coefficient, handy to generate heat, want enough lubrication, appropriate for low pace and heavy load
Rolling bearings are rolling friction, in contrast with sliding bearings, their contact floor is small (point contact for ball bearings, line contact for curler bearings), small friction coefficient, much less warmth generation; much less put on and tear, top accuracy retention; appropriate for greater speeds run down. However, the bearing capability is barely poorer and the vibration resistance is poorer.