... and inch deep groove ball bearing, self-aligning bearing, angular contact bearing, plain bearing, and spherical bearing. Open type, seal ... upon requirement.Features:Compared with traditional metal bearing, full ceramic bearing is featured in following aspects:1. ... conditions of higher speed.Size627,688,608 6000series,6200& 6300seriesAxle8mm,7mmRingsChromer SteelBallsSteelCageNylon,steelLubricationSpeed ...