Linear motion bearings have a cylinder outer ring, multi-row steel balls and retainer. They are used on shafts for reciprocating liner motions. Because of the multi-row steel balls and low friction, they can be moved easily and lightly. They have long working life and easy maintenance and replacement 

Series	Bore diameter(mm)
LB	≤120
LB……AJ	≤120
LB……OP	≤120