Linear Bearing Unit is for complete sliding unit system with high accuracy ... , linear guide, ballscrew, linear bushing,support rail unit and Linear Bearing Unit.Features:High accuracyMove smoothly without deflection. Llittle friction and ... , SBR25LUU,SBR30LUU, SBR40LUU"SBR...UU" means LM series open bearing type unit."LUU" means with long type open bearing. Linear Bearing Pillow Block SBR20UU SBR20LUU