LM..UU / LM..LUU Series – Standard Round Type Linear Ball Bearing

The LM series is our standard round type linear ball bearing, featuring a steel ball rolling element + outer ring + retainer structure. Designed for use with linear shafts, it enables low-friction linear motion. This series is designed for complete assembly interchangeability with mainstream LM series products. Available in standard type (LM..UU) and extended type (LM..LUU) specifications, suitable for linear motion applications including automation equipment, linear modules, and precision measuring instruments.

Key Features

• Assembly Replacement – Direct replacement of existing same-series bearing bodies in customer equipment
• Standard Type (UU) – Standard housing length, suitable for conventional load applications
• Extended Type (LUU) – Extended housing length, significantly improved rigidity and stability
• Double End Seals – UU indicates seals on both ends, effectively preventing dust ingress, resisting contamination, and extending service life
• Low Friction Design – Steel ball rolling elements create point contact with the linear shaft, resulting in low friction coefficient and smooth motion
• Wide Size Range – Fits shaft diameters from 6mm to 60mm, covering mainstream application requirements

Matching an LM, SCS, SBR or SHF unit? See which brands actually build this housing family in our linear bushing interchange chart.

Full Specifications