LM 25 UU | XIC | Linear Motion Bearing | LM Series

The LME 20 UU is a linear‑ball bearing (linear bushing) designed to slide smoothly along a 20 mm shaft, providing precise, low‑friction linear motion. Its bore (inner diameter) is 20 mm, and the outer diameter is 32 mm, with a total length (along the shaft) of 45 mm. Internally it contains five rows of steel balls held in a polymer (plastic) retainer, which roll along the shaft on precision‑ground raceways. The “UU” designation means the bearing is sealed on both ends with rubber/contact seals — this helps keep out dust, dirt, and moisture, thereby extending operational life and reducing maintenance. The outer housing is hardened steel for strength and durability, making it suitable for repeated use under load. In terms of load capacity, LME 20 UU has a basic dynamic load rating around 862 N and a basic static load rating around 1370 N. Because of its moderate size, smooth motion, and sealed design, LME 20 UU is commonly used in equipment like CNC machines, 3D printers, automation systems, linear actuators, and other machinery requiring stable, shaft‑guided linear motion.