LM 30 LUU | XIC | Linear Motion Bearing | LM Series

The LME 12 UU is a metric linear‑ball bearing (also called a linear bushing) designed to slide smoothly along a 12 mm shaft, delivering precise, low‑friction linear motion. As indicated by “UU,” the bearing is sealed on both ends with rubber (or contact) seals — which helps keep out dust, dirt, and moisture, thereby extending service life and reducing maintenance. Internally it features four rows of steel balls (ball circuits = 4), retained in a polymer (plastic) cage, that roll along the shaft for smooth, accurate motion. The outer sleeve has an outer diameter of 22 mm and a total length of 32 mm. According to manufacturer data, LME 12 UU has a basic dynamic load rating of about 510 N and a static load rating of about 784 N, and its mass is around 0.041 kg when new. Because of its compact size, sealed design, and linear‑motion capability, LME 12 UU is commonly used in small to medium‑sized machines, such as CNC machines, 3D printers, linear actuators or automated equipment requiring stable and reliable shaft-guided motion.

The LME 8 UU is a compact linear ball bearing (a “linear bushing”) designed to slide along an 8 mm shaft, making it ideal for precise, low‑friction linear motion in small or lightweight systems. Its internal diameter (shaft size) is 8 mm, outer diameter 16 mm, and overall length is 25 mm. The bearing is of the closed type and sealed on both ends (“UU” designation), which helps prevent dust, dirt, and moisture from entering — thus enhancing durability and reducing maintenance. Inside, it uses four rows of steel balls held in a plastic (resin) retainer, allowing smooth, stable sliding along the shaft. Because of its small size and sealed design, LME 8 UU is well‑suited for compact machines such as desktop CNC machines, 3D printers, linear actuators, and other small automation or precision‑motion devices that require reliable linear guidance. Its combination of small footprint, low friction, and contamination protection makes it a popular choice for lightweight, precision linear motion applications.