LME12 Standard European‑size Linear Ball Bearing 12×22×32mm Open‑type CNC Automation 3D Printer Guide Spare Part Product Overview LME12 is an open‑type metric European‑series cylindrical linear ball bearing, designed for smooth low‑friction linear movement along 12‑mm guide shafts. Circulating steel balls convert sliding friction to rolling friction to deliver accurate reciprocating motion. Its standard compact dimension is widely interchangeable for automation equipment, CNC