THK Co., Ltd. LBF20UUCM391.5LH Linear Bush Bearing

The THK LBF20UUCM391.5LH is a round-flange linear bushing designed to provide smooth, accurate, low-friction linear motion when used with a 20 mm hardened LM shaft. It features a circular bolt-on flange and incorporates recirculating ball elements to deliver high positioning accuracy, low running resistance, and reliable performance in compact linear motion systems. The LBF series part offers bolt-on flange mounting, a 20 mm shaft diameter, a UU double-end seal, CM (medium) preload, and an accuracy grade H, with grease lubrication and an operating temperature range from -15 °C to 80 °C. Its hardened and ground bearing surfaces, combined with a compact design, support precise shaft guidance in space-constrained assemblies. Motion type is linear rolling motion. Typical applications include linear slide assemblies in automation equipment, automated production equipment, packaging machinery, semiconductor manufacturing systems, laboratory automation, medical equipment, textile machinery, and printing equipment, where smooth travel and accurate shaft guidance are essential. This bearing is used by maintenance teams, OEM machine builders, and system integrators for machine repairs, retrofits, and replacement of worn linear bushings.