THK Co., Ltd. SHS55LR1KKFM Linear Block Bearing

The THK SHS55LR1KKFM Linear Block Bearing is a precision long-type block for SHS55 guide rails, delivering high-load, high-rigidity, and repeatable, accurate linear motion in demanding industrial applications. It is a Long Square Type (LR) block sized at 100 mm wide, 80 mm high, and 213 mm long, compatible with SHS55 rails and a 53 mm guide-rail width, and it uses a four-way equal-load, caged-ball design for smooth, self-adjusting motion with low friction and long service life. Key specs include dynamic load 161 kN, static load 259 kN, top-surface mounting with M12 × 18 mounting holes, lubrication options of grease or oil, and an operating temperature range of -15°C to 80°C. The unit is made from hardened bearing steel and is compatible with THK QZ lubrication systems. Alternate markings include SHS55, SH555, and YAA1076R. Common replacements are THK SHS55R and SHS55LR, and THK HSR55LA. Typical applications span CNC machining centers, gantry systems, factory automation equipment, robotics, electronics manufacturing equipment, packaging machinery, automated assembly lines, semiconductor manufacturing equipment, precision inspection equipment, and heavy-duty material handling machinery, with maintenance teams and system integrators using it for machine repair, OEM replacement, retrofit projects, and restoring precise linear motion performance.