THK HSR55H Recirculating Ball Linear Guide Block

The THK HSR55H Recirculating Ball Linear Guide Block is a long-flange, four-row block designed for use with THK HSR55 rails to deliver heavy-duty, high-precision linear motion. The HA long-flange variant features mounting holes spaced 116 × 95 mm, M14 threads, and a compact form with a 70 mm overall height, 140 mm block width, and 201.1 mm length, compatible with 55 mm rails (53 mm wide, 44 mm high). Dynamic load rating is 148 kN and static load rating 194 kN, with the block weighing about 5.7 kg; its hardened bearing steel raceways are precision-ground for low friction and long service life, with grease or oil lubrication and a B-PT1/8 grease nipple. Applications include CNC milling machines, machining centers, gantry automation, robotic transfer, semiconductor equipment, packaging machinery, and precision measuring systems; maintenance teams, OEM builders, and system integrators rely on it for repair, retrofit, expansion, and replacement. Interchangeable components are available in THK's Global Standard Series, with common replacements THK HSR55HA1SS, HSR55HAM, and HSR55CA1SS.