THK Co., Ltd. HSR55A1SS Linear Motion Guide Block

The THK HSR55A1SS Linear Guide Block is a heavy‑duty flange‑type recirculating ball bearing block designed for THK HSR55 rails, delivering smooth, low‑friction movement, high rigidity, and four‑way equal‑load capability for precise positioning in demanding high‑load linear motion systems. It features a flange carriage with threaded mounting holes and a four‑row recirculating ball guide, compatible with 55 mm rail size and 53 mm rail width, with overall dimensions of 70 mm (M) by 140 mm (W) by 163 mm (L), mounting hole spacing 116 × 95 mm, and mounting thread M14. Key specs include a dynamic load rating of 121 kN and a static load rating of 146 kN, a grease nipple B-PT1/8, block weight approximately 4.5 kg, hardened bearing steel construction, and SS end, side, and inner seals, with lubrication available by grease or oil. The block is designed for long service life and precise motion, featuring precision‑ground raceways and self‑aligning capability for stable performance under load. Common applications span CNC machining centers, milling machines, gantry systems, robotic automation, semiconductor manufacturing equipment, packaging machinery, heavy‑duty factory automation, precision measuring equipment, and material handling systems. It is commonly used by maintenance teams, OEM machine builders, and system integrators for equipment repair, retrofit, expansion, and replacement, ensuring reliable, high‑precision linear motion in industrial environments.