THK HSR25A1SS(GK) Linear Motion Guide Slide Block

The THK HSR25A1SS(GK) Linear Motion Guide Slide Block is a precision recirculating ball bearing carriage designed to pair with THK HSR25 series guide rails, delivering high rigidity and exceptionally smooth, low-friction linear motion. As part of THK's GK Global Standard interchangeable family, it uses an A-type flange block with SS seals—end seals, side seals, and inner seals—to protect against contaminants while maintaining accurate movement, featuring four-way equal load design and self-aligning capability. Its footprint includes overall height 36 mm, block width 70 mm, and block length 83.1 mm, with mounting dimensions 57 × 45 mm and an M8 mounting thread; it is compatible with THK HSR25 series rails (25 mm) with 23 mm rail width and 60 mm hole pitch. Basic dynamic load rating is 27.6 kN and basic static load rating is 36.4 kN, with hardened bearing steel construction and lubrication compatible with grease or oil; the unit is manufactured in Japan. Commonly used in CNC machining centers, robotic positioning systems, semiconductor equipment, automated inspection machines, medical devices, packaging machinery, and precision industrial automation, it supports maintenance, OEM builds, and system integrators through convenient GK interchangeability and long-service reliability.