THK RSR9KM Recirculating Ball Linear Bearing Block

The THK RSR9KM Recirculating Ball Linear Bearing Block on a 155 mm guide rail is a miniature precision linear motion guide assembly designed for compact equipment. The system pairs an RSR9KM bearing block with a 155 mm long, 9 mm wide, 6 mm high rail to deliver smooth travel, low friction, and high rigidity. Overall dimensions: bearing block 10 mm high, 20 mm wide, 30.8 mm long, four M3 tapped mounting holes, and an M3 × 3 mm mounting thread. Constructed from hardened precision ground bearing steel with precision recirculating steel balls, it is grease lubrication compatible and supports high-speed, high-accuracy motion with long service life when properly lubricated. Dynamic load rating is 2.22 kN and static load rating 3.06 kN. Common applications include laboratory instruments, semiconductor equipment, medical devices, optical inspection systems, automation equipment, compact CNC equipment, and precision measuring machines. This miniature guide is used by maintenance teams, OEM machine builders, and system integrators for repairs, retrofits, and replacement of miniature linear guide systems.