THK HSR20A Recirculating Ball Linear Guide Block

The THK HSR20A Linear Bearing Block is a precision recirculating ball linear guide carriage designed for use with THK HSR20 Series rails, delivering smooth, low-friction motion and high rigidity in a compact flange-style block. Powered by THK's Four-Way Equal Load design, it maintains equal load capacity in radial, reverse-radial, and lateral directions, making it well suited for high-accuracy positioning in CNC machines, robotic positioning systems, semiconductor equipment, and automated packaging lines. Key specs include a flange-type block (Model HSR20A, Block Type A) with overall dimensions of 30 mm (H) × 63 mm (W) × 74 mm (L), an approximate footprint of 63 mm × 70 mm × 30 mm high, mounting footprint 53 mm × 40 mm, rail mounting hole pitch of 60 mm, mounting thread M6, basic dynamic load rating 19.8 kN, basic static load rating 27.4 kN, and a block weight of roughly 0.35 kg; made from hardened bearing steel and compatible with grease or oil lubrication. Commonly installed in CNC machining centers, industrial robots, semiconductor manufacturing equipment, automated inspection machines, medical devices, and precision automation, this block serves maintenance teams, OEM machine builders, and system integrators undertaking repair, retrofit, expansion, or replacement.