THK SR20W Radial Type Linear Motion Guide Block

The THK SR20W Radial Type Linear Motion Guide Block is a wide-body, four-row recirculating ball guide block designed to ride THK SR20 rails for high-rigidity, high-load linear motion. It supports SR20 (20 mm rail width) with a wide-type footprint and four-row equal-load raceway, delivering smooth, low-friction movement and excellent wear resistance for precision automation equipment used in CNC machine tools, semiconductor equipment, packaging machinery, robotics, inspection systems, electronic assembly equipment, medical devices, laboratory automation, material handling, and other precision positioning machinery where moment-load capacity matters. Key specifications include overall dimensions of 28 mm (height) × 42 mm (width) × 66.2 mm (length), basic dynamic load rating of 19.2 kN, and basic static load rating of 28.6 kN; material is hardened bearing steel, with lubrication options of grease or oil and a standard B-M6F grease nipple, plus seal options None, UU, SS, preload grades Normal, C1, C0, and accuracy grades Normal, H, P, SP, UP; operating temperature ranges from -15°C to 80°C. Common replacements include THK SR20V, SR20TB, and SR20SB blocks. This block is widely adopted by maintenance teams and system integrators for OEM replacement, machine repair, retrofit projects, and new precision motion system installations in automation equipment where stable mounting and robust moment-load performance are required.