THK Co., Ltd. SR20W Linear Motion Guide Block

The THK SR20W Linear Motion Guide Block is a wide-body radial-type carriage for THK SR20 rails that delivers high rigidity and smooth, low-friction movement for precision industrial automation. It uses a four-row recirculating ball raceway for high load and moment capacity, compatible with SR20 (20 mm rail width) rails, and measures 28 mm high, 42 mm wide, and 66.2 mm long with a dynamic load rating of 19.2 kN and a static load rating of 28.6 kN. Lubrication can be grease or oil, with a standard grease nipple B-M6F, and the operating temperature range is -15°C to 80°C; the unit is made from hardened bearing steel and features a wide-body radial design with a four-row equal-load raceway for high rigidity and wear resistance. Standard seal options include None, UU, and SS, with preload grades Normal, C1 (Light), and C0 (Medium) and accuracy grades Normal, H, P, SP, and UP; rail mounting is bolt-fixed. This guide block is commonly used in CNC machine tools, semiconductor equipment, robotics, packaging machinery, inspection systems, and automated production lines where high load capacity and precise positioning are required, and maintenance teams and system integrators use it for OEM replacement, machine repair, retrofit projects, and new precision motion system installations. Common replacements include THK SR20V, SR20TB, and SR20SB.