THK Co., Ltd. SR20W1SS (GK) Linear Guide Block

The THK SR20W1SS(GK) Linear Guide Block is a wide-type Radial Type Linear Motion Guide carriage designed for THK SR20 LM rails, delivering high rigidity and smooth, low-friction linear movement. Built with a four-row recirculating-ball raceway, it offers excellent moment-load capacity and increased stability for precision automation systems. Commonly used in CNC machine tools, semiconductor manufacturing equipment, packaging machinery, robotics, optical inspection systems, and automated production equipment requiring reliable, repeatable linear guidance, this block is a preferred choice for OEM replacements, machine repair, retrofit projects, and new precision motion assemblies by maintenance teams and system integrators. Key specifications include compatible rail width 20 mm; overall height 28 mm; overall width 42 mm; overall length 66.2 mm; block width 32 mm; mounting thread size M5 × 8 mm; basic dynamic load rating 19.2 kN; basic static load rating 28.6 kN; seal configuration SS (End Seal + Side Seal + Inner Seal); material stainless steel; lubrication grease or oil; operating temperature −20°C to 80°C; weight approximately 0.3 kg. This wide-body design, combined with a four-row equal-load raceway, provides high positioning accuracy and long service life, making it well suited for applications in factory automation, electronic assembly equipment, medical devices, and precision positioning machinery where stable, repeatable motion is essential.