THK Co., Ltd. SR20 Linear Guide Bearing Block Carriage

The THK SR20 Linear Guide Bearing Block is a radial-type bearing block designed for SR20 rails to deliver smooth, accurate, low-friction linear motion in compact automation systems. It uses a full-ball bearing design with block dimensions of 59 × 28 mm (overall width 59 mm, height 28 mm, overall length 47.3 mm) and a rail width of 20 mm, with mounting thread M5 × 8 and a grease nipple B-M6F for grease or oil lubrication, and it operates from -15°C to 80°C. Preload options include Normal, C1 (Light), and C0 (Medium) with accuracy grades Normal, H, P, SP, UP, all in hardened bearing steel for long service life. Common applications span CNC machinery, semiconductor equipment, packaging machines, robotics, electronic assembly equipment, and precision positioning systems, and maintenance teams and system integrators use the SR20 block for OEM replacement, machine repair, retrofit projects, and building high-precision linear motion assemblies; compatible replacements include THK SR20V, SR20W, and SR20SB.