THK Co., Ltd. SHW21CA2UU370L Linear Guide Block and Rail Assembly

THK SHW21CA2UU370L Linear Guide Block and Rail Assembly is a complete caged-ball linear motion guide consisting of two SHW21CA flange-type bearing blocks mounted on a 370 mm SHW21 wide guide rail. This two-block, wide-rail configuration delivers compact, high-rigidity guidance with excellent moment-load resistance, smooth travel, and precise positioning for space-constrained applications. The SHW21CA2UU370L supports four-way equal loading and uses a caged-ball design for long life and low noise. Key dimensions include rail width 68 mm, rail size 21 mm, rail length 370 mm, block height 21 mm, and block length 59 mm. Rated performance features include a basic dynamic load rating of 8.24 kN and a basic static load rating of 12.8 kN. Lubrication options are grease or oil, and seals are UU double-end seals. Preload options are Normal (no symbol) or Light (C1), and available accuracy grades range from Normal to Ultra Precision. Operating temperature is -15°C to 80°C, and the assembly is made from hardened bearing steel. Notable features include wide-rail construction, low-profile design, high moment rigidity, self-adjusting capability, low noise, and long maintenance intervals, with compatibility with THK QZ lubrication systems. Common applications span semiconductor manufacturing equipment, automated assembly systems, packaging machinery, medical devices, precision inspection equipment, vision systems, CNC auxiliary axes, pick-and-place machines, and precision material handling—areas where system integrators and maintenance teams rely on reliable, accurate linear guidance.