THK HRW21CA1UU(GK) Linear Rail Guide Carriage Block Bearing Module

The THK HRW21CA1UU(GK) Linear Rail Guide Carriage Block provides four-way equal-load, high-rigidity linear guidance on THK HRW21 rails, delivering 8.02 kN dynamic load and 12.9 kN static load in a compact 21 mm-high CA flanged carriage. Ideal for CNC machine tools, robotic positioning systems, semiconductor equipment, pick-and-place machines, automated assembly lines, packaging machinery, and precision laboratory automation, this block supports smooth motion with low friction and high positioning accuracy. Key specifications include compatibility with HRW21 (21 mm) rails, wide-rail recirculating ball design, carriage dimensions of 21 × 68 × 58.8 mm, weight approximately 0.25 kg, UU double-end seals, GK factory grease, operating temperature of -20°C to 80°C, and construction from hardened bearing steel, with top or bottom mounting via the flanged block. Common replacements include THK HRW21CAMUU(GK), HRW21CRUU(GK), and HRW21CRMUU(GK). Used by maintenance teams, OEM machine builders, and system integrators for machine repairs, retrofits, and precision motion upgrades.