THK RSR12WVMUU310LM Linear Guide Block and Rail

THK RSR12WVMUU310LM is a miniature wide-type linear guide block and rail assembly that combines an RSR12WVM bearing block with a 310 mm precision guide rail. The wide block design delivers increased rigidity, smooth low-friction travel, and four-way equal load capacity, making it suitable for compact automation and high-precision positioning tasks. Specifications include a 310 mm rail length and 12 mm rail size, with an overall block height of 14 mm, block width 40 mm, and block length 44.5 mm; mounting thread M3 × 3.5 mm and mounting hole spacing 28 × 15 mm. The dynamic load rating is 5.48 kN and the static load rating is 5.30 kN. The UU seal designation denotes double end seals for improved contamination protection, while the M suffix indicates stainless steel construction for enhanced corrosion resistance. Rolling elements are precision recirculating steel balls, and the unit is grease lubrication compatible. THK positions this guide as a common choice for semiconductor equipment, laboratory automation systems, medical devices, optical inspection systems, electronics assembly machines, compact CNC systems, pick-and-place equipment, miniature robotic systems, and other applications requiring compact, accurate, and reliable linear motion with high rigidity. It is commonly used by maintenance teams, OEM machine builders, and system integrators for repairs, retrofits, and replacement of miniature linear guide systems.