THK 2LTR25UUZZCMS1050L Rotary Ball Spline Assembly

Description:

The THK 2LTR25UUZZCMS1050L Rotary Ball Spline is a precision linear motion assembly featuring a 25 mm spline shaft with a 1,050 mm overall shaft length, integrating a rotary ball spline nut with support bearings for simultaneous linear motion and torque transmission. Commonly installed in SCARA robots, semiconductor manufacturing equipment, automated assembly systems, wire winding machines, and precision positioning equipment requiring synchronized rotary and linear movement. Machine builders, maintenance technicians, and automation integrators use this assembly for new machine construction, automation retrofits, repairs, and replacement of high-precision rotary ball spline systems.

Applications:

The THK 2LTR25UUZZCMS1050L belongs to THK's LTR Rotary Ball Spline Series, which integrates angular-contact support bearings directly into the spline nut to create a compact, high-rigidity unit capable of supporting both rotational and linear motion. The model features a 25 mm precision-ground spline shaft, UU double seals on the spline nut, ZZ support bearing seals, CM rotational clearance, and a 1,050 mm shaft length. Its preload design eliminates angular backlash while providing excellent rigidity, smooth travel, and high positioning accuracy, making it ideal for robotic Z-axes, indexing systems, automated handling equipment, and precision industrial machinery.

Technical Specifications:

• Brand: THK
• Part Number: 2LTR25UUZZCMS1050L
• Product Type: Rotary Ball Spline Assembly
• Series: LTR Rotary Ball Spline Series
• Model: LTR25
• Spline Shaft Diameter: 25 mm
• Overall Shaft Length: 1,050 mm
• Shaft Type: Precision Ground Solid Spline Shaft
• Number of Spline Nuts: 2
• Nut Seal: UU (Double End Seals)
• Support Bearing Seal: ZZ (Double End Seals)
• Rotational Clearance: CM
• Bearing Type: Integrated Angular Contact Support Bearings
• Ball Arrangement: Six-Row Recirculating Ball Design
• Contact Angle (Spline): 20°
• Contact Angle (Support Bearing): 30°
• Motion Capability: Simultaneous Linear Motion and Rotary Torque Transmission
• Construction: Integrated Support Bearing Rotary Ball Spline
• Mounting: Flanged Rotary Spline Nut
• Features: Zero angular backlash, high rigidity, compact integrated construction, smooth low-friction operation, precision-ground shaft, maintenance-friendly design, high-speed capability, excellent positioning accuracy, contamination-resistant seals, and long service life.

Common Replacements:

• THK 2LTR20UUZZCMS1050L
• THK 2LTR25UUZZCMS800L
• THK 2LTR32UUZZCMS1050L