THK 2LTR25UUZZCMS1050L Rotary Ball Spline Assembly

The THK 2LTR25UUZZCMS1050L Rotary Ball Spline Assembly is a compact, high-rigidity unit that provides simultaneous linear motion and rotary torque transmission through integrated angular-contact support bearings. It uses a 25 mm precision-ground spline shaft and an overall shaft length of 1,050 mm, featuring two spline nuts with UU double-end seals and ZZ double-end seals on the support bearings to resist contamination. The assembly showcases CM rotational clearance, a six-row recirculating ball design, and 20° spline and 30° bearing contact angles, delivering zero angular backlash and smooth, high-precision travel. Built as an integrated rotary ball spline with a flanged rotary spline nut, it emphasizes a maintenance-friendly, long-service-life design suitable for robotic Z-axes, indexing systems, automated handling equipment, and precision industrial machinery. Part of THK's LTR Rotary Ball Spline Series (Model LTR25), it is commonly installed in SCARA robots, semiconductor manufacturing equipment, automated assembly systems, wire winding machines, and other applications requiring synchronized rotary and linear movement.