THK Co., Ltd. LBF50 KX1K27 Ball Spline Flange Nut

The THK LBF50 KX1K27 Ball Spline Flange Nut is a high-torque, flange-mounted cylindrical nut designed for simultaneous linear motion and torque transmission on a 50 mm spline shaft, part of THK's LBF High Torque Ball Spline series, with recirculating-ball elements for rigid, low-friction travel. Key specs include a basic dynamic torque rating of 1,100 N·m, a basic static torque rating of 1,940 N·m, dynamic load 46.6 kN, static load 73.0 kN, UU double-end seals, an oil hole, and construction from iron-based bearing steel, operating from -15 to 80 °C. Flange mounting (bolt-on) and the single-shaft design make it a common choice for industrial robots, automation equipment, semiconductor manufacturing equipment, packaging machinery, automated assembly lines, and material-handling systems, often specified by system integrators. Preload options include Normal, CL (Light), and CM (Medium); accuracy options are Normal, H (High Accuracy), and P (Precision); standard lubrication is grease, with an oil hole, and THK lists common replacements such as LBF50UU, LBS50, and LBH50.