Knurled Shaft Lead Screw is an integrated precision transmission shaft combining lead screw thread, stepped journal and knurled end. Manufactured by CNC turning and thread processing from alloy steel. It can convert rotary motion into linear motion, or cooperate with worm gear for cross-axis deceleration and torque amplification. The knurled section provides high friction connection to avoid slipping during power transmission. Thread parameters, shaft diameter, total length and knurl style can be customized according to technical drawings.