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Ball screw is the most commonly used transmission element in tool machinery and precision machinery. Its main function is to convert rotational motion into linear motion, or convert torque into axial repeated force. It also has the characteristics of high precision, reversibility and high efficiency.
Characteristics of ball screw transmission: The ball screw transmission mechanism uses the ball between the screw and the nut as an intermediate element, changing the sliding friction transmission between the screw and the nut into rolling friction transmission. The ball screw and nut are both equipped with arc-shaped spiral grooves. The two arc-shaped spiral grooves are combined to form a raceway. There are many balls installed in the raceway, so there is rolling friction between the screw and the nut. Ball retainers are installed at both ends of the spiral groove of the nut to block it, and there is a return pipe to allow the balls to roll out of the nut body from one end of the spiral groove, and then return to the other end of the raceway along this return pipe. In this way, when the ball screw rotates relative to the nut to perform linear motion feed transmission, the balls continuously roll in the spiral raceway.
As a precise and labor-saving transmission mechanism, it is widely used in ball screws of precision machine tools and CNC machine tools.
- Recirculating ball spindle drive | Spindle Drives | Main Spindle Drives
- Recirculating ball spindle drive | Spindle Drives | Rotary spindle
The trapezoidal screw spindles are designed and supplied as a complete installation kit with one or more fitted nuts as standard and according to customer requirements. Material, use, ensuring of lubrication and adjustment of the clearance created during operation are subject to the respective design habits of the customers and are not solved by the manufacturer. The manufacturer is only available for advice.
For the production of precision ball screws, steels of the quality ČSN 14 260, CF53 or 42CrMo4 (shafts) and 14 109 or 14 209 (nuts) are used. The nuts and the threaded part of the spindle are case-hardened and reach a hardness of 58-60 HRC. The core and non-hardened parts of the shaft have a minimum strength of Rm = 650 MPa.
The trapezoidal thread spindles and nuts are manufactured in three accuracy classes:
- Recirculating ball spindle drive | Spindle Drives | Main Spindle Drives
- Recirculating ball spindle drive | Drive Elements | Drive Components
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