Do you know what screw bearing is?

Screw bearing is a kind of bearing composed of screw, nut, reversing device and ball for converting rotary motion into linear motion or linear motion into rotary motion.

Features of screw bearing
The ball screw pair has the characteristics of high precision, reversibility and high efficiency. This is a further extension and development of the trapezoidal screw. The important significance of this development is to turn the sliding action of the trapezoidal screw into a rolling action. Because of its small frictional resistance, screw bearings are widely used in various industrial equipment and precision instruments.

Use of screw bearing
In order to adapt to various purposes, the ball screw pair provides a wide range of standardized products. The ball circulation methods include circulating duct type, circulator type and end cap type. Preloading methods include positioning preloading (double nut method, position preloading method) and constant pressure preloading. The appropriate type can be selected according to the purpose. The screw has high-precision grinding precision ball screw (precision is divided into 7 grades from CO-C10) and cold-rolled screw bearing formed by high-precision cold rolling (precision is divided into 3 grades from C-C10 , Only a few can do it).

In addition, in order to cope with the urgent demand for delivery by users, there are finished products that have been processed on the end of the shaft, semi-finished products and cold-rolled screw bearing that can be freely processed on the end of the shaft. As the peripheral parts of this bearing, the screw support unit, nut support, lock nut, etc. necessary for use have also been standardized and can be used by users.

The ball screw pair is based on the accumulated product technology over the years. From material, thermal management, manufacturing, inspection to shipment, it is managed by a rigorous quality assurance system, so it has high reliability.
(1) Double push and one free way
The fixed end of the screw is free. The fixed end screw bearing bears both axial force and radial force. This type of support is used for short lead screws with small strokes.

(2) Double push and one support method
One end of the screw is fixed and the other end is supported. The fixed end screw bearing bears both axial force and radial force. The supporting end screw bearing only bears radial force, and can make a small amount of axial floating, which can avoid or reduce the bending of the lead screw due to its own weight, and the lead screw thermal deformation Can be freely extended to one end.

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