The general principles are as follows,

1. Low-precision, light-load ball screws are made of carbon structural steel. Some of them can be cold-rolled and used directly.

2. High-precision, large-load ball screws are mostly made of alloy tool steel and bearing steel, often induction hardening, flame hardening and integral hardening are also used.

3. Some manufacturers of small size ball screws are used to carburizing and quenching.

4. Some high-precision ball screws that are easily deformed during heat treatment can be made of nitriding steel and used after nitriding.

5. For ball screws that work in corrosive and high temperature environments, precipitation hardening stainless steel materials can be selected

Ball screw is the most commonly used transmission element in tool machinery and precision machinery. Its main function is to convert rotary motion into linear motion, or convert torque into axial repetitive force, and it has both high precision, reversibility and high Features of efficiency. Because of its small frictional resistance, ball screws are widely used in various industrial equipment and precision instruments.

The ball screw is composed of a screw, a nut, a steel ball, a pre-compression piece, a reverser, and a dustproof device. Its function is to convert rotary motion into linear motion, which is the further extension and development of Akem screw. The important significance of this development is to change the bearing from sliding motion to rolling motion.

The general principles for the selection of trapezoidal screw materials are as follows;

1. Low-precision, light-load lead screws are usually made of carbon structural steel, which is normalized, quenched and tempered, or directly machined from cold-rolled free-cutting steel.

2. High-precision, light-load lead screws are usually made of carbon gongshen steel or alloy tool steel, and are quenched and tempered or spheroidized and annealed.

3. It can be made of medium carbon structural steel with low precision and wear resistance requirements, and used directly after nitrocarburizing treatment.

4. The lead screw with high precision and frequent work is usually made of alloy tool steel, which is integrally quenched, and it is made of high-grade nitriding steel and subjected to nitriding treatment. Nitriding screw can withstand higher temperature work.

5. The small view grid screw with high precision and wear resistance can be made of low-alloy steel for carburizing and quenching.

6. For measurement, the lead screw with little force can be induction hardened.