How To Choose Lead Screw？

Here are some of the key factors in choosing lead screw:

1.Load-bearing capacity

The primary function of a lead screw is to bear axial loads and achieve linear motion or force transmission through its engagement with the nut. Therefore, when selecting a lead screw, it is crucial to ensure that its load-bearing capacity meets the actual requirements. A larger diameter increases load-bearing capacity but also raises costs and space requirements. Generally, to enhance transmission efficiency and reduce costs, a smaller diameter should be chosen if the load-bearing requirements are met.

2.Wear resistance

The relative motion between the lead screw and nut generates friction, so the material must have good wear resistance to reduce wear and extend service life. The pitch of the screw determines its transmission speed and accuracy. A larger pitch results in faster transmission but may reduce accuracy; a smaller pitch results in slower transmission but higher accuracy. The choice should be based on specific application scenarios and requirements, such as selecting a smaller pitch for high-precision positioning applications.

3.Corrosion resistance

The lead screw may work in humid, corrosive and other harsh environments, so the material must have good corrosion resistance to prevent corrosion from affecting the performance and service life of the screw.

4.Material selection

Choose suitable materials based on usage requirements, cost-effectiveness, processability, and environmental friendliness. For example, carbon steel is ideal for applications with low performance demands, while lead screws that require high precision and frequent use are typically made of alloy steel. After quenching or nitriding treatment, these screws can withstand high temperatures and heavy loads.

5.Shaft end machining

The shape of the screw shaft end is designed according to the support structure and transmission structure at both ends of the screw.

To sum up, when choosing lead screw rod, we need to comprehensively consider the above factors and choose it according to the specific use scenario and working conditions.

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