What Is The Function of The DLC Coating on The Lead Screw?

The DLC coating of the trapezoidal screw has the following important functions:

1. Reduce friction coefficient

The friction coefficient of DLC coating is usually lower than 0.1. It can significantly reduce the friction resistance between the screw and the nut, lower energy loss, and improve transmission efficiency. Especially in high-precision and low-speed transmission scenarios, its advantages are particularly obvious.

2. Enhance wear resistance

The hardness of the DLC coating can reach 2000-3000HV, which is much higher than that of ordinary metal materials. It can effectively resist the wear of the screw rod during long-term reciprocating motion, extend the service life of the screw rod and nut, and reduce the decline in accuracy and the risk of failure caused by wear.

3. Enhance corrosion resistance

The DLC coating exhibits excellent chemical inertness and can effectively resist the erosion of common corrosive media (such as water, oil, chemical reagents, etc.), protecting the surface of the screw rod from rust and corrosion. It is suitable for use in humid, dusty or corrosive environments.

4. Improve lubrication performance

The DLC-coated surface is smooth and has self-lubricating properties, reducing the reliance on traditional lubricants. It can maintain excellent operational performance even in oil-free or low-oil environments, lowering lubrication maintenance costs and avoiding lubricant contamination.

5. Enhance anti-adhesion property

It can prevent the screw and the nut from undergoing adhesion or locking during the movement process. Especially when in contact with materials such as metals, plastics, and rubber, it can effectively avoid material transfer and adhesion, ensuring the smoothness of the transmission.

6. Maintain accuracy stability

Due to its low wear and deformation, the DLC coating helps maintain the geometric accuracy and transmission accuracy of the screw rod, ensuring the positioning accuracy and repetitive positioning accuracy of the equipment, and meeting the requirements of high-precision mechanical systems.

In conclusion, the DLC coating significantly enhances the reliability and service life of the trapezoidal screw by comprehensively improving its friction, wear, corrosion, etc. It is suitable for applications in aerospace, precision machinery, semiconductor equipment, medical devices, and other fields that have extremely high requirements for transmission accuracy and stability.

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