1. After the thread surface of the reduced diameter of the worn screw is treated, the wear-resistant alloy is thermally sprayed, and then ground to size. This method is generally processed and maintained by professional spraying plants, and the cost is relatively low.
2. The twisted screw should be considered according to the actual inner diameter of the body, and the outer diameter deviation of the new screw should be given according to the normal clearance with the body.
3. Weld wear-resistant alloy on the threaded part of the worn screw. According to the degree of screw wear, the welding thickness is 1~2mm, and then the screw is ground to size. The wear-resistant alloy is composed of materials such as C.Cr.Vi.Co.W and B to improve the wear resistance and corrosion resistance of the screw. The processing cost of a professional surfacing factory is very high, and it is generally rarely used except for the special requirements of screws.
4. Hard chrome plating on the surface can also be used to repair screws. Chrome is also a wear-resistant and corrosion-resistant metal, but the hard chrome layer is easier to fall off.
*The SAP line subwoofer rotor with energy saving as the core, pure original host system,
*The bearing of the main engine adopts the special paired tapered roller bearing of SKF company to ensure accurate and even sealing. The efficiency of high-precision speed-increasing gears designed and manufactured according to DIN standards is 5~15% higher than that of the same level main engine.
* Large exhaust volume, high efficiency, strong energy saving, low noise and long operating life.
