1, the screw should be twisted according to the actual diameter of the barrel to consider, according to the normal clearance with the barrel of the new screw to make the outer diameter deviation.
2, wear screw diameter reduction of the thread surface after treatment, thermal spraying wear-resistant alloy, and then grinding to size. This method generally has a professional spraying factory processing repair, the cost is relatively low.
3. Wear-resisting alloy in the threaded part of wear screw. According to the degree of screw wear, surfacing 1~2mm thickness, then grinding screw to size. The wear-resisting alloy is composed of C, CR, VI, CO, W and b materials, which increase the abrasion resistance and corrosion resistance of the screw. Professional surfacing plant for this processing costs very high, in addition to the special requirements of the Screw, QQ: 2,923,134,021 very rarely used.
4, repair screw can also be used on the surface of hard chromium plating, chromium is also wear-resistant and corrosion-resistant metal, but hard chrome layer is easier to fall off.