Thread protective sleeve
Thread protector (also called threaded insert) is a new type of internal threaded fastener refined from rhombic stainless steel wire, which has high strength, high precision and excellent quality, and can be divided into ordinary type and locking type. It can be screwed into the threaded hole of metal or nonmetal material to improve the connection strength, thus forming an internal thread with high strength, wear resistance, high temperature resistance and corrosion resistance, comprehensively improving the service performance of the threaded hole and prolonging the service life of machine parts.
Function introduction of thread protective sleeve
Thread protection sleeve is mainly used for the maintenance of screw holes and the manufacture of screw holes with high requirements. The repaired thread is superior to the original thread. The function of thread protection sleeve is to make the thread stronger, and it has the functions of durability, rust prevention, high temperature resistance, volume reduction, weight reduction and reliability improvement of threaded connection. It can improve the wear resistance, connection strength and fatigue strength of threads and reduce thread wear. It can be converted between English threads and metric threads, and can also be used interchangeably with other similar sheaths.
Introduction of working principle of thread protection sleeve
Thread protection sleeve is generally made of high-quality stainless steel wire with rhombic cross section, which is mechanically rolled into spring-like thread. The diameter of the sheath is larger than the diameter of the screw hole. When the sheath is installed, it is compressed and fastened, and it springs back to its original state after installation, so that the sheath is permanently fixed in the screw hole. Because of its larger diameter, the wire sheath has a larger contact surface and is stronger than the original wire.
Introduction to the use of thread protection sleeve
The use method of thread protection sleeve is to drill holes first, and then remove the damaged threads with a drill nozzle. Secondly, tapping, tapping in drilling with special threads. Thirdly, installation: use special installation tool to gently push down the sheath and screw it into the screw hole until the distance between the sheath line tail and the workpiece plane is not more than 1/4 ~ 1/2 turns. Fourth, the horizontal line is cut off. When the workpiece is a through hole, pull out the installation tool, then put it on the horizontal line horizontally, and then beat it hard to break the horizontal line. Horizontal lines shall not be cut in blind holes.
Price introduction of thread protective sleeve
The thread protector is a small part, and the price is usually cheaper, especially the price of each one is a few cents. Hengyuan 3-300MM wire protector is elastic sheath, made of PVC, with six colors of red, yellow, blue, black, white and transparent. The price of HC online is 0.05 yuan each. Qixian M4 thread protection sleeve is a kind of steel sleeve with internal and external threaded bolts, which is a special fastener for aviation. The online price of HC is 9.5 yuan. Zhaolong HWA02 thread protector is a tapered external thread protector, and the price on HC Online is 60 yuan. (Price source network, for reference only)
Through the above introduction, I believe everyone has a certain understanding of the function, working principle, usage and price of the thread protector. It can be seen that thread protectors are widely used, mainly for protection. There are different specifications and materials in the market, and their applicable threads are also different. Here, Bian Xiao, Tuba Rabbit, reminds everyone to pay attention to the appropriateness and accuracy of the size when purchasing the protector. You'd better try a sample when buying.