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Tips for matching tailless steel threaded sleeves When we choose tailless steel threaded inserts, we generally just select the thread type and thread depth, and tailless steel threaded insert manufacturers usually directly send out tailless steel threaded inserts with broken grooves. , Through hole blind hole can be used. But if we choose through hole or blind hole, if it is a through hole, choose a tail slotted wire screw sleeve with a broken groove, if it is a blind hole, you should choose a tail slotted wire screw sleeve without a broken groove.
The grooving method of the non-tailed wire threaded sleeve with a broken groove is generally manually opened, and the requirement is to open 1/2 of the thickness of the diamond-shaped tailless steel wire. In actual operation, there will be a certain probability of opening or shallow opening. The mounting handle may be broken before it is installed in place. If the opening is shallow, the punching may not be complete, and it may cause a tripping phenomenon. Therefore, the military standard and the navigation mark require a 98% pass rate, and the blind hole is not broken. Groove without tail wire screw sleeve can effectively avoid 2% scrap rate. It should be noted that at the same thread depth, the non-broken groove and non-tailed wire screw sleeve should be increased by 1 to 2 turns than the broken groove.
The above describes the tips for selecting the tailless wire nut. Now let's talk about the characteristics of the tailless wire nut:
1. The diameter of the tailless wire screw sleeve in the free state is slightly larger than the diameter of the screw hole into which it is installed. During assembly, the diameter is reduced by a special installation tool, and it is rotated into the special installation hole. The internal thread of the bottom hole produces a spring-like expansion effect, making it firmly fixed in the thread hole.
2. Increase the bearing capacity and fatigue strength of the threaded connection.
3. Wear-resistant, heat-resistant and corrosion-resistant. The spiral surface hardness of the tailless steel screw sleeve can reach HRC43 ~ 50, and the surface finish can reach 2 ~ 4μm, which reduces friction and wear. The material is made of high-quality 304 stainless steel, which has good corrosion resistance and heat resistance, which can effectively prevent Stagnation and rusting of screws and bolts, connection seizure and scratches.
4. Save material. Compared with the common standard internal thread, under the same strength conditions, after using the tailless steel threaded sleeve, in order to make the best use of the yield limit, you can choose smaller size and higher strength screws, so that you can save a lot Material, reduce weight and reduce volume.
Firstly, it is installed on machine parts of metal or non-metallic materials (such as aluminum, magnesium and other light alloy engineering materials), which can form high-strength, high-precision, wear-resistant, and interchangeable standard internal threads. It is used in cast steel , Steel, cast iron can improve the durability of the screw, prevent the screw from loosening and fatigue breakage caused by various vibrations.
We have learned the above few tips on the purchase of tailless wire nuts, and we will find that many of them are actually known to us. It is precisely because we are familiar with it that we should let tailless wire nuts be used. The process is easier. Some people may be unfamiliar with tailless wire nuts when they choose. This requires us to be familiar with the characteristics of tailless wire nuts before we can make better choices.
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