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General-purrpose wire thread insert
Auther: Pubdate:2018-09-18
Screw sheath is a new type of threaded fasteners, special repair and increase internal thread.It is made of high strength cold-rolled stainless steel wire precision diamond shape of spiral coil.Screw kit and can form a standard high-precision internal thread, its various performance were better than direct tap tapping formation of the internal thread, conform to the requirements of the thread through check gauge.
Screw sheath can be divided into regular and locking type two kinds, can be screwing in metal or nonmetal material threaded hole, to form a high strength, wear resistance, high temperature resistant and has excellent corrosion resistance of standard internal thread, improve the performance of screw hole extending the service life of the product.
 
The representation method of screw sheath: 
Such as: * 1 M6-1 d, namely the thread for the M6, pitch to 1 mm, length is 1 times the diameter of the screw sheath.M8-1.25 * 2 d, both threaded as M8, pitch is 1.25 mm, length is 2 times the diameter of the screw sheath.
 
Screw sheath is mainly used for maintenance and screw holes to demand higher screw holes.Especially in prevent costly machine due to the damage of screw holes can't normal use, plays a huge role.Internal thread often damaged due to various reasons, such as tripping, rotten teeth, wear, corrosion, rust, etc.Internal thread damage can sometimes cause serious loss, light person affect assembly process and assembly quality, the person that weigh can cause the big scrap, steel wire spiral sets to provide you with a set of simple and reliable method of internal thread repair, repair after the thread, the thread is more superior than the original.For strength lower parts such as aluminum, magnesium, copper, iron, steel, plastic, density board, wood, glass fiber reinforced plastic, this is especially obvious. 
Guangzhou sheng feng hardware to provide a full range of screw set, specifications from M2 to M36, steel wire spiral sets of complete inventory, quick delivery, has so far users for guangzhou and other areas to provide a variety of specifications of the screw sheath, at the same time also to guangzhou several us-funded enterprises to provide supporting services, a screw welcome to inquire.
Suzhou a screw
Wire thread sheath embedded in aluminum, magnesium, iron, glass, plastic and other low strength of screw thread hole of engineering materials, can form the standard of internal thread, has high bonding strength, the function of the earthquake, impact resistance and wear resistance, and can disperse stress protect matrix thread, greatly extend the service life of the matrix.In addition, the steel wire can also be a screw thread tripping on the original matrix and teeth, as a means of repair, scrap, without causing the whole matrix and maintenance is convenient, rapid economy.
Suzhou a screw
By a screw thread specification can be divided into the metric system (coarse and fine teeth), unified coarse thread screw (UNC) and fine thread screw (UNF), in addition to the British standard (coarse thread BSW and fine teeth BSF) and pipe thread screw sheath (G) specifications.Suzhou pan to provide wire screw according to its structure can be divided into: regular running (free) and locking (screw lock), type locking screw is in the middle of the screw by once or more times a polygon coil installed in one of the bolt clamping action, have the effect of locking.Additional locking washers etc. It is not necessary, so that we can reduce costs and ensure the simplified assembly.
Left for the lock screw, a thread in the middle of the plastic deformation.
Screw sheath

Usually the length of the screw sheath according to the installation of bolts in them nominal diameter d multiple choice, each with a screw 1 d, 1.5 d and 2 d, 2.5 d and 3 d length.For example, M6, long 1.5 d, a screw installed can form M6, length is 9 mm internal thread hole.
Suzhou screw sheath

Guangzhou sheng feng hardware can provide the product:
Metric thread sheath and special screw tap/erector wrench (spot specifications);The imperial american-made sheath and related tools tap screw lines;American fine thread steel wire and a screw tools;Suit and bagged screw sheath;Metric bulk wire and a screw tap installation tools and remove the tool.
The function and application of the screw sheath
Thread protection function: sheath, also called wire or braces, a screw is to use the characteristics of the spring tension screw sets into female within the thread, the thread occlusion torque/tension load balancing, so can make the thread increase in strength, achieve better lock effect.
Wire purposes: a screw in the machining process of workpiece, a bit of software materials such as aluminum, copper, iron, or even plastic, bakelite and threaded parts in machining, because of its material itself is not hard, so will cause slippery tooth when lock screw, the screw sheath (steel wire spiral sets) to solve the problem, it can be damaged thread hole reaming tapping again, screw sets into the inside, to form a new, stronger internal thread., of course, we do not need to wait until the thread is broken and then take remedial action, in fact, we can in the first place according to the requirements of the size of the screw sheath hole tapping and load steel wire spiral sets, can not only improve the product quality and effective to avoid the loss in the future.Screw sheath/steel screw applicable industry: many industries are the applicable objects, such as the automotive industry, metal products, aluminum products, copper products, etc., but meet the environment suitable for the following three conditions:
1, the workpiece machined with internal thread
2, the work itself is soft or insufficient strength
3, the female need to install the screw even need to remove the back and forth
The material of a screw
Generally use a screw material: steel screw nut/screw sheath generally use high quality SUS304 stainless steel as raw materials, with cold processed into the precision of the diamond section, again USES the bending, machining, according to the corresponding specification processed into spiral screw, then through aging treatment, metal machinery more stability and fatigue resistance, general hardness more than HRC40, so the use of a screw work than didn't use to work more durable, more even than the workpiece after heat treatment. 
Steel wire spiral sets of installation method
The installation of the screw sheath usage diagram:
steps The sample The tools used
1, drilling Threaded sheath installation method
2, tapping
3, the screw set into the direction
4, turned into a screw
5, break guide tongue
The effect of 6, after loading
7, take out the method
The metric system and American a screw nut specification table
Screw sheath specifications and borehole size table units: mm
The installation of a screw specifications

Imperial american-made specifications specifications and installation of the screw sheath parameters: 
American thread Tapping and borehole size (mm) Screw sheath length (laps plus or minus 1/4 turn)
The imperial coarse thread The minimum The biggest Applicable to drill 1D 1.5D 2D 2.5D 3D
# 4-40 2.95 3.07 3 2 3/4 4 3/4 6 3/4 8 7/8 10 7/8
# 5-40 3.25 3.38 3.3 3 a quarter 5 1/2 7 3/4 10 12 1/4
# 6-32 3.66 3.81 3.7 2 3/4 4 3/4 6 7/8 8 7/8 10 7/8
# 8-32 4.32 4.47 4.4 3 1/2 6 8 3/8 10 3/4 13 a quarter
# 10-24 5.05 5.21 5.1 2 7/8 5 7 1/8 9 1/4 11 3/4
A quarter - 20 6.63 6.78 6.7 3 3/8 5 3/4 8 10 3/8 12 3/4
5/16-18 8.33 8.48 8.4 4 6 5/8 9 1/4 11 7/8 14 5/8
3/8-16 9.91 10.11 10 4 3/8 7 1/4 10 12 7/8 15 3/4
7/16-14 11.51 11.76 11.6 4 1/2 7 3/8 10 1/4 13 1/8 16 1/8
13 1/2 - 13.08 13.34 13.2 4 7/8 7 7/8 11 14 1/8 17 1/8
9/16-12 14.68 14.94 14.8 5 1/8 8 1/4 11 1/2 14 3/4 17 7/8
5/8-11 16.59 16.84 16.7 5 1/4 8 1/2 11 3/4 15 18 3/8
3/4-10 19.84 20.09 20 5 7/8 9 3/8 13 16 1/2 20 1/8
7/8-9 23.01 23.27 23 6 1/4 10 13 3/4 17 1/2 21 a quarter
The imperial fine thread The minimum The biggest Applicable to drill 1D 1.5D 2D 2.5D 3D
# 8-36 4.32 4.44 4.4 3 7/8 6 1/2 9 1/8 11 5/8 14 a quarter
# 10-32 4.98 5.13 5 4 1/8 6 7/8 9 1/2 12 1/4 14 7/8
A quarter - 28 6.53 6.71 6.6 5 8 1/4 11 3/8 14 1/2 17 5/8
5/16-24 8.2 8.38 8.3 5 1/2 8 7/8 12 1/4 15 5/8 19
3/8-24 9.78 9.96 9.8 6 7/8 11 15 19 1/8 23 1/8
7/16-20 11.43 11.63 11.5 6 5/8 10 5/8 14 5/8 18 1/2 22 1/2
1/2-20 13.03 13.26 13.1 7 7/8 12 3/8 16 7/8 21 3/8 25 7/8
5/8-18 16.26 16.48 16.3 9 14 1/8 19 a quarter 24 a quarter 29 3/8
3/4-16 19.43 19.68 19.5 9 3/4 15 1/8 20 5/8 26 31 1/2

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