The special tap and installation tool are used to tap and install the steel wire screw sleeve. The screw sleeve is installed in the screw hole or nut, which can reduce the uneven stress and impact vibration of the screw thread, improve the fatigue strength of the thread, reduce the wear and corrosion resistance of the thread. Prolong the life of screw hole.
Screw sleeve installation tool
The basic principle of the installation tool is to make the steel thread through a section of guide thread, force the outer diameter to shrink, so as to install the bottom hole smoothly. It is divided into manual and automatic installation wrench.
What is the scope of application of the steel wire insert?
After long-term working test on the product, the steel wire screw sleeve has reliable structure, good performance and convenient use. It can be used in product parts of various industries. Products with screws are its objects. For example, it can be used in:
Aviation industry, shipbuilding industry, national defense industry, automobile industry, hardware and electronics, various machinery
Classification of steel wire inserts
(1) Classification according to the use function of steel wire insert
A. Helicoil free running inserts marked "fr"
B. Helicoil screw lock inserts marked "SL"
(2) According to the material classification of steel wire screw sleeve
A. Cr Ni stainless steel material: through the combination of strength and material, it is used under normal conditions, and under light type structure, aluminum alloy structure, sea water, chlorine containing liquid and increased corrosion resistance.
B. Copper alloy material: it is used when copper is required or screw connection with rotation is often adjusted; it is used when conductive or self-lubricating is required.
C. High temperature alloy material: heat resistant at 500-750 ℃; for aerospace assembly technology, aircraft engine, internal combustion engine turbine compressor at 750 ℃.
(3) Classification according to thread system of steel wire thread insert
A. International standard ISO "m, MJ" series steel wire thread insert
Thread series mark "m", "MJ"; spark plug thread thread is in this series
B. Unified thread series
Coarse thread mark "UNC", fine thread mark "UNF", superfine thread mark "UNEF"
C. The thread mark number of British standard pipe thread without thread seal is "g"
(4) Classification according to the direction of rotation of steel wire insert
A. Right hand thread insert
B. Left hand thread insert
(5) According to the classification of the installation handle of the steel wire insert:
A. Steel wire screw sleeve with mounting handle
B. Steel wire insert without mounting handle
(6) Classification according to whether there is coating on the surface of steel wire insert
A. Surface uncoated steel wire screw sleeve
B. The surface has coated steel wire screw sleeve, such as: silver plating, cadmium plating, etc.