HELICOIL® Tangfree
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The tangfree coil thread insert for high-strength threads – metric threads – imperial threads: UNC and U

® The HELICOIL Tangfree system System modules – the fastener A close look at the advantages Modular system Design guidelines Technical data and item numbers System modules – the tool Installation tools Electrical installation tools Pneumatic installation tools Installation tools with leader cartridge Extraction tools Small pictures: First development steps of HELICOIL® technology

® HELICOIL thread inserts Can you imagine a world without screws? Even today, the screw is the most widely used fastening element for detachable joints. Optimised tightening methods and high-strength screws allow constant improvement. Considerably higher forces can be transmitted so that the dimension or total number of required screws can be reduced. However, only highly sustainable nut threads permit high-strength screw joints. This is where our HELICOIL® thread technology is Your advantages – an overview: n n n n n n n n High thread loading Increased quality and value Wear-resistant, low...

® HELICOIL thread inserts Technology The HELICOIL® thread insert is a wire with rhombic profile formed into an elastic spiral. It produces high-strength threads transferring forces from flank to flank into the holding thread. The HELICOIL® technology with tang Thanks to continuous optimisation, the HELICOIL® Plus is now much easier to install. “Plus” refers to the special start of the thread compared to the HELICOIL® Classic. The HELICOIL® Plus is positioned and screwed in like a screw. To screw in the thread insert, all you need is an installation mandrel with thread dimensions similar to...

® HELICOIL thread inserts – a close look at the advantages Wear resistance HELICOIL® Tangfree thread inserts are made of austenitic chrome-nickel steel (minimum tensile strength 1,400 N/mm²). The high surface quality of the rolled thread ensures a high-strength, wear-resistant thread with an extremely small and constant thread friction torque. Therefore, a higher, constant preload-force is achieved for repeated cycles at the same tightening torque. The utilisation of the yield point of high-strength screws is improved. Torsion stress is considerably reduced. Compared to tapped threads, the...

Tight fit When not installed, the outside diameter of the HELICOIL® Tangfree exceeds the receiving thread by a defined amount. In combination with the high spring force of the material, this difference in dimension results in radial expansion and therefore in the tight and clearance-free fit in the nut thread. Additional locking elements or adhesive – as are common for fixed bushes — are therefore obsolete. If you use impact wrenches, please contact us. We will be happy to help you. Screw locking Free Running Thread technology and the polygonal-shaped thread of the HELICOIL® Tangfree...

® HELICOIL thread technology ® HELICOIL Tangfree Free Running** You do not need a tang to install these thread inserts. Therefore, tang break and removal are not required. Combined with the matching installation tools, the current innovation status in the HELICOIL® technology is a perfect addition to the HELICOIL® product family. ® HELICOIL Tangfree Screwlock** HELICOIL® Tangfree Screwlock has the same advantages as HELICOIL® Tangfree. In addition, there is a screw-locking area. The screw is locked by one or several polygonal-shaped threads clamping the flanks of the screwed in screw. The...

® HELICOIL Classic Free Running* Every thread of the thread insert with precision-formed, rhombic profile is Free Running. The result is an internal thread true to gauge that can be used from both ends. The dimensional stability of the ISO thread complies with DIN 13 6H as well as for special requirements with 4H and meets the demands on international standard specifications. ® HELICOIL Classic Screwlock* This thread insert has an additional screw-locking area. One or several polygonalshaped threads clamp the flanks of the installed screw. The elastically resilient frictional locking...

® HELICOIL modular system Metric coarse thread DIN ISO 13-1 Thread types The HELICOIL® has been tried and tested for more than 65 years and has become a renowned structural component. There is a solution to almost every task related to this thread technology. Metric fine thread DIN ISO 13 (T02–T11) HELICOIL® Plus Free Running Stainless steel A2 material No 1.4301 Stainless steel A4 material No 1.4571 HELICOIL® Plus Screwlock HELICOIL® Plus Thread technology for high-strength fastenings – metric threads Catalogue No. 0100 Thread technology for high-strength fastenings – metric threads...

HELICOIL® Classic Free Running HELICOIL® Classic Screwlock HELICOIL® Tangfree Screwlock Thread types Coloured: red, green, blue, yellow HELICOIL® Plus Repairing of damaged threads Catalogue No. 0180 http://www.boellhoff.com/ en/thread-repair THE BLUE BOOK Aerospace Buyer’s Directory to HELICOIL® Wire Thread Inserts Catalogue No. 0130 THE BLUE BOOK Aerospace Buyer’s Directory To HELICOIL® Wire Thread Inserts Repair solutions for damaged threads – repaired, better than new http://www.boellhoff.com/ the-blue-book Issue 3/Augu

® HELICOIL Tangfree thread technology Materials The overview table shows the most common materials with specifications. Minimum tensile strength at room temperature Temperature resistance Materials ¿ Stainless steel A 2 X5 CrNi 18 10 material No 1.4301 low temperature –196 °C short-term 425 °C long-term 315 °C low temperature –196 °C short-term 425 °C long-term 315 °C n Standard applications for all property classes and materials ¬ Stainless steel A 4 X6 CrNiMoTi 17 12 2 √ material No 1.4571 n General lightweight construction e.g. of aluminium, magnesium or aluminium alloys ¡ n Increased...