HELICOIL® Plus thread technology Intelligent system solution comprising a fastener and efficient processing for high-strength screw joints

HELICOIL® product spotlight Strength and precision at their best. You need a high-strength screw joint? You need to reinforce or repair threads? Your solution: The HELICOIL® thread technology HELICOIL® Classic HELICOIL® Plus Free Running and Screwlock Free Running and Screwlock

HELICOIL® product spotlight For 70 years, HELICOIL® thread inserts have proven their value in practical applications. They are available in the Free Running and Screwlock versions. Moreover you benefit from our innovative system approach with every single HELICOIL®. With the HELICOIL® thread technology, users all over the world therefore obtain intelligent system solutions comprising a fastener and efficient processing for numbers of pieces ranging from “1 to 1 million”. There is a solution to almost every task related to this coil thread technology. HELICOIL® Tangfree HELICOIL® Smart Free Running...

HELICOIL® history

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HELICOIL® technology Can you imagine a world without screws? Still today, the screw is the most widely used fastening element for detachable joints. Especially in modern lightweight construction optimised tightening methods and high-strength screws allow for continuous improvement. Considerably higher forces can be transmitted so that the size or total number of needed screws can be reduced. However, only high-strength nut threads permit to achieve high-strength screw joints. Our HELICOIL® thread technology is just the right choice here. Your advantages — an overview ■ High thread loading ■ Increase...

HELICOIL® technology The HELICOIL® thread insert, which is made from a wire with rhombic profile, is formed into an elastic spiral. The Free Running version has a completely free running coarse thread throughout all threads. The result is a true-to-gauge internal thread. The thread insert produces high-strength threads transferring forces from flank to flank into the holding thread. The special thread start allows to position it like a screw and screw it in. To screw in the thread insert, only the respective installation mandrel of a similar size as a tap is required. All stages of the HELICOIL®...

HELICOIL® thread inserts — advantages in detail M MA A Wear resistance HELICOIL® thread inserts are made of austenitic chrome-nickel steel (minimum tensile strength 1,400 N/mm²). The high surface quality of the rolled nut thread ensures a high-strength, wear-resistant thread with an extremely small and constant thread friction torque. Therefore, a higher and constant preload-force is achieved for reuse at an equal tightening torque. At the same time, the utilisation of the yield point of high-strength screws is improved, while the torsion stress is considerably reduced. Compared to tapped threads,...

HELICOIL® thread inserts — advantages in detail Tight fit In not installed condition, the outside diameter of the HELICOIL® exceeds the holding thread size by a defined measure. In combination with the high spring force of the material, this difference in dimension causes a radial expansion and therefore a tight and zero-clearance fit in the nut thread. Additional locking elements or adhesive are therefore not required — as they usually are for fixed bushings. If you use impact wrenches, please contact us. We will be happy to assist you. Friction The thread friction as well as its dispersion...

HELICOIL® thread inserts — advantages in detail Downsizing Engineers can choose almost any material. The HELICOIL® corresponds to the enduring trend toward lightweight construction (e.g. aluminium and magnesium) because this method of thread reinforcement combines minimum space requirements and high strength. This allows the optimum use of high-strength screws also in low-strength materials. Fv Example: M6 property class 10.9 with HELICOIL® Plus Example: M8 property class 8.8 without HELICOIL® Your advantages: Fewer joints and smaller screw sizes save material, installation space and weight —...

HELICOIL® thread inserts — advantages in detail Screw loss protection The HELICOIL® Screwlock variant is a coil thread insert that prevents the self-screwing-out of screws so that they are not lost. HELICOIL® Plus Screwlock Polygonal-shaped, resilient threads If the HELICOIL® thread technology is combined with polygonal-shaped threads clamping the flanks of the screwed in screw, a high friction grip results. That resilient friction grip leads to prevailing torques which are similar to the specifications in ISO 2320 as well as to the requirements in technical delivery conditions stated in international...

HELICOIL® thread inserts — variants HELICOIL® Smart Free Running* This new thread insert merges the advantages of the HELICOIL® Plus and the HELICOIL® Tangfree. Every thread of the thread insert with a precision-formed, rhombic profile is free running. The result is a true-to-gauge internal thread including the last thread which is in every case threadable. Like the HELICOIL® Plus, the HELICOIL® Smart features a special thread start so that the installation into a holding thread is easier. There is a tang, but it does not need to be broken and removed. The installation time is therefore reduced...

HELICOIL® thread inserts — variants HELICOIL® Tangfree Free Running** No tang is required for the installation of these thread inserts. Therefore, neither a tang break nor a tang removal are required. Combined with the suitable installation tools, this innovation level of the HELICOIL® technology is an ideal addition to the HELICOIL® product family. HELICOIL® Tangfree Screwlock** The HELICOIL® Tangfree Screwlock has the same advantages as the HELICOIL® Tangfree. In addition, there is an area for screw loss protection. One or several polygonal-shaped threads clamp the flanks of the screwed in...