17 October 2016
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Large bolt problems solved at Engineering Design Show

Working with large bolted joints usually means an engineer having to arrange specialist electric, hydraulic or pneumatic bolt tensioning services. But with the new HEICO-TEC tension nut from the manufacturers of the HEICO-LOCK® range of anti-vibration wedge lock washers, these time-consuming and potentially expensive options are no longer required and using HEICO-TEC is so fast and simple that the nuts are often tightened in the same time it takes to set up such tooling.

The HEICO-TEC tension nut is unique in the fact that the pre-tension force of the large main thread is distributed to many smaller pressure bolts. Because these pressure bolts are smaller a conventional torque wrench is all that is needed to achieve the correct pretension force, eliminating the need for complex, bulky or heavy tools and makes securing large bolted joints more convenient and easy.

With HEICO-TEC the nut body is screwed onto the main thread just like a conventional nut – but it is not tightened. Several pressure bolts with associated pressure pins are arranged around the main thread inside the nut body. When the pressure bolts are tightened they push the pressure pins against the part to be tensioned and at the same time the bolt elongates. The pre-tension force created in this way is purely axial and therefore free from harmful torsion or bending. The HEICO-TEC nut includes an incorporated hardened washer that protects the tensioned parts from high pressure loads caused by the pressure pins.

Also HEICO-TEC tension nuts comply with ISO 898-2 requirements, meaning engineers can directly use any conventional nut from the same strength class.

Paul Windsor, Heico’s National Sales Manager, said of the launch "HEICO-TEC has received a lot of positive interest at the show, visitors are very impressed with the fact that they do not need specialist tooling to use the product, which brings cost and time benefits that all can see".

HEICO-TEC is available in sizes M30 – M76 and the company also provide an Assembly Template that helps installers tighten the bolts correctly, all part of the service from the Fastening Experts.

To find out more visit www.heico-tec.com or contact Paul direct.

Contact Details:

Paul Windsor – pw@heico-fasteners.co.uk

Tel: 07584 466884

Web: http://www.heico-tec.com

Heico Fasteners UK Ltd

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Heico Fasteners UK Ltd


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