Brochure

Structural component – thread reinforcement and repair

HELICOIL

is thread reinforcement and repair.

Threads are reinforced whenever low-strength materials (e.g. aluminium, aluminium-magnesium alloys and fibre-

reinforced plastics) are used. The nut thread is wear-resistant even in cases of frequent use. HELICOIL

allows

miniaturisation and lightweight construction for the development of production parts. The HELICOIL

thread insert

has been tried and tested for more than 60 years and has become a widely used structural component.

Worldwide, HELICOIL

thread inserts are approved for economical and lasting repair of damaged or worn out

threads.

Apart from repair of valuable individual components, parts used in large-scale production which have been

rejected due to faults during thread production can be reintegrated into the production process.

Technology

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 thread insert is a wire with rhombic profile formed

into an elastic spiral. It 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 a tap of the same nominal diameter. However, existing tools

of the commonly used design can still be used for installation. Thanks to the considerably wider range of tools to

be used for installation, installation times are up to 20 % shorter than for previous methods.

If through-hole threads are required, after installation, the tang can be broken off at the notch (predetermined

breaking point).

HELICOIL

Plus produces high-strength threads transferring forces from flank to flank into the holding thread.

It is a highly reliable system for which German and international industrial property rights have been filed.

HELICOIL

Plus are thread inserts produced according to consistent material and quality specifications and meet

the requirements of national standardisation as well as aeronautical and military standards. Apart from

that, leading large-scale users base their manufacturing standards on this system.

= min. tensile strength 1400 N/mm² (1 N/mm² equals 1 MPa)

HV = Vickers hardness 425 HV 0.2 min.

= roughness depth approx. 2.5 µm

= reduced thread friction, results in increased preload-force FV

at constant tightening torque

= reduced torsion stress in the screw shank

HELICOIL

thread inserts

Defective thread Repaired thread