There were a number of design constraints to finding a suitable alternative, notably that the inserts must conform to standards for corrosion and heat resistance in adverse conditions. It also had to have uniform load and stress distribution be wear free and have reject recovery. Finally, there is limited access because of the design of the component.
The solution Böllhoff developed uses the company’s HELICOIL® Plus, which has a reduced diameter first coil that allows it to be screwed into the hole without the need for pre-winding. This simplifies the tooling and insertion significantly. Because of this pre-winding, tooling is not required. This solved the issue of access to parts of the component.
HELICOIL® plus thread inserts create high-strength, wear-resistant, heat-resistant threads of highest precision. They are available in free running and screwlock version. The green or red colour allows easier identification when they are installed.
Benefits include:
- Corrosion and heat-resistant
- Wear-free
- Rejects recovery
- Uniform load and stress distribution
- Easy identification even when installed (thanks to colouring)
- Available in different variants for the most different requirements
- Assembly systems, tools, and products available from one source
HELICOIL® thread inserts are available with imperial or metric dimensions and as special designs.
HELICOIL® plus thread inserts have been developed in many different designs to and are commonly used to repair destroyed threads. The assembly of wear resistant HELICOIL® thread inserts provides increased thread loading.
Benefits include easy and fast installation; corrosion and temperature resistance; optimisation of thread characteristics.
The HELICOIL® Plus design features met all the technical specifications required for the application (to DIN 8140).
