Coil threaded inserts - VVG StarCoil

High-strength for design and repair

Coil threaded inserts or “coils” are an outstanding solution for achieving highstrength joints in parts made from low-strength materials (e.g. aluminium lightweight constructions). At the same time, high wear resistance is guaranteed. Furthermore, the inserts are ideally suited for the repair of damaged threads.

Very simple handling

Coils consist of a specially formed and coiled wire with a driver pin that can be removed after installation and can be fitted quickly and easily in just a few steps.

1. Drilling

The necessary bore is prepared using a twist drill selected for the diameter and pitch of the required coil size.

2. Cutting

The holding thread is cut into the bore using the VVG thread tap. We recommend the use of cutting oil here.

3. Installation

The threaded insert is positioned on the VVG installation mandrel and screwed into the bore using the driver pin.

4. Breaking

Finally the driver pin is broken off using the tang break-off tool at the predetermined breaking point and removed.


The sturdy VVG universal handle and the matching tool kit allow flexible and mobile use on site.

Battery tool

The VVG quick-change adapter allows the tool kit to be used even with existing cordless screwdrivers.


We also offer special automation solutions for individual demands in industrial series production.