HELI-COIL INSTALLATION TOOLS
There are two types of Heli-Coil tools supplied in kits -threaded mandrel type and prewinder type.
The prewinder tool is supplied in some coarse and all fine thread kits and sets. These inserts must be reduced in diameter before they are threaded into the tapped hole.This is accomplished by winding the insert through a set of threads called a prewinder at the front of the tool. Generally, coarse thread inserts can be installed just as they come from the package so a simple threaded mandrel type tool is supplied in the kit or set.
INSTALL
Install the appropriate length insert from the kit. Use the installation tool supplied in the kit or set. Wind the insert into the hole until the top coil is1/4 to 1/2 turn below the top surface.
