Chrislynn Repair Kits contain everything needed to complete your repair job except a drill bit. This includes a high-speed steel STI plug tap, a combination installation/tang break off tool, and a generous quantity of inserts, in a length equal to one and a half times the diameter of the insert. These kits are available in metric sizes from M2 to M64, and in American sizes from 2-56 to 1-1/2?. Larger ?8-Pitch? sizes up to 3-1/2? are also available.
The first step in creating a new, stronger thread is cleaning up the original, dam- aged threads. This is done with a standard drill, the size of which is indicated on the Precision package. The hole is then tapped with an oversize (STI)* tap provided in each kit. Kits do not include drills. Drills are available through your Precision Helical Thread Insert distributor. The free diameter of the Precision insert is larger than the new threaded hole, but it is easily ?wound? into place with the inserting tool provided.
Once in place, the insert tends to spring back to its original diameter, giving it a very strong grip in the hole. Finally, the driving tang is broken off by tapping downward with the end of the inserting tool. If necessary, inserts can be re- moved, using one of the extracting tools available.