How To Install A Helicoil That Won’t Retract ?

No matter the application, if you’re dealing with an assembly that has seen its share of wear and tear, you may come across a stripped thread. When that happens, you should install a helicoil to create a new thread for a fastener to attach to. 

Here is how it works:

While it’s a great fix, when it comes time to remove the fastener, helicoils that have been in use for a long period of time can retract. 

The Solution

1. Drill the stripped hole per manufacturer’s recommendation

To start, you’ll need to drill the hole based on instructions provided to you by the manufacturer to ensure a proper fit. The suggested drill bit size will depend on the size of the thread needed, as well as the parent material. Be sure not to drill any deeper than the hole’s original depth. Once the drilling is complete, you’ll also want to rid the hole of any debris by blowing it out with compressed air.

2. Tap the drilled hole with the tap specified in the helicoil kit

Tapping is what cuts new threads into your hole. Be sure the tap is perfectly straight so your threads align properly. Gently turn the tap until you start feeling resistance. Once you do, slowly back the tap out and again blow out the hole with compressed air to get rid of any debris.

3. Insert the helicoil into your freshly-tapped hole

With red threadlocker applied, you can now insert the helicoil into your freshly-tapped hole. The cure time for LOCTITE 2620 depends on the temperature at the time of application, but we recommend waiting 24 hours to ensure full strength.