- Use a general purpose thread repair kit. These kits
are available commercially.
Caution: Wear safety glasses in order to avoid eye damage.
Important: Refer to the kit manufacturer's instructions regarding the size of the
drill and tap to use.
Avoid any buildup of chips. Back out the tap every few turns and remove
the chips.
- Determine the size, the pitch, and the depth of the damaged thread.
If necessary, adjust the stop collars on the cutting tool and tap to the required
depth.
- Drill out the damaged thread. Clean out any chips.
- Tap the hole. Lubricate the tap with light engine oil. Clean the
thread.
- Thread the insert onto the mandrel of the installer. Engage the tang
of the insert onto the end of the mandrel.
Important: The insert should be flush to one turn below the surface.
- Lubricate the insert with light engine oil (except when installing in
aluminum) and install the insert.
- If the tang of the insert does not break off when backing out
the installer, break the tang off with a drift.