Orlando

Thread Repair

General purpose thread repair kits are available commercially.

Warning: Refer to Safety Glasses Warning in the Preface section.

Note: Refer to the thread repair kit manufacturer's instructions regarding the size of the drill and which tap to use.

1. Determine the size, the pitch, and the depth of the damaged thread.
2. Adjust the stop collars on the cutting tool as needed. Tap the stop collars to the required depth.
3. Drill out the damaged thread.
4. Remove the chips.
5. Apply clean engine oil to the top thread.
6. Use the tap in order to cut new thread.
7. Clean the thread.



8. Screw the thread insert onto the mandrel of the thread insert installer. Engage the tab of the thread insert onto the end of the mandrel.

Note: The thread insert should be flush to 1 turn below the surface.

9. Lubricate the thread insert with clean engine oil - except when installing in aluminium - and install the thread insert.
10. If the tab of the thread insert does not break off when backing out the thread insert installer, break off the tab using a drift punch.