1. CHAPTER 6
Tools and Equipment

2. Thread Repair
6-24
Inspect the condition of the threads and determine the repair method.

3. Thread Repair
6-24
Determine the type and size of the thread to be repaired. Thread pitch gauges and vernier calipers may be used to measure the thread.

4. Thread Repair
6-24
Prepare materials for conducting the repair: dies and taps or a drill bit and drill, cutting oil, if required, and inserts. Select the correctly sized tap or die if conducting a minor repair. Run the die or tap through or over the thread; be sure to use cutting lubricant.

5. Thread Repair
6-24
If using inserts, select the correctly sized insert. Drill the damaged hole, ensuring the drill is in perfect alignment with the hole.

6. Thread Repair
6-24
Cut the new thread to hold the insert using the appropriate tap. Make sure you use cutting lubricant if required.

7. Thread Repair
6-24
Using the insert-installing tool, install the insert by screwing it into the newly cut threads. Make sure the insert is secure or locked into the hole using the method specified by the manufacturer.

8. Thread Repair
6-24
Test the insert to ensure it is secure and the bolt will screw all the way in.