Figure 1. Removing Old Threads
Drilling operations produce high velocity flying debris which can become lodged
in the skin or in the eyes. All personnel working in the area must wear protective
eyewear, gloves, and long sleeves when performing drilling operations. Failure
to comply can result in serious injury to personnel.
4. Drill out the damaged threads (figure 1, item 2) using the drill bit (figure 1, item 1) selected in step 3. Chamfer
the hole with a standard countersink (82° to 100°).
5. Tap new threads in the hole using the tap (figure 2, item 1) selected in step 3.
Figure 2. Tapping New Threads