USNmechanic
Aluminum
- Joined
- Dec 1, 2016
I’ve been restoring a 9A for the past couple of months. Everything has been going pretty well so far, but I’ve had to deal with an issue of removing a broken tap from the blind hole in the cross slide used to attach the threading stop. It came that way when I bought it, and a previous owner had even drilled and tapped another hole next to it (which I will fill in before painting).
To remove the tap, I started with a carbide burr in a die grinder. That got a little hard to control though, so I moved to my radial arm drill press and used an angle plate to position the cross slide under the chuck. I then pecked away at the tap with much better success. I believe I removed all of the tap, but I would like to confirm the depth of the hole. As it is right now, the hole is ~7/8” deep. Does anyone out there know if this is how deep they came from the factory?
I would also like to confirm that the thread should be 5/16-18. Most of the threads were removed during the grinding, so I plan to install a helicoil this week once I know the correct thread type.
Thanks, I appreciate the help!
-Keith
Sent from my iPhone using Tapatalk
To remove the tap, I started with a carbide burr in a die grinder. That got a little hard to control though, so I moved to my radial arm drill press and used an angle plate to position the cross slide under the chuck. I then pecked away at the tap with much better success. I believe I removed all of the tap, but I would like to confirm the depth of the hole. As it is right now, the hole is ~7/8” deep. Does anyone out there know if this is how deep they came from the factory?
I would also like to confirm that the thread should be 5/16-18. Most of the threads were removed during the grinding, so I plan to install a helicoil this week once I know the correct thread type.
Thanks, I appreciate the help!
-Keith
Sent from my iPhone using Tapatalk