rookie mistake

[Limited-Time]

Re: rookie mistake

picker,
If you use a 29/64 drill bit, along with a collar type "stop" you can safely drill out the bad threads. You will need to measure how far in the threads are damaged. You can do this by inserting a the correct bolt and marking how deep in it goes. Then transfer that length to the drill bit, measuring from the full diameter portion of the bit back. Be sure to add about a thread to a thread and a half (1/16" to 3/32") to the measured distance to insure you remove all the damaged threads. Go slow and make sure the stop is secure on the drill bit. Another option is to use a piece of pipe as the stop. Cut a length of pipe that allows just enough of the bit exposed (the measure thing again) to remove the damaged threads. A piece of wooden dowel (sp) rod will also work. Just use the 29/64 bit to drill the hole in it. Good luck.

 

[picker523]

Re: rookie mistake

picker,
If you use a 29/64 drill bit, along with a collar type "stop" you can safely drill out the bad threads. You will need to measure how far in the threads are damaged. You can do this by inserting a the correct bolt and marking how deep in it goes. Then transfer that length to the drill bit, measuring from the full diameter portion of the bit back. Be sure to add about a thread to a thread and a half (1/16" to 3/32") to the measured distance to insure you remove all the damaged threads. Go slow and make sure the stop is secure on the drill bit. Another option is to use a piece of pipe as the stop. Cut a length of pipe that allows just enough of the bit exposed (the measure thing again) to remove the damaged threads. A piece of wooden dowel (sp) rod will also work. Just use the 29/64 bit to drill the hole in it. Good luck.

sounds like you've done this a time or two. I'm going to first get the correct tap and try to tap out the bad part . If that doesn't work I'll go that route. so I need a 7/16-20 tap...right?

 

[Coors]

Re: rookie mistake

And the 2-handed handle that they have; sometimes, if you are twisting from one side, enough torque will snap the tap. Be sure to keep backing it out, in order to clean out the shavings.

 

[Limited-Time]

Re: rookie mistake

sounds like you've done this a time or two. I'm going to first get the correct tap and try to tap out the bad part . If that doesn't work I'll go that route. so I need a 7/16-20 tap...right?

Yah, I'm working on my PHD from The School of Hard Knocks. Yes a 7/16-20 tap is what you need (I'm deferring to Don on the tap size). Be warned if you cross thread the holes (easy to do with a sharp tap) while attempting to correct the threads lead in, your screwed. I would go the drill bit route first, but hay thats just me. Good luck.

 

[mystro]

Re: rookie mistake

I'd be tempted to have a machineshop tap it if it looks buggered enough..just considered it done and move on.