Nice use of peel mill,

I've used the same type of path 1.0" deep in 4340, .05 stepover, 100 ipm @ 4200 rpm on a minimill. .50 dia 5 flute.

All the Dynamic paths are awesome to work with!

Edit, grumpy this morning, sorry to yell at you!!

Did you run the prog in the machine graphics 1st?

I realize it's a long prog, but you may have a value that gets just close enough (over)the y limit to alarm it out.

Or, a diff work offset in the prog?

Edit, how old is the machine?

Flowline is your friend here, easy to apply, easy to change

So currently we are tapping NPT threads on our VMC. It seems to work well for threads from 1/16 NPT to about 3/8. I've got to do a couple 3/4 NPT threads and I want to threadmill them. Threadmilling NPTs is kind of a new area for me, so I have a couple questions:

 

First off, what is the preferred practice regarding the taper of the hole before threadmilling? Taper or no? If yes, then what is the diameter that is at the top of the hole? Is the tapdrill size the big part of the taper or the small end?

 

Secondly, I've got a chart that says for a 3/4 NPT tap, one would go 15/16" deep. Would I want to threadmill that deep, or more specifically, what is the depth that one would go using a threadmill? The handtight engagement?

 

Thanks in advance.

Here's a link to the folks who know threadmilling to a T

http://www.vargus.com/vardex/

Good luck, hope this helps.

Who is this guy y'all speak so highly of??????

He didnt even know where the switch was when we met, and now, he get all these kudo's???!?!?!?!?

Seriously, one of the finest and smartest people I have ever had the opportunity to be taught by!!

All hail V6.1!!!

Thanks for being patient with me James, you truly are a wealth of information.

Darrell Reid

Reid Machine

www.reidmachine.com