Tap drill depths for taper reamed NPTF threads
Tap drill depths for taper reamed NPTF threads
(OP)
I have some standard minimum tap drill depths I use for up to 1 1/4 NPTF taper reamed internal threads. I'm looking for standard minimum tap drill depths for the larger sizes up to 3" and I can only find an old chart in my files for NPT threads and it is largly illegible.
Thanks in advance.
Thanks in advance.





RE: Tap drill depths for taper reamed NPTF threads
Matt
CAD Engineer/ECN Analyst
Silicon Valley, CA
sw.fcsuper.com
Co-moderator of Solidworks Yahoo! Group
RE: Tap drill depths for taper reamed NPTF threads
http://www.osgtool.com/Technical.asp?tid=1
http://
RE: Tap drill depths for taper reamed NPTF threads
RE: Tap drill depths for taper reamed NPTF threads
There is some very good information here that should cover you requirements.
RE: Tap drill depths for taper reamed NPTF threads
Looks like I can get what I need from this stuff.
RE: Tap drill depths for taper reamed NPTF threads
The ME Threads program is very good and inexpensive. It would be a great asset if you deal in threaded fasteners very much.
I was taught, a long time age, that on pipe threads that you use the rule of 12's. Count up 12 threads, measure and drill to that depth.