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+--- Thread: 5C Collet Thread Specs (/thread-1555.html)
5C Collet Thread Specs - EdK - 07-31-2013
Does anyone know what the minor diameter is for the outside thread on a 5C collet? It's a 1.238-20 thread but I can't seem to find a minor diameter for it. I know there's a formula for calculating it but that escapes me at the moment.
Ed
RE: 5C Collet Thread Specs - Mayhem - 07-31-2013
Take a look here ED Marv probably has a calculator programmed up already...
RE: 5C Collet Thread Specs - EdK - 07-31-2013
(07-31-2013, 06:42 AM)Mayhem Wrote: Take a look here ED Marv probably has a calculator programmed up already...
You beat me to it Darren. I just visited that thread and thought I'd post the formula for others to enjoy.
TD = MD - 0.013*DOT/TPI
where:
TD = tap drill diameter
MD = major diameter
DOT = desired depth-of-thread expressed as percentage
Ed
RE: 5C Collet Thread Specs - Mayhem - 07-31-2013
Here it is as an Excel calc:
[attachment=5811]
Yes - I'm home alone and bored. Although, I've just found a 10.5" Douglas shaper for sale that I'm thinking of enquiring about...