Making a threading dial

[Mayhem]

(09-02-2012, 07:16 AM)stevec Wrote: Mayhem, I'm certainly not "calling" you on this but I'm having trouble picturing a leadscrew of 2 tpi. The leadscrew on my 16 x 60 is 1.5" in Dia. and it's pitch is 4 TPI and I'm trying to picture the helix of 2 tpi.
What's the Dia. of your leadscrew?

I'll have to go and measure it Steve but here is a photo of one of the half nuts from when I stripped her down:

   

Here is a pic showing the leadscrew when I had it chucked up to clean it but it isn't the best.