On Sat, 18 Jun 2011 17:35:21 -0700, Ivan Vegvary wrote:

I looked at the link that you provided and am totally confused. Quote:
"Suppose you want to impress a diamond knurl on a 1"-dia. shaft and the
distance between each tooth of the knurling tool measured, with
calipers, along the roller's axis is 0.060"

How do you measure the distance between each tooth "along the rollers
axis"? The teeth are on the rollers circumference aren't they? What am
I missing?

Suppose the axis of the diamond-pattern knurl wheel is parallel to the
lathe's x axis. The teeth of the knurl are at some angle to that axis,
say 35 degrees. If you orient your caliper at 35 degrees when you
measure tooth separation and you measure 0.0344", then along x the
tooth distance is 0.0344/sin(35) ~ 0.060", which apparently is what J.
A. Harvey in http://www.proshoppublishing.com/articles_knurling.html
is talking about measuring.

However, in the articles about straight knurls, the pitch used in the
calculations is tooth separation measured along the x-axis, and it
seems to me that's the relevant pitch for diamond knurling too. For
both straight and diamond knurls you can get that number by dividing
(pi*D) by the number of teeth, where D is a diameter of the knurl wheel.

--
jiw