.

Just watched the videos you did with threads and knurled finishing - Impressive stuff. You must come from an engineering background as you made that look so easy too, even working with fractions that i have to faff about with for hours. Landscaper v's Draughtsman = Embarrassed landscaper. LOL

Nicely done OSTexo

Martin

Thanks for the links Michael - Excellent stuff

Martin

Hi Michael, will have to try this cutting solid with solid some more, I normally end up having to loft or blend holes left by cutting objects. It was 3am after all - That's my excuse and i am sticking to it lol

Martin

Edit ... Eureka! - That's what i am looking for, now i feel reel dumb and need to coin Homers catch phrase DOH!

Hello,

Just a great deal of trial and error. The Wikipedia article on screw threads helped me a great deal to realize that instead of having to use a calculator for anything all that was needed was the base pitch number and everything else is ratios. I also thought it would be good to have MoI do the precise calculations for me rather than rely on pen and paper. FelixPQ was kind enough to send me some engineering handbook scans as well for reference.

Well here is my result, I got bored and decided to play with my nuts :¬)

Also this link may be of use to someone else with what was our conundrum ... http://www.roymech.co.uk/Useful_Tables/Screws/Hex_Screws.htm

Martin