I'm new here and fairly new to the trade, so I wanted to make some sort of contribution. I hope this can be of benifit to some one. One of my instuctors at school has a website that will instantly calculate threading info for any Unified and ACME thread, along with spur gear and bolt circle calculations. There are also some calculators for data that is related to small hobby size engines, mostly airplane engines.
Chip's Ahoy!
Sonny
"somedays you're the pigeon and somedays you're the statue"