I absolutely horrible at math so trying to figure out the multiple gear thing is a non starter. Wouldn't even know where to start. Although that would probably be a very good thing to know. Wish I knew it.
Ron, I have an excellent book for guys like us. It's called Mathematics for Machinists
, written by Rueben W. Burnham.
I fully understand the trouble you have with this. This book is written for us, and the fellow who wrote it knew that we are
machine shop guys, and not mathematicians. It's in language for 'real' people!
You can find them on Amazon for about $16.00. Lindsay's books also has them, and is where I got mine. They only have
it in their paper catalog, though. You can also find it on Google books in a pdf. That's nice, 'cause it is no charge, but I like
having a real copy to keep in the shop.
It's worth the money. A great reference for the shop.