The hard part of compound indexing
Is when you find index number is not found on the chart .
yes, thankfully forums like this exist to point people in the right direction. I had not even considered compound indexing, and in truth, I've never had to divide a circle before now using a dividing plate. I didn't know what to even search for. the book i found on the subject didn't mention it (or i missed it)
Compound infexing is found in books dating back to 1900
You find this old machinest Hand book as late as the 1950's
perfect, thanks. I am going to try to find a copy along with the treatise of gear wheels and a couple others. It seems the old timers methods are still applicable today for the hobby user, even if it's not as relevant to current industry.