Know that square and hex broaches exist but what about rectangular? Could I make one or who could I buy one from.
Know that square and hex broaches exist but what about rectangular? Could I make one or who could I buy one from.
Greenlee makes rectangular punch and die sets, but I don't know if they have the size that you need.
https://www.greenlee.com/us/en/recta...-punches--dies
20 years as machinist and haven't heard of rectangular broaches. For sheet metal, like Scott says the punches. For thicker material I would take it a laser/waterjet shop or EDM for precise hole. I am assuming you want square corners.
To make one would be challenging. Keeping it straight through heat threat and then grinding each tooth for size and relief.
I do not see any reason you can not make one from a 8mm square one if you are talking a rotary broach. If you mean a push broach use a 6mm one. then end up with 2mm of shims on one side.
Bill D