Drilling holes at an angle in sheet brass

[Susquatch]

I'd be looking at making a punch and die fixture

I agree. Especially since the brass will be "perforated" on an angle. A punch & die would be ridiculously easy to make and use. To save on stock making the die, I'd consider a wooden pony block to hold a much smaller steel die and position the brass sheet.

 

[YYCHM]

I agree. Especially since the brass will be "perforated" on an angle. A punch & die would be ridiculously easy to make and use. To save on stock making the die, I'd consider a wooden pony block to hold a much smaller steel die and position the brass sheet.

What's so easy about making a punch & die? https://canadianhobbymetalworkers.com/threads/failed-shim-punch-project.1103/

 

[Susquatch]

What's so easy about making a punch & die? https://canadianhobbymetalworkers.com/threads/failed-shim-punch-project.1103/

Wow, that was quite the experience!

But I didn't say all punch and die jobs were easy. Just this one.

I'm not sure I would have tackled your challenge that way at all. I think I would have been inclined to make a cylinder the right OD and ID, and then lop off the required number of shims using a parting blade. But who knows, even that might be harder than it sounds. If it didn't work, I'd start by adding a wood or plastic or aluminium or even a cast core to control the inside burrs and deformation of the shims.