I've got a project coming up that involves a lot of medium-small holes in several 4x8 sheets of 5/8ths baltic birch veneer. (
I don't have the plans in front of me, but I recall that the holes are about 1 inch nominal or a little larger.) I think I have plan for making the holes: careful marking out of a grid, and then lots of forstner cuts with a jig. I'll have a sacrificial sheet of cheaper plywood underneath to minimize tear-out.
The holes are for dowels which, ideally, will slide in with a pretty tight interference fit. To make this slide easier (the idea is that the dowels can be moved) I'm thinking about chamfering the holes. I think this will look nicer, too.
I saw on a YouTube video someone using what looks like a dedicated tool for this purpose, but I can't quite tell what it is. Maybe a small router, but I have no idea what tool would be mounted in it. I'm pretty sure I don't want to do this with my router, as I'm certain any bit I can get for that will start to climb-cut, and then there's me with fewer fingers again.
I found this older question that gets to the heart of what I want to do: clean up the internal top edges of cuts in decent quality plywood, but in my case I'm hoping for a mechanised solution for multiple smaller diameter holes for ease and consistency.
Does anyone have any good ideas for light chamfering the facing edges of lots of medium diameter holes in baltic birch veneer?