Mark Z. wrote:

Specifically, I want to apply 30 degree and 45 degree chamfers to the
inner circumference of holes I have drilled in wood pieces. The holes
range in diameter from ¾" to 1".

This one will get you 41 degree chamfer, but its kind of spendy:

http://www.leevalley.com/wood/page.a...240,42281&ap=1

Chris