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How to correctly chamfer a hole?
I'm attempting to chamfer a hole in a cylindrical shaft, obviously very easy to do, that only reason I'm having a problem is that I'm trying to chamfer the correct distance all the way around the hole, rather than using a 90° tool and plunging straight down.
You can see from the pic what I mean, the smaller hole is what you normally achieve (the chamfer changes size on the way around the hole) but I'm trying to achieve much the same as the larger hole.
I'm trying to achieve this without cad/cam, is there a way to calculate this using a spreadsheet?
Thanks.