On 22 March 2017 at 02:55, Chris Albertson <albertson.ch...@gmail.com> wrote: > I missed the beginning of this thread. But the thing used to cut square > internal corners is a "broach".
Yes, I know. And I have both used and made them in the past. http://bodgesoc.blogspot.de/2014/11/the-last-bits-and-pieces.html But this is a short, blind hole. I am pretty sure that a wobble-broach would have worked well, but at £8 + VAT + delivery I decided that I couldn't be bothered to make the parts. (Especially as the cam profile appears to be non-circular but not defined by the standard) I have attached the relevant page, but I would be surprised if it gets through the mailing list software. -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the especial use of mechanical geniuses, daredevils and lunatics." — George Fitch, Atlanta Constitution Newspaper, 1916
D1-Cam.pdf
Description: Adobe PDF document
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