Dan1954 wrote:
Hello,

I just joined DIY and I have a question on tools. I am considering
making my own and possibly selling wood guitar tuner buttons. The
problem I have is on the shaft side of the button is a 3/32" x
5/32" rectangular shaft slot with rounded ends.
http://img.photobucket.com/albums/v3...ttons-hole.jpg.
I was looking at mortising bits but they are just too big. How would
anyone go about making this hole? Thanks in advance for you help.

Dan

Dan, it would be hard for the wood not to split when torque was applied
to that shape of hole.
I like the round hole idea, filled with epoxy.

r