A tapered drill bit.

[MWF FEED]

Hi everyone, I have been tasked to make a quantity of file and rasp handles for a guy with a mild hand disability to a design that suits him. Fairly normal except that it takes me so long to drill the tapered holes in four stages for the tangs. I was wondering if anyone could suggest how to make a tapered drill bit to do this in one go, or is it not feasible?
As usual, all help appreciated.
Thanks,
Rgds,
Crocy.


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