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Milling formulacalculator

I have a metal tube with threads on both sides (male and female). See attached picture. I need to attach this to a drill bit. The female threads will be facing out and the male threads will be closest to the drill bit.

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Feed rate formula forturning

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RPMformula for milling

Get a flat disc style sandpaper attachment. Then attach to that. If it’s plastic epoxy will work. If it’s metal need something more substantial. Also depending on what you are doing go with an impact or drill/driver instead and epoxy your thing to an appropriate diameter socket.

Then you can also braze or weld to attach.Or with two similar sizes (say attaching to socket) you could use.a wide shaft collar and set screws.