[Pat Roche]

Sorry if i repeat what someone else is saying....im short of time and didnt read the entire post...but you can simply use the drill motor alone(no clutch) and gear the two into a 1:1 ratio. From this point you can decide upon the rest of your gearing, etc.

If my memory is correct:
Drill no clutch:about 19000
Chip:about 5000
so its close to a 4 to 1 ratio
this means that the gear on the chip needs to be 4x bigger that the drill for a 1:1 ratio.

Hope this was helpful


-Pat