I designed this tool (in fact a bit to mount on a drill or a router) especially for kuksa carving, but I can imagine it can be a great help for anyone who wants to drill big smooth holes in wood.

All you need:
- drill
- angle cutter
- heavy duty clock drill
- piton or bolt
- a few screws
- a piece or carbon steel

Step 1: Cut It Out

Never throw anything! Years ago I found on a flee market an old machete, handforged and perfect to 'turn into something else one time': perfect for this project.

Clean it up, and drill a disc out of it with a clock drill. Don't forget to lubrificate while drilling.

Step 2: Pitonize

Cut a groove in the top of a heavy diameter bolt.
Insert the disc, drill two holes in both (side to side) & smash a few autoscrewing screws or pitons in it to uniform the whole.

Dirty but effective!

Step 3: Sharpen & Ready to Go!

Sharpen the edges - on the counterclockwiseside, of course - and mount the device on a router or column drill.

Power ON, highspeed & go!

NO NEED TO TELL THAT THIS DEVICE IS AS DANGEROUS AS HELL.
WEAR GLOVES & HOLD THE PIECE WITH BOTH HANDS, IT DOESN'T MAKE A DIFFERENCE BETWEEN WOOD & MEAT.

Enjoy this tool.
Woodcarving will never be the same...