Does anyone know how to put a small drill bit into the Dewalt router on the Xcarve?
I wouldn’t put a drill bit in a router, since it’s not a drill. I’d put a 1/8" spiral bit into a collet adapter. I have a 1/8-1/4 adapter that I use for dremel bits.
You need a collet or a collet adapter with the appropriate diameter.
Having said that, you’ll be limited to peck drilling operations and specific plunge speeds. Drill bits dont take side loads at all and no side cutting can be done with them.