Quote:
Originally posted by Joel:
Michel...

The extension is from MLCS.

www.mlcswoodworking.com

There is a model that holds 1/4" bits and a model that holds 1/2" bits. Both models are to be used in a 1/2" router. They extend the bit about 2". Cost $35 They are, or were, on sale for $25.

They also sell carbide spiral upcut bits. They have a 1/2" diameter, 3" long, 1-1/2" cutting length for $35.

I'd be very interested in how the router approach works for you.

Joel
Thanx for the help. Will try the extension. I plan on using 2 routers for each mortise. The first with a collar to dig up to 3 inches, then grab the heavy duty router to continue deeper. Plan to remove chips with air pressure, pop out the center (when practical ) with the grain using the chisel (after the perimeter has been removed.) Will also try to hollow out the center with 1" bit on 1/2 drill.