Thanks Bvas
Z-- These burs are made for cutting fiberglass.
you can feel the difference when you get to the fiberglass but it goes threw it easy.
When you break threw the back of the riser you need to slow down unless you have overlays on.
Stic I use the same speed that I had for using the pattern sander, the bits look like they would make a ruff cut but it makes a smooth
here is where I got them, there are only 2 of the 1/4" shank on that page, I got both
http://jpaulfennell.com/Raspburs.htmlKen it's at the very beginning of the post 40/45#
Flem-- take the chuck out make sure the taper surface is smooth (no burs) and up in the hole also.
open the chuck up like for max bit size ( so the 3 jaws are not sticking out) , put it in the freezer over night, swing the table out of the way, have a heavy hammer and a piece of hard wood, get the chuck out of the freezer, and as fast as possible get the chuck in the hole, hold it up with the hard wood and drive it up hard with the hammer.
If it won't stay in after that the taper was not cut precise enough.
Thanks guy's