That is normal. Maybe you can hit it again with a brad point or forstner bit
to get rid of the collar.
Ted

"David" cosmosatnointerbaunspamdotcom wrote in message
...
Hi folks,

I'm using a General mortising machine and I'm wondering if this is what I
should be getting
as a mortise?

I've adjusted the chisel and bit with the .40c method and tried a few
variations but I still end up with that little collar
at the bottom of the mortise.

I've sharpened the chisel using the Lee Valley cone sharpeners, I've
gently tuned up the bit so that it is sharp.

http://i13.tinypic.com/2z7pmab.jpg


Anyone have some suggestions as to what I might try to correct this?

I hope the picture is of sufficient detail.

Thanks for your time,

David.