I just bought a 1/4" spiral upcutting bit from Grizzly's clearance site.
I was using it on a router table to lengthen the slot on a 1/2" thick
featherboard. I had the bit set so it was just barely above the top of the
wood. Since it is supposed to have a 5/8" cut, that should be okay, and it
looked okay. I had the featherboard against a fence, intending to cut one
side and then flip it over to do the full slot.
However, it was just barely cutting, so I was about to take it out and put
in a straight bit, when it grabbed the featherboard, bounced it around for a
second and then spit it out at a high speed, cutting a slot clean through it
as it went.
No harm was done, except to the trashed featherboard, but it was a little
Any ideas what I did wrong? I would guess that the cut wasn't 5/8" as
claimed, but it looks to be that long. Or is this simply why it was on
clearance? I bought the bit to cut groves as part of tongue and grove
joints because I thought it would clear chips better than the straight bit,
but am a bit leery of that now
A related question; I had have always heard that you should set a bit so it
is not quite in all the way. On a straight bit like this, I had trouble
doing that. Any tricks? Thanks.
Interestingly, my spell checker objects to "router". You would think that
it would be in there for a network router at least.