On 3/14/2010 1:49 PM, Evodawg wrote:
Anyone having trouble with Porter Cable Router Colet holding bits tight?
I
was routing a wood frame built to hide the edge of a beveled mirror for a
large bathroom mirror. I do remember tightening the bit and all was going
well with a 1/2" rabbiting bit/with bearing and without any warning, (but
expect I wouldn't get any anyway) the bit went flying off damaging the
area I was routing and spinning to the other side and taking a large nick
out of that side. This was an expensive piece of maple trim from Craft
Maid and to say the least I was ****ed! After a time out to calm down I
thought back and reflected I was really lucky not to get nailed in the
face by this flying projectile. This is a newer Router, 693 Porter Cable
using the fixed base. Needless to say, I torque the bit more than what I
thought necessary when I decided to continue. Wondering if anyone else
has
had this problem or was it operator error?

You probably already know this but Lonnie Bird's book, "Illustrated Guide To
The Router",
says that the router bit shank should be no more than 2 thousandths off of
the collet bit size, ideally
1 thousandth off. So at least .498" in your case. Perhaps, the problem is
just with the one bit?

Bill