On Oct 1, 12:04 pm, "
wrote:
On Oct 1, 7:08 am, "dadiOH" wrote:

I use two plunge routers...a Bosch 1611 1/2" and a Porter Cable base for 890 routers used with an old Black & Decker/Dewalt 1/4" router motor. I cut all manner of things with both and have not had any
problem with deflection.

One thing that PC seems to make that is a good qualtiy product is
their line of routers. Seems like they have to recall them a lot
(including the 890) but in the end they get them right.

I would think that your setup is out of whack someway. I use an old
Porter Cable plunger that I have had for years to mortise door hinges
all the time as part of my business. I also have a DeWalt (Elu) 625
plunger that is a as sturdy as a rock. Your 890 is a nice router,
well made and sturdy.

If you were able to cut the mortises with our other setup in a
satisfatory manner it would seem you have your technique down solid,
so it would seem to leave the router. Is there anything in the
collet? Are the slides moving freely? Is the plunge base attached
properly?

Robert

Everything is fine except the secondary bore on the plunge base there
is slop. It appears to have a plastic bushing. The primary bore is
bushed with bronze and is alot tighter. Ive worked in wood shops most
of my life, and never gave much thought to plunge routers. The few
times I have used them, I just kind of took them for granted, picked
them up and went to work, and never experienced a problem. Usually
though, it was an operation where this degree of accurqacy was not
required, such as butt hinges in a household door.