"woodchucker" wrote:

Where do you get that limitation?
it's got a 1.5 ring.. but you can go sans the ring, or buy another
and open it up..
I didn't see a 1" limitation.
----------------------------------------------------
Bit RPM.

The 690 operates about 22-25,000 RPM.

Once the bit gets bigger than a 1/2" cove/roundover,
the bit mfg starts limiting the bit RPM to about 12,000, maybe less.

The 3 HP routers can go a low as about 8,000 RPM which allows
use of those 3" dia. panel bits.

Lew