Porter Cable 890 vibration and recall
I recently obtained a PC 890 router that had a mild vibration - nothing serious, but not what I expected. Turns out, the early 890 routers have a recall - they say that vibration can cause insulation abrasion that leads to a electrical shock potential.
Here's what I think is going on - when I took it apart, the bearing was loose on the shaft and the shaft diameter was 19.98mm rather than the expected 20.00. Seems small, but might be the cause for the vibration.
Anyway, I contacted PC and am expecting a replacement. If you have an early 890 router, go to the PC website and check your serial number to see if its included. They will also want your MOD (made on date) number.
Looks like there's a lot of complaints about PC quality (look at the Amazon website). Probably should have got a Bosch.