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View Full Version : Porter Cable 690, loose height adjustment clamp?


Jeremy Huff
07-17-2016, 6:51 PM
I just installed a used pc690 into a router table and upon first fringe it up, the router lowered 1/8 an inch in 5 seconds of operation.

I am tinkering with it now... maybe it wasn't clamped completely, or maybe there is adjustment to be made, but I would prefer experienced input before I stand in front of the thing whIle it is running.

Is there a way to tighten the router's adjustment clamp? I see instructions for tightening the plunge base, but not the solid base.

Thanks.
Myk Rian
07-17-2016, 9:18 PM
Look for an adjustment screw on the clamping lever.
lowell holmes
07-19-2016, 5:29 PM
You might contact Pat Warner. He has a post in this group now.
Bill Neely
07-20-2016, 5:08 AM
Loosen the clamp, tighten clamp screw - test and repeat until the clamp snaps shut with a fair amount of force. When I had a 690 I replaced the clamp screw with a ratcheting lever.
pat warner
07-20-2016, 9:46 AM
Thumb screws for those castings are way under-rated and dangerous.
The LR casting has an over-center lock lever that works.
I use a 6270K14 (http://www.mcmaster.com/#catalog/122/2242/=13d4ey8) on the 1001 casting; you'll have to make a square nut to facilitate!
Nuthin's easy.