Why is it a secret ?? - Router Forums
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post #1 of 11 (permalink) Old 04-15-2017, 01:05 PM Thread Starter
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Default Why is it a secret ??

Hi all, newbie here with first post. I'm glad to have found thus forum! I have been going through router tables, some I make others I get from CL or inexpensive sources. My question is with my Porter Cable 890, why is it a secret what the measurements are for the mounting screws? I have literally been looking for over two years, when the time comes to remount and drill.......carefully and measured 3 times.

What would you all do? Does anyone have the dimensions? It sure would be great to have a printable paper template to use and take the anxiety out of drilling into the router table base.

Thanks and looking forward to making some new friends here. I appreciate your responses. Tony in the OC
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post #2 of 11 (permalink) Old 04-15-2017, 01:28 PM
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Hello and welcome to the router forum.
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post #3 of 11 (permalink) Old 04-15-2017, 01:31 PM
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I don't think I've ever seen a schematic that shows that for any router and I don't know why that is. Most of us, I think, use the black plastic base plate as a template. I bought a set of transfer punches to make sure I center the hole when I'm marking it onto a plate. They aren't terribly expensive and come in handy from time to time. Transfer Punch Set - Lee Valley Tools

With some routers you can attach a guide bushing to the base plate and stick the bushing through a pre drilled hole in the table plate to fit it and that will keep the base plate in position while you mark or drill the holes.

Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.
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post #4 of 11 (permalink) Old 04-15-2017, 02:02 PM
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Hey, Cuz; welcome!
Tons of previous threads and comments in the archive re the whole topic of plates and mounting them.
Good luck!
(You did check the replacement parts approach to finding the screw info? If you can take the screw into a decent hardware store, you should be able to find the correct nut, which will tell you all you need to know about the screw threading.)
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post #5 of 11 (permalink) Old 04-15-2017, 02:13 PM
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I'll leave this to the experts . But welcome to the forum Tony

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Ok ,I never insulate
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post #6 of 11 (permalink) Old 04-15-2017, 03:04 PM
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I've always used a centering disk or cone, coupled with screws with the heads cut off and sharpened to a point. Thread the sharpened screws in, install the centering tool and place the insert plate on and give a sharp rap at each screw. Drill where the marks are.

Brian


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post #7 of 11 (permalink) Old 04-15-2017, 03:25 PM
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Tony,

I use the sub base from the router as my pattern. Here is some data that might help. It is from a 690, but I am 99% sure the holes are the same, just the screws for the 890 are metric and the 690 were imperial.
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File Type: pdf 690 PC base.pdf (30.0 KB, 66 views)
File Type: zip PC 690 base.zip (15.4 KB, 31 views)
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post #8 of 11 (permalink) Old 04-15-2017, 03:38 PM
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post #9 of 11 (permalink) Old 04-15-2017, 05:59 PM
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I use a pencil to mark the hole, then whack a nail in the center of that, to mark where to drill. Never had a problem with doing it that way yet.

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post #10 of 11 (permalink) Old 04-15-2017, 09:22 PM
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Welcome to the forum Tony.

Ross,
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Enjoy the knowledge of others that can be found within.

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