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Centering your router on a mounting plate

41973 Views 61 Replies 37 Participants Last post by  niswanger
It is very important that your router be centered on your mounting plate. Many people sweat over this for hours remeasuring before they drill their mounting holes. The quick and easy way to do this is with a centering kit from Rousseau. These kits work with all brands of mounting plates that accept Porter Cable style guide bushings and they cost $5.

Step 1. You chuck up the centering pin in your routers 1/4" collet.
Step 2. Insert the disk into the center hole of your mounting plate.
Step 3. Remove the sub base plate from your router, set it and the screws aside.
Step 4. Install the transfer screws into your routers base with the points facing out.
Step 5. place the centering pin into the disk, position your router to face the direction you want it mounted and lightly tap the edge of your router with a mallet. This marks the locations you need to drill.
Step 6. Drill the holes, flip the plate over and slightly countersink them.
Step 7. Using the new screws that came in the centering kit attach your router and it is perfectly centered.

If you are using a plate that accepts the larger Oak Park style guide bushings you can purchase a centering disk and a guide pin from them. You can purchase transfer screws from most hardware stores or tool suppliers.


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Hi Dean

That's big NO NO, the bit must be in the center,and in dead center a 1/28" is a big deal when it comes to dovetails...unless you like making fire wood.. :)

It's like using a bent jig saw blade,like they say junk in junk out..


Did you ever use a dovetail jig with an out of center dovetail bit?

Not that I know about but you can make your own very easy with some 1/4" plastic and a 1/4" bolt that you can chuck up in the router to get on dead the way a 3" hole is a bit small now days it should be 4" for the big panel bits that are 3 1/2" to 3 5/8" now days..

Use a hole saw to cut the disk out of the plastic stock.. HOLE SAW SET - 16 pc Hole Saw Kit- 3/4" - 5" inch - includes Case: Home Improvement


Someone gave me a Sears Craftman router plate and it has about a 3 inch hole in it which seems a bit larger than some of the alignment inserts I have seen. I wanted the plate to get the router higher into the work and wanted a bigger opening for a panel bit. Are there larger alignment inserts available? What are the available sizes?


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