Rocking Chair Build #8: Router extension

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Blog entry by Topapilot posted 11-07-2011 06:38 AM 3094 reads 1 time favorited 3 comments Add to Favorites Watch
« Part 7: Fixing mistakes, or How to look like a Pro! Part 8 of Rocking Chair Build series Part 9: An hour of prep, 10 minutes of panic... »

This modification to my router table allows me to use a round over bit on the legs, even though they are much wider mid-way along the length.

It consists of a riser block mounted to the table using two of the four standard mounting holes. Using all four would have been possible, but I wanted to be able to instal and remove this for normal operation. By using only two bolts, the router mount does not fall off the bottom of the table during change over.

The riser block is two pieces of 3/4 ply glued together and glued to 1/4 masonite. The four holes in the masonite are transfered from the original clear router base. The extension collet is necessary to raise the bit up to the level of the riser block.

The real trick was the hole for the bit. I wanted it to be sized for the round over bit with no extra space taking away from the surface area or for things to fall into. I intended to run the bit up from the bottom, first a bottom cutting bit to cut a hole big enough for the bearing to fit through, then a second time with the 5/8” round over bit. The problem was, the bit and standard collet was too short, but the collet extension made it too long to even start. I finally got it done, but it too all day… Now I want to make two more, one for the 3/4” round over bit, and one hand-held for the 3/16 round over bit.

As you can see, you can route really close to the seat joint.

3 comments so far

View HalDougherty's profile


1820 posts in 3290 days

#1 posted 11-07-2011 12:59 PM

I like your fixture to route the roundover on a curved piece of wood. Did the plans for the chair show the jig, or did you come up with the idea? After you build all the jigs and fixtures to build a chair, you are going to have to build more of them… Looks like the start of a chair factory to me.

-- Hal, Tennessee

View Topapilot's profile


172 posts in 3894 days

#2 posted 11-07-2011 05:14 PM

Hey Hal,
There was a picture of the riser in the manual, but no details. He also shows it in his video, but like the modification to the band saw to allow the table to tilt right and left, there is no detail.

I’ve had to find/make storage for the templates, jigs, and fixtures I’ve already made, and I can see at least a half-dozen more in my future. I figure I’m going to need to make at least 5 chairs to feel like I got my jig investment back, and to feel like I really know how to make this rocking chair.

View fernandoindia's profile


1081 posts in 2997 days

#3 posted 11-08-2011 07:23 PM

Hi Robb. Good decision of starting this building. Thanks for posting. I am also wanting one. Be watching the series.

-- Back home. Fernando

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