LumberJocks

Dining table inspired by the Greene & Greene Thorsen table #13: Final Table Edge Routing

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Blog entry by TungOil posted 05-29-2017 10:55 PM 1368 reads 0 times favorited 3 comments Add to Favorites Watch
« Part 12: Table Edge Assembly Part 13 of Dining table inspired by the Greene & Greene Thorsen table series Part 14: Assembling the Leave Edges »

With the table edges assembled, the next step is the final pattern routing of the outside profile. I route the final shape after the edges are assembled to be sure the ellipse is smooth and continuous. I start by leveling any minor misalignment between the edges with an 80 grit disk on the random orbit sander. The assembled table top is about 1/16” larger than the outside pattern to allow for the final shaping.

I use a solid carbide spiral upcut bit to get the smoothest finish on the outside edge and minimize any issues with end grain tear out.

To be sure I do not tear out the end grain, I add a backer made from one of the table edge scraps off the bandsaw. I use a tapered shim against another scrap to be sure the backer is tight against the table edge before I route the end grain.

The spiral bit produces a very clean cut.

After the final pattern routing is completed, I add a 1/8” radius to the outside edge.

Even with a fresh spiral bit, the edges of some of the square holes show some tear out after the final pattern route. There was no tear out on any of the drilled holes, so the cutting action of the square chisels must weaken the material around the hole enough that the router pulls it away.

Lesson learned- do not punch the square holes until after all of the routing is complete. It’s a simple fix- my 3/8” square plugs will be opened up to 7/16”.

I put the table halves together to take a look at how the finished table will appear. So far so good.

Next step: Route the slots for the splines, enlarge the 3/8” plug holes to 7/16 then assemble the edges on the leaves.

-- The optimist says "the glass is half full". The pessimist says "the glass is half empty". The engineer says "the glass is twice as big as it needs to be"



3 comments so far

View pintodeluxe's profile

pintodeluxe

5328 posts in 2533 days


#1 posted 05-30-2017 03:39 PM

That’s quite an undertaking! Good job on this detailed and complex project.

-- Willie, Washington "If You Choose Not To Decide, You Still Have Made a Choice" - Rush

View EarlS's profile

EarlS

465 posts in 2067 days


#2 posted 05-30-2017 05:06 PM

The picture of the edge with the round over really shows how precise your work is and how tightly everything fits together. Spiral bits aren’t cheap but they sure do make a nice finish.

I’m looking forward to seeing how you route the spline slots.

-- Earl "I'm a pessamist - generally that increases the chance that things will turn out better than expected"

View Mean_Dean's profile

Mean_Dean

5545 posts in 2867 days


#3 posted 06-04-2017 09:37 PM

She’s coming along beautifully!

-- Dean -- "Don't give up the ship -- fight her 'till she sinks!" Capt James Lawrence USN

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