I am building a walnut cabinet with deep sides and tops ( 21″). I plan to join the tops and bottoms to the sides with through dovetails. I had to glue up the panels to get the desired board width and now I find I will have to do some hand planing to get the panels flat. Some will require more planing than others so the panels will not all be the same thickness. I don’t want to have to plane every board to the same thickness but I am not sure about dovetailing two boards of different thicknesses. I don’t think there will be a problem but wanted to ask around and see if anyone has run into difficulties in doing this.
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Replies
Not a problem.
In fact, antique drawers sometimes had sides that were thicker at the bottom than the tops. Instead of laying out the dovetails with a cutting gauge, the adjoining boards were simply butted up against one another and the layout line was marked directly from the other board. If you are careful, you should have no problems.
Regards,
Dan
I'd use half blind (lap) dovetail joints for this...
I thought about half blinds but didn't look forward to all the extra chisel work needed. I also felt that the exposed dovetails would be a nice indication of the quality of the work. Maybe that is not really a good viewpoint.
If you do decide to plane to uniform thickness gauge your thickness off the flattened face and plane a chamfer on the the other side just down to your gauged line on all four edges. Then all you have to do is plane down until the chamfer just disappears and you will be at finished thickness. This beats eyeballing the gauge line(s) the whole time you're working.
Edited 2/15/2005 3:23 pm ET by cstan
Sounds like a good tip. Will try it.
jackhall,
There's no reason the ends have to be the same thickness as the top and bottom, or that the top and the bottom be the same thickness. Just be careful to lay out the joints to match your stock.
An alternative to planing the thickest panel down to match the thinnest: Rabbet the ends of all the panels to the same thickness, on the inside of the panel. Then set the marking guage to this dimension when laying out the dovetails.
Be aware tho that the inside measurements of the cabinet will change with the thickness of the panels. Could make fitting doors and drawers...interesting.
Regards,
Ray
I had thought about using a rabbet on the back of each panel to get a common depth. That would certainly speed up the marking part of the job.
My 2 cents:
Don't bother to plane the boards to the same thickness, nor even just the ends. I once reproduced a Tennessee sugar chest in figured cherry that had a 1 1/4" thick top, 1 1/8" front, 1 1/16" right side, 1" left side and 7/8" back. The poplar bottom was inset into a 7/16 rabbet, flat on the inside, but varied in thickness from 1/2 on one end to 15/16 on the other, roughsawn surface underneath(imagine a raised panel turned downward). No un-necessary planning for that maker. (The chest was almost identical to the one appearing on Antique roadshow from Memphis just recently). This original chest was made from single boards, 15" wide, and I was fortunate to be able to copy that feature as well. My first piece replicated the original, even to thickness, but on the several I've made since used 7/8" material. It used half-blind dovetails at the front (not visible in front view) and through dovetails elsewhere.
Keeps it interesting!
John in Texas
Thanks John. Encouraging info.
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