Needs Pictures: 0
Results 1 to 12 of 12
Thread: Art Deco Rounded Dovetail Detail
-
28th December 2018, 07:51 PM #1
Art Deco Rounded Dovetail Detail
Good Morning
About a year ago an acquaintance completed a small cabinet with very interesting rounded dovetail corners. Sort of like James Krenov meets art deco. Dereks duelling with rounded dovetails on his coffee table reminded me of it and, rather than hijacking Derek's thread, I have started a new one. Derek's is here:
Coffee table for my nephew
The technique may not be new, but it was new to me. I omitted to take photos, so have drawn it with CAD for my library file.
First, start with timber double the thickness of the final carcase and cut conventional dovetails on all corners.
Round Dovetails 1.jpg
Second, he then drilled vertically down the back of the dovetails with a forstner bit equal in diameter to the thickness of the timber. Next he rounded the outside corners of the dovetail.
Round Dovetails 2.jpg
Thirdly, he cut away the inside half thickness of the carcase to match the thickness in the dovetails.
Round Dovetails 3.jpg
The End Result is rather surprising whether viewed from the normal outside position, or the insides of the cabinet carcase.
Round Dovetails 4.jpgRound Dovetails 5.jpg
Note that the dovetails are also much larger than the apparent thickness of the timber would allow.
Appologies for the weird grain orientation in the CAD drawings but the CAD program has a mind of its own.
Fair Winds
Graeme
-
28th December 2018 07:51 PM # ADSGoogle Adsense Advertisement
- Join Date
- Always
- Location
- Advertising world
- Posts
- Many
-
29th December 2018, 04:40 AM #2
Thanks Graeme
Rather than waste half the thickness of each board, the other approach would be to cut about two inches (50 mm) off the end of each board.
and then fold each 2 inch block back on itself and glue to the back face of the board.
the disadvantage if this approach is that the bulges each end of the board would make aligning the 2nd board when transferring the dovetail layout a bit tricky.regards from Alberta, Canada
ian
-
29th December 2018, 11:25 AM #3
Graeme, that is brilliant. Thanks for posting.
I must confess that something like this is for me extremely daunting, and I take my hat off to anyone who manages it, especially hand sawing the dovetails.
Another issue is how to finish the interior surfaces (since I assume they are to be seen - the interior if my coffee table will not be seen). The waste would be removed by a bandsaw, which has a limitation in regard to resaw height. I assume that this has to be done after glue up - yes/no? Then smoothing the interior ... scrapers, sanding ... ? It would not be possible to hand plane.
The drilling would be a challenge for the best drill press, not only for accuracy, but for depth.
Perhaps this could be done with a CNC machine ..
Regards from Perth
DerekVisit www.inthewoodshop.com for tutorials on constructing handtools, handtool reviews, and my trials and tribulations with furniture builds.
-
29th December 2018, 03:34 PM #4
Good Morning Derek
The rounded dovetail was on each of the four corners of the carcase of a small Krenov inspired display cabinet in Tas sassafras, so that the inside dovetail was reasonably visible, especially when the doors were open. I don't know the maker and suspect that I was not given full information, perhaps even some disinformation.
A fuller explanation of what I was told is:
- Cut all dovetails,
- Assemble carcase dry and clamp,
- Clamp sacrificial plug in corner and drill out with forstner bit, [I didn't question whether he drilled from one or both sides]
- Disassemble carcase and thin sides between drill grooves,
- Cut rebate for back of cabinet,
- Reassemble, glue and clamp,
- Plane dovetails flush and then route the round over.
It might be feasible to cut the inside curve after the dovetails are cut by routing with a round nose cove bit. But breakout and alighnment would be issues.
Sorry I cannot be more specific but I am reporting from a limited hearing and seeing, certainly not a doing (yet).
Cheers
Graeme
-
29th December 2018, 09:15 PM #5
- Clamp sacrificial plug in corner and drill out with forstner bit, [I didn't question whether he drilled from one or both sides]
I would love to know. It is an interesting concept.
Regards from Perth
DerekVisit www.inthewoodshop.com for tutorials on constructing handtools, handtool reviews, and my trials and tribulations with furniture builds.
-
29th December 2018, 11:24 PM #6
Hi Derek
It was a small Krenov type cabinet, only about 120 - 150 mm deep. Drilling is feasible, but certainly daunting.
Perhaps a first try should be a very small jewel Ray box?
I have been thinking about it for a year, have many solutions that won't work. The requirement for absolute precision on that inside corner seems almost insolvable.
Nor can I envisage the set up on a CNC.
Cheers
Graeme
-
30th December 2018, 11:06 AM #7Taking a break
- Join Date
- Aug 2008
- Location
- Melbourne
- Age
- 34
- Posts
- 6,127
Definitely not CNC, they don't have that much space unless you're talking about multi-million dollar machines.
If it's started accurately in a drill press, it could be finished by hand with an auger bit of the same size; the existing 100-150mm of hole would be enough to keep the bit straight.
-
30th December 2018, 06:58 PM #8
Moulding Plane
Hi All
Now way outside my experience. Would it be possible to use or modify a moulding plane with a round profile to shape inside the dovetail? Perhaps something like this:
https://hntgordon.com.au/collections...d-round-planes
Cheers
Graeme
-
30th December 2018, 07:16 PM #9
Hi Graeme
I plan to glue in a triangular filet, and then use a round moulding plane to shape the inside of the curved end ... similar to the HNT Gordon planes (I was hoping SOMEONE would send one for Christmas .. alas )
Regards from Perth
DerekVisit www.inthewoodshop.com for tutorials on constructing handtools, handtool reviews, and my trials and tribulations with furniture builds.
-
30th December 2018, 08:22 PM #10
Mount a trim router aligned on the diagonal of a squarish angle frame, the frame to ride along the inside corner.
Use a ball-end router bit.
Add waste blocks at each end of the height - limited by the length of the power cord.
Cheers,
JoeOf course truth is stranger than fiction.
Fiction has to make sense. - Mark Twain
-
31st December 2018, 07:08 AM #11
-
11th April 2019, 02:04 PM #12
Good Morning All
Just stumbled on a youtube of someone making these rounded dovetails using a bandsaw.
https://www.youtube.com/watch?v=5OLDMLEfhmQ
Makes it look real easy !
Cheers
Graeme
Similar Threads
-
rounded finger joints
By Ivor in forum BOX MAKINGReplies: 4Last Post: 16th May 2018, 11:40 PM -
Help sanding rounded edges!
By rabtoy in forum HINTS & TIPSReplies: 4Last Post: 4th November 2017, 08:54 AM -
How is the rounded/curved edge done?
By Kidbee in forum WOODWORK - GENERALReplies: 8Last Post: 29th January 2016, 07:27 AM -
Rounded Deck Corner
By SenojNW in forum DECKINGReplies: 3Last Post: 10th May 2007, 05:57 PM -
Template for rounded corner
By sailor in forum ROUTING FORUMReplies: 7Last Post: 6th December 2003, 05:48 PM