|Project by KnickKnack||posted 09-23-2011 07:50 PM||4089 views||6 times favorited||7 comments|
I’ve long been fascinated by the Rietveld Joint – you have to respect a guy who has an actual joint named after him, doubly so since, in its purest form, it’s a theoretical joint you can’t even make!
The idea of using it in a tray has been bobbling around in the fuddle of my brain for quite a while, so I decided, finally, to make it.
In theory it’s all very easy – just a load of square cross section lumber joined by dowels, right? The problem that had been holding me back was how to embed the tray base within the structure – I “solved” this by making the two bottom sections slightly higher (4 mm to be precise – the width of the ply base) – everywhere you look, you see the 20mm square cross section since it’s also recessed by the 4mm into the next tier of wood.
Since the perfect Rietveld joint is technically impossible to make, I decided to go with through and through dowels everywhere – 20 in all. I could flush them, but beech dowels against pine don’t stand out very well, so I decided to make my own jatoba dowel caps – 40 of them.
I did this by putting a square offcut in the drill, and sanding, sanding some more, and then more. Once the piece is basically a cylinder it gets a lot easier – sand to 6mm diameter, saw off a ~5mm slice – repeat – 39 more times!
I’d toyed with the idea of staining the different pieces of wood in “red/blue” style colours. I even asked a question here about how I might sand after staining, but there seemed to be no good solution. The wife wanted to stain the base blue (to go with the kitchen, like that’s a good reason), but even she agreed when it was being trial fitted that it wouldn’t be right. All this was lucky, i think, it looks fine “au natural”.
Just for a change glue-up wasn’t too much of a challenge – 90° things clamp pretty well – the biggest problem was that, as seen in the last but one picture, that was all of my small clamps being used just for one end.
Pine and jatoba. Portuguese Oil finish. 50cm x 25cm x 6cm high.
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