It is currently 29 Mar 2024, 06:00
9fingers wrote:Chairs and stools can certainly be a challenge certainly compared to most other projects.
I've only done a few (3) and the lack of 90 degree joints and reference planes can be a right pain.
Looking at the stool, the backrest, if that is what it is, looks way too low for any degree of comfort. More of a handle or guard to stop you slipping off after too many sherbets.
Good Luck
Bob
9fingers wrote:The Elka leg and seat joints to me are a "form over function" type design with horrendous stress in the joints at the top of the legs. Absence of a foot rest rail will make it a bit uncomfortable to sit at unless the seat is low enough to keep feet flat on the floor.
Whilst searching on behalf of a UKW member the other day I came across this link with helpful dimensions for furniture to fit humans.
http://www.cawspi.org/Furniture%20Design.pdf
I'll ask DeeJay to put it into the dropbox on the next update as I think it might be a pretty helpful input to design.
Bob
9fingers wrote:I have to agree that it does look well done. Bit pretentious basing it on antlers though
I'd avoid studding unless really chunky stuff.
Remember the core diameter of studding is the thread size minus the thread pitch ( for 60 degree metric threads) so your M8 for example is on 6.75mm core. Now M12 (x 1.75 pitch) would be 10.25 mm core.
Looking at cross section care area M12 is 2.3 stronger than M8
Not sure it gains much having nuts and washers in the seat part compared to gluing in with real mans full lead epoxy and I'd extend the rods as much as possible consistent with being able to accurately drill the mating holes at the right compound angles in the legs and back rest.
If say you used concrete re-bar with a nice textured surface designed for the concrete to grip onto and should be cheap a chips at a real builders merchants, then you would have a really strong result getting on for 3.2 x stronger than M8 studding. (possibly more as re-bar steel is probably higher carbon steel than MS studding. MG might know?
I look forward to the video of the 6-8 axis CNC router and the chips flying when making this for you Rob!
It will be one of those jobs that only you and a handful of forum readers will know the grief and stress input to get the result.
Bob
9fingers wrote:Yes proper araldite* left for 24 hrs or if you do end up needing serious gap filling properties, then West epoxy with a bucket full of filler stirred in.
*Although I'm in the Araldite fan club, it has been around for many many years. One of my earliest recollections is there always being a pack of this magic glue in the bureau when I was a child so the formula has be be at least 60 years old, possibly longer. There are possibly better high performance engineering epoxies around these days.
Bob
Rod wrote:I always fancied making one of his rocking chairs but never got round to it. Philly started one but I don’t know if he ever finished it.
DaveL wrote:Rod wrote:I always fancied making one of his rocking chairs but never got round to it. Philly started one but I don’t know if he ever finished it.
I asked Phil about it the last time I saw him, he stopped working on it when he realised he would not be able to get it out of his shop once he had finished it!
RogerS wrote:How long are your steel bars, Rob ?
That Axminster cutter is a brute ! I've used mine on 200 year old oak and it went through it like butter. I've got in mind to use it to remove some very old and incredibly hard yew stumps !
Woodbloke wrote:RogerS wrote:How long are your steel bars, Rob ?
That Axminster cutter is a brute ! I've used mine on 200 year old oak and it went through it like butter. I've got in mind to use it to remove some very old and incredibly hard yew stumps !
Yep, it certainly is but great for ruffing out the basic shape. The longest 12mm steel dowel is about 230mm and joins the rear legs up through the seat and into the uppermost block. I've sat on it and there's no 'give' anywhere and all stuck together with epoxy from Poundland, which has to be the best value epoxy out there - Rob
RogerS wrote:
That's a seriously long piece of dowel...guess my concern would be the relative short length in the seat. How does the seat fair if you try and swivel while you're sitting in it ?
DaveL wrote:Now that is beginning to look very nice.
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