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Post by Pete on Jan 15, 2015 1:28:39 GMT
I have bought myself a kaleidoscope kit to make for my granddaughter, it is causing me a bit of a headache the long sleeve is 180mm long 32mm centre and 34mm external
I have done the shorter tube that holds the lens which is equally thin walled, but short enough to run a forstner bit through then turn down the outside, I stabilised it by making an insert to fit the tail stock up to.
problem is I don't have a forstner bit long enough to get 180mm nor can I find one, and the final wall thickness is too thin to hollow by feel and hope...
any suggestions welcome... I have several wallnut toilet roll holders with holes in where my 32mm became 33.5mm somewhere in the length of the tube then went through as I shaped the outside, and am out of ideas.
Pete
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Post by Rob on Jan 15, 2015 1:47:11 GMT
Cant you make it in sections (short enough for the forstener to go all the way, do a simple join at each intersection like a box lid ie the following section slips over the previous one with a tight fit. Re mount and insert your tailstock custom piece to stabilise then turn down the outside with the "lids" already in place so you get a perfect outside cylinder with matching grain. In other words like making a box but with say 3 sections instead of a base and lid...this would be 3 bases where each base fits perfectly into the next one.
Oh and of course glue them once finished turning |
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Post by phoneman on Jan 15, 2015 9:24:28 GMT
Pete,
I searched on the Lee Valley site ("Forstner bit extensions"). They sell three extensions, one of which is 150 millimeters. That might solve your problem
good luck,
phoneman
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Post by Pete on Jan 15, 2015 19:50:22 GMT
Thanks both, I will try the extension route first. but the sections idea is also good but with the wall thickness being 1mm there would not be a lot of glue surface.
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mcb
New Member
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Post by mcb on Jan 16, 2015 0:49:44 GMT
Thanks both, I will try the extension route first. but the sections idea is also good but with the wall thickness being 1mm there would not be a lot of glue surface. Perhaps I'm stupid but don't quite see why you could not make the tube thicker. If necessary you could make it taper at the end(s) to the thickness you mention. This would make the device more robust too; does your granddaughter ever throw her toys around? MC |
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Post by Pete on Jan 17, 2015 20:49:36 GMT
Purely aesthetics, its the shape I remember from my childhood, of course they were cardboard with plastic lens this is a bit upmarket with glass lens and mirrors. Granddaughter is careful with stuff I make for her, so it will be looked after, though I may make it a 2mm wall instead :-)
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mcb
New Member
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Post by mcb on Jan 18, 2015 18:31:07 GMT
Purely aesthetics, its the shape I remember from my childhood, of course they were cardboard with plastic lens this is a bit upmarket with glass lens and mirrors. Granddaughter is careful with stuff I make for her, so it will be looked after, though I may make it a 2mm wall instead :-) I have seen Kaleidoscope kits where the wood is turned into an EGG SHAPE. That's likely to be more robust.. But it's your project MCB |
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Post by Pete on Jan 19, 2015 19:14:33 GMT
I have seen Kaleidoscope kits where the wood is turned into an EGG SHAPE. That's likely to be more robust.. But it's your project MCB I have seen those, but I like a challenge  or I am a glutton for punishment one or the other... This is the 2 tubes with mirrors lenses etc. proper old fashioned kaleidoscope that won't compete with the modern electronic wizardry available to kids today, so it will give me more fun in the workshop than my granddaughter will ever get from it. I have bought 2 kits, one for me hopefully, or one for the bin! as I knew it was going to be difficult, but I have the excuse to buy more tools and thanks to Phoneman's suggestion I am awaiting a Forstner bit extension that may come in handy for future projects too. |
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Post by phoneman on Jan 20, 2015 0:18:23 GMT
Pete,
I have a superstition that if one has a backup at the ready, the first kit or part will not break. I hope your spare ends up giving you pleasure rather than ending up in the bin.
With such thin walls, you are indeed courageous!
I have been a very satisfied Lee Valley customer for twenty years. I knew they are primarily Canadian, with a strong US presence. I did not realize they are also based in Great Britain. I hope the forstner bit extension works well for you. Please continue posting.
phoneman
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Post by Pete on Jan 20, 2015 17:45:03 GMT
Lee Valley don't reach as far as the UK but the search led me to an extension at Axminster tools, which oddly enough didn't turn up the part on their own site search, until I had the Lee Valley criteria so perhaps they are linked in some way.
I like to push my luck, with the right timber I have done a number of pieces with 1mm wall thickness depending on shape it is actually surprisingly resilient, though of course knot free, even grain, and well seasoned or known tree part (trunk not branch, or at least the end of a branch so not much compression)is a must.
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Post by Rob on Jan 20, 2015 19:49:10 GMT
Actually Lee Valley are here....veritas :-)
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mcb
New Member
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Post by mcb on Jan 21, 2015 0:43:37 GMT
Lee Valley don't reach as far as the UK but the search led me to an extension at Axminster tools, which oddly enough didn't turn up the part on their own site search, until I had the Lee Valley criteria so perhaps they are linked in some way. I Have discovered that Axminster have a number of items in their catalogue which are Chinese copies of quality US/Canadian items MC |
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Post by dalboy on Jan 21, 2015 17:11:32 GMT
Who,s kaleidoscope kit is it
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Post by Pete on Jan 21, 2015 18:53:27 GMT
Who,s kaleidoscope kit is it This one, Turners Retreat, Possibly Craft Supplies in the USA |
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or I am a glutton for punishment one or the other... This is the 2 tubes with mirrors lenses etc. proper old fashioned kaleidoscope that won't compete with the modern electronic wizardry available to kids today, so it will give me more fun in the workshop than my granddaughter will ever get from it.