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Group Information- Members: 7031
- Category: Crafts
- Founded: Aug 17, 2004
- Language: English
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Description
Doing something for the world with machine-tool making techniques from the 1830s to the 1960s.
Your developing world school needs almost-free machine tools?
Your developing world factory needs unavailable spare parts?
You need a complex part that is too expensive to have made?
Need to bootstrap a factory but only have a few bucks?
No problem!
First came the Multimachine, a home-built milling machine that could be used as an all purpose machine tool. It was a 2007 Popular Mechanics DIY project of the year and the centerpiece of Maker Faire Africa in 2009. It could be be built using only automotive scrap and steel bar.
Our latest project comes from a forgotten but prize winning design for a 1915 cannon shell making machine that was made from concrete. It is a general purpose screw cutting metal lathe (the basis of all industrial production) that is built using only concrete mix and scrap.
Alternative methods of construction will be shown including one that needs no outside machining and one that uses no metal fasteners for the concrete form and very few screws, bolts or nuts.
Every technique we use has been proven for over 95 years.
Only a very small amount of welding, regular carpenter's and mechanic's tools and a $10 dial test indicator are needed.
A current "mini" project is the adaptation of an Asian "long tail" boat design for use in Lake Victoria (a lathe builder there needed a way to make a few bucks to buy tools and materials).
NOTE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
THE UPDATED "HOW TO BUILD MANUAL" IS AT http://blog.makezine.com/projects/the-multimachine-150-12-swing-metal-lathemilldrill/ (now 65,000 hits)
NOTE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
BE SURE TO READ the "How to Build a MultiMachine" booklet at the top of the list in the "Files" folder.
See a 75 minute long (but very amateurish!) video of the machine at http://opensourcemachine.org/the-multimachine/multimachine-video
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Re: quality of threaded rod
acme thread is avalible FREE, old office chairs use it, is just inst very long, about one foot, or 18 inches.
Posted - Wed Jun 19, 2013 5:41 pm
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louisrfnauto
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Re: quality of threaded rod
Hi Chris You asked about the accuracy of the threaded rod at home depot, it is about as good  as anything ..  The guys who talk about acme threaded rod
Posted - Wed Jun 19, 2013 5:19 pm
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keith gutshall
drpshops
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flat
ah, yes, precision flat i guess would be more accurate term, I have seen basalt, granite, cast iron, fused silicone, tungsten carbide, glass...
Posted - Wed Jun 19, 2013 4:25 pm
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pokerbacken
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Re: basic measurement tools
the twirl marker is fairly common in watchmaker/instrumentmaker toolboxes. The wobble-stick is also from that field, primitive but effective. found this after
Posted - Wed Jun 19, 2013 4:13 pm
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pokerbacken
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Re: An observation on drilling
Hi Adams That's what I trying to address, the small press drill can be reworked to run at slower speed not necessary to buy bigger drill press. Steve Wan
Posted - Wed Jun 19, 2013 9:06 am
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Steve Wan
wansteve...
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