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multimachine · Open Source machine tools

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Group Information

  • Members: 7030
  • 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

Most Recent Messages

  (View All)
Re: basic measurement tools
... Good list! I will differ with you on the flat needing to be granite. I have seen cast iron and glass flats used with good effect in the past. Dave 8{)
Posted - Wed Jun 19, 2013 4:24 am
David G. LeVine
sirdave144
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Re: precise measurement
... Bruce, in addition to 1-2-3 blocks, some V blocks and a dial test indicator would be in the "essential" range. For metric, 25-50-75 mm blocks. Once you
Posted - Wed Jun 19, 2013 4:21 am
David G. LeVine
sirdave144
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Re: precise measurement
... Indeed. I have a set and would not be without them. There are SO many things they can do! Since mine will bolt together, I can make angle braces easily.
Posted - Wed Jun 19, 2013 4:15 am
David G. LeVine
sirdave144
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Re: quality of threaded rod
My ancient Pratt & Whitney 880 "precision bench lathe", a jumbo watch style lathe, uses triangular threads. So do the smaller Prazis. I don't think there's
Posted - Wed Jun 19, 2013 12:26 am
Chris Tofu
rampaginggre...
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Re: quality of threaded rod
Acme threaded rod typically is available in 3 precision grades, 2G, 3G, and 4G. There are other grades also but they are not as common. Most general purpose
Posted - Wed Jun 19, 2013 12:15 am
Bruce Bellows
snookered1ca
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Message History

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2013 169 28 115 129 115 135
2012 112 37 99 139 125 154 85 62 21 161 131 129
2011 341 188 285 107 172 188 124 209 171 179 155 52
2010 115 115 93 90 205 216 370 321 181 157 95 147
2009 511 537 423 344 417 333 326 193 150 303 377 149
2008 236 299 288 362 72 102 144 100 137 113 267 351
2007 128 111 86 114 138 196 174 76 85 94 129 69
2006 141 65 197 81 54 48 42 97 44 277 254 218
2005 1 9 7 71 271 172 209 216 197 114 151 217
2004 1 4 1 2

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