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#1
05-02-2012, 11:58 AM
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a good material for gears...
Hallo dear paper friends!
I am working on a project involving a rather complex gear train. I would like to test the functioning of the gears without spending a lot of time with paper (that will be the final target...). I need a material easy to cut (possibly by means of the usual cutter) and sufficiently compact to ensure the test success. I tried a kind of polistyrene, but it tends to crumble..., so it does not work. The gears have a diameter of about 15 cm, and a thickness of about 1-1.5 cm. Any suggestion? Thank you very much! All the best! PINO 
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#2
05-02-2012, 12:27 PM
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Balsa or Bass wood?
__________________
Put on hold build (someday I'll finish): F-35A Lightning II 1:72 Previous builds: cMags' Card Model Builds
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#4
05-02-2012, 01:43 PM
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i would use this stuff that is air dry plumber epoxy putty.
7 bucks a 8''x1'' tube, grey in color, drys hard as rock. make a positive, or use a gear, then squish this stuff together with a window open make mold. 4 hours later, grease it and mash some more up and push into the mold. out pops your gear a few hours later. jim
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#5
05-03-2012, 05:54 PM
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Epoxy is good, but:
You could use plaster or Rock Hard Water Putty (if it is available in Europe) to make the mold, it is cheaper than epoxy. Varnish or wax the mold and mash your epoxy mix into the cavity.
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#6
05-03-2012, 08:32 PM
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Check out Grandt Line power train stuff
GRANDT TRANSMISSION COMPONENTS
__________________
I'm an adult? Wait! How did that happen? How do I make it stop?!. My Blog: David's Paper Cuts My paper models and other mischief
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#8
05-22-2012, 05:22 AM
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You could use illustration board you know the black and white stuff comes in two thicknesses or you could use what cMags said balsa or bass wood.. here no cheap balsa forced to use boards
F-22 nut
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#9
05-22-2012, 06:21 AM
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I have tried many times to make paper gears and cogs, with very limited success. I've gotten one gear to turn by hand, but nothing that can handle a motor (the axle's stick and such, and need the reactive increase and decrease of pressure that you can do by hand.) I've had better luck with paper chain drives and gears. Either way you have to make your gears absolutely perfectly circular and the axle's exactly at the center. By using chain (and by chain I mean a paper belt with holes punched in it.) you have a little more room for mistakes.
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