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Umake

Gearbox Keychain XL

by Umake Nov 24, 2014
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Is there anyway I can change the text on this design?

I've done a few of therein PLA now and my kids really like them. I too had problems with snapping pins. Here's what I've done that works great: First I put a tiny bit of white lithium grease on the hubs and inside the holes of the gears (maybe not needed, but it seems to help). Then I lay the farm flat on my bench and hit it with a hear gun for just 3 or 4 seconds. The gears pop right on. While it is still warm, I use a small philips screw driver or pencil pushed into the center of the hub to make sure the three sections are sufficently spread as it cools.

I was having problems breaking the pins as well. I remixed the design with separate pins and stronger support in the middle of the body.
Check it out: http://www.thingiverse.com/thing:963245

XL Gear Key Chain remixed with stronger pins
by BB1980

I just printed this up & I am painting my gears @ the moment & I will have pics up when they are done, so far I love it.

Hi! How do you put the gears on? I use PLA, 0,1 mm layer height, 0,7 mm shell thickness, 0,8 mm bottom\top thickness. I tried to change shell thickness, but it did not help, tabs were broken. Thanks for your help!

Neat idea. I printed one with and promptly broke a few of the tabs pushing the gears on. I suppose there wasn't enough flex in the ABS. A little super glue fixed the problem. Gears spin freely and this is fun to fiddle with. Thanks for the design!