by dustinandrews, published
Gearbugs are toys built from gears. Gearbug #2 a planetary gear system built to be turned by hand. Oddly addicting to sit and turn. Requires a single M3x12 bolt and nut. You can see what it looks like in action here: http://authenticinvention.com/images/gearbug/GearBug2sm.gif
- Cut out all the parts with a laser cutter from 1/8th inch MDF or plywood. The file is in Inkscape format. I cut black first, then blue then red.
- Glue the big ring to the back. Make sure to line it up exactly.
- Using the bolt as a giude, glue the sun gear to the handle. Make sure the radial holes line up.
- wait for the wood glue to dry. You don't want to glue the plaentary gears to anything by mistake.
- Put the bolt up through the bottom.
- Line up the three planet gears around the outside spaced evenly.
- gently lower the handle and sun into the middle.
- put some thread locking compound on a nut and thread it on. It need to be flush with the top of the screw. Not too tight, not too loose.
- wipe off excess locking compound and let the glue dry before turning the handle.