This is my new OpenSCAD PLA gear kit. The pin connectors are specially designed to work with PLA - so they are flexible and don't crack when inserted. The idea of this kit is that the gear centre and pins remain the same, its only the outer shells that change. This makes individual gear plates interchangeable, which should simplify the creation of all sorts of gear object mashups. Have fun!

UPDATE Aug, 31 2013 Having problems with loose pins with some PLA colors? I have added some slightly thinker pin plates to solve this problem one has 0.2mm thicker diameter, the other 0.4mm.