Olde Timey Spur Gear for Printrbot Extruder

thingiverse

This redesigned Drawcut spur gear is for an old-style Printrbot extruder. The big gear features a watchmaker-like skeletonized design, while the small gear boasts increased internal strength with a flat motor shaft spot. To use this model, you may need to enlarge the hole for the hobbed bolt and file down its hexagonal bolt head if printed in "Antique Bronze" by Shapeways; nylon printing might avoid such issues.