Derivative of: http://www.thingiverse.com/thing:45103

This is a compact derivative of the "Linear actuator concept for CNC machines" intended for stand-alone applications using a uStepper. Could be used as window or door opener for example. May be updated at a later point.

Hardware: 2 x 625ZZ bearings 2 x M3x35mm 4 x M3x8mm (or M3x10mm if using washers) 1 x M3x10mm (for the motor gear) 3 x M3 nuts 2 x M5 nuts 1 x M5 threaded rod 2 x M5 washers (if needed between bearings and gear)

A short video can be found here: https://youtu.be/LF4IwXSxZNg