These steppers have a threaded shaft, which allows them to be used as a linear actuator. As the motor runs, it moves along the shaft at a specific rate of 1cm per 5 full rotations. These are a good choice for linear motion where precision and repeatability are important.
**Note:** It looks like the datasheet for this stepper may not be accurate. When connecting this motor to a bi-polar driver you’ll want to wire it according to the wiring diagram in the documents below.
* Step Distance: 0.01mm
* Rated Voltage: 12V
* Rated Current: 0.4A/Phase
* 100mm Long Threaded Shaft (keyed on one end)
* Holding Torque: 21 N.cm
* 6-Pin Wiring Harness Included
* NEMA 15
* [Wiring Diagram](http://cdn.sparkfun.com/datasheets/Robotics/stepperdiag.JPG)