forgive the newb question.. but what is a good power supply to use with this?

You can view videos of this motor in action as well as the easy driver and even an adapter for the shaft of this motor here.
Videos
Shaft adapter
You can view videos of this motor in action as well as the easy driver and even an adapter for the shaft of this motor here.
Videos
http://www.youtube.com/watch?v=sRIBZFlxGIw
http://www.youtube.com/watch?v=3SzWp0vVAzI
Shaft adapter
http://www.youtube.com/watch?v=UtKU1pipy7s
My youtube page
http://www.youtube.com/user/Halo2maniaccc

What have you guys used to attach the motor shaft to gears or threaded rods, etc? The one I got has a perfect rod for the motor shaft, and I'm worried a gear with a set screw would be overcome by the motor's torque...
Any thoughts?
Thanks,
Ben

Could someone clarify the shaft length note in the description? Is it 62.5 instead of the 33.8 on the datasheet, or is that a measurement from somewhere else?

You can try Trossen Robotics. They show this motor in stock and at the same price. They also seem to sell a lot of Sparkfun-made products too.

Though it will step at 12V, I have experimented with the motor and found it will not step accurately at anything under 12.6V. It advertises a +-5% error, though mine came with no error, so it took 1600 steps, at 1/8 microstepping, to do a full rotation. Mine would not do a full 1600 steps at under 12.6V.

I'd also like to be able to get a hold of a few of these myself. Thank you.

2nding this, please get some more of these in stock!

Hey all,
Just wondering when you will get more of these in, as these look like great little motors for the CNC I'm making.
If you won't be getting them in any time soon, could you recommend another supplier for this stepper motor as it has the perfect amount of hold strength.
Thanks.

SolidWorks model available here:
http://adam.theoherns.com/wp-content/uploads/2009/02/rob-08420_steppermotor.zip

Sketchup model.
http://sketchup.google.com/3dwarehouse/details?mid=d0dfff3a7c39ba603e0d0b5a1e930776

Question - I'm evaluating this motor and the datasheet says it is rated for about 15.4 VDC. I applied 12 VDC and stepped it through its phases - everything looked good.
I noticed that after leaving it powered for about 10 minutes, it was too hot to touch. Does this require a current limiter or voltage de-rating, or does it naturally run hot?

Roughly speaking, you pass high(er) voltage through one coil to energize it, then pass power through the other coil and the rotor will advance one step. The extra 2 wires do not connect. The Arduino does not have enough power from its GPIO pins to do this directly. That's why stepper motor controller were invented - to handle the bigger power requirements.

Pardon my noob question... but I bought this to use it with an Arduino Diecimila and I'm able to run it by connecting it's 4 control pins to 4 digital outs on the Arduino. However, that leaves 2 pins remaining which I assumed I could attach to a 9V power adapter for greater torque... however attaching power doesn't do anything. Am I missing something huge? How do I connect power to this? The datasheet doesn't label those 2 other pins as + or -.