Asian NEMA 23 425 oz/in (high torque) stepper motor with a 10mm shaft. No problems when driven with Gecko G540 or generic Toshiba TB6600 step control/driver while attached with rigid coupler to a ballscrew shaft or directly to a pinion gear.
This was the first motor I purchased. I was impressed with the shipping package and more impressed when I removed the motor from the box. Very high quality. The testing went very well. Ran right away and very smooth. Yes great torque as advertised and surprisingly makes a good brake shorting all leads together. We are buying more!