The MDrive14Plus Microstepping and MDrive14Plus Half/Full Step motor/drives from Intelligent Motion Systems (Marlborough, CT) use a NEMA size 14 brushless 1.8in. stepping motor and measure just 1.9 × 1.4 × 2.0 in. The microstepping version is capable of full microstepping, while the Half/Full Step version is for applications requiring no more than half and full step.
Features include +12 to +48 Vdc supply input, a choice of internal magnetic or external optical encoders with multiple line counts and index mark, and an operating temperature range of -40 to +85°C. Oversized input capacitors minimize power line surges.
For more info, contact http://info.hotims.com/22908-311