The AI-M-28SB is a robust 28mm × 28mm 2-phase stepper motor with closed-loop control and a 1.8/0.9-degree step angle. It features 16000 PPR resolution, A, B, Z, A/, B/, & Z/ outputs, and a 0.51 Kgf.cm holding torque. Compatible with AiS-D-28SB & AiC-D-28SB drives.