Ustepper motor controller was originally designed for NEMA17 Stepper motors, however this mounting kit makes it possible to mount the uStepper on to the back of a NEMA23 Stepper motor. The uStepper is capable of delivering 2.0A at 30V (24V Recommended) which is enough for many NEMA23 Stepper Motors.
For this mount to work with your NEMA23 Stepper motor, it should have 4 holes spaced centre to centre 32mm on one side and 51mm on the other. They should be M3 with a depth of 1.8mm. The centre hole should be 10mm in diameter, and the shaft should be aligned with the bearing to give a depth of roughly 4mm.