Maybe this will help you figure out what it is… The measurements, if correct, indicate a NEMA20, but doesn’t sound like anything I’ve ever heard of… It’s more than likely a NEMA23, a common stepper motor on these… That’s what on my China Blue…
Check out this PDF, remove the txt extension… double check the measurements… It’s in inches not mm.
Data-Sheet-Stepper-Motor-Support.pdf.txt (839.0 KB)
Good luck
