Hi,

I would like to build a CNC router and found two 425 oz-in stepper motors with similiar specs. They are both from China's Longs Motor company and these are differences:

23HS9430, rated voltage 4.8 V, rated current 3.0 A, inductance 6.8 mH, resistance 1.6 Ω
23HS9442, rated voltage 3.78 V, rated current 4.2 A, inductance 3.8 mH, resistance 0.9 Ω

I think it does not matter that much which one to use for router. Low IPM should not be an issue.


My idea is to reuse these stepper motors for laser engraver as well and in this situation high IPM is needed.

Can you confirm that the lower inductance motor will be more suitable in respect of getting higher RPM? Low torque is OK in this application. And of course, this application would use timing belt to get higher IPM.

425 oz-in steppers are probably overkill for moving lightweight laser head, but I dont want to buy other smaller ones if not absolutely neccessary.

Which one of these two steppers would you use? Please comment. Thanks.