Hi I am a bit confused, pretty new to the cnc world.

I have been looking for some replacement stepper motors for my Chinese 6040 router (in the middle of replacing all of the electronics)

I have been looking at steppers in the 3.1nm range but have read elsewhere that this is not the most crucial spec.

The 6040 is not a large router and has a fairly lightweight gantry etc made from aluminium. Would I be better off getting a stepper with a lower nm (say 2.2nm) that matches the amps of the 3.1nm counterpart (4.2A), with a lower inductance 2.5mH as opposed to 3.2mH?

Hope that makes sense.

Thanks for any help.

Mark