Gear reducing kit recommendation

[JAZZCNC]

Those got very high inductance. 18 mH. Is this issue? They operate on high voltage to compensate i guess and three phases. These do not need power supply, right?

On the other forum I was reading that most important is low inductance, because it enables torque at higher rpm. I am not able to find toque curve for these..

It's all relative to the Voltage, these run on 220Vac so higher inductance isn't an issue. Like I say I've fit dozens of sets and I now stock these motors/drives and fit them to all the larger machines I build. They spin fast and have plenty of torque.

For instance, the vertical 10 x 5 router I recently built uses a single 10Nm motor on the gantry (X-Axis) with a rotating ball nut that lifts the Z-axis which carriers a heavy ATC spindle and all the pneumatics, etc. That motor lifted my friend who weighs 120Kg and the spindle etc clean off the floor at 15mtr/min so I wouldn't be too worried about high inductance or lack of torque.

No, they don't need PSU they run directly from the mains supply.

Previously I was looking at these. 2 mH, 5 Nm
https://www.ebay.com/itm/Free-Ship-4.../274560683235?

But can't find torque curves for either of them.

I wouldn't trust that datasheet, I've never seen any Nema 34 motor with 2Mh inductance, most 3-4Nm Nema 23/4 have an higher inductance than that.