What driver does the OMHT34-490 need?

It is a bipolar two-phase motor, so it needs a bipolar stepper driver rated for the motor's phase current and a supply voltage that meets its rating. Check the datasheet for the exact current and voltage figures before choosing a driver.

How much holding torque does it produce?

1845 oz-in of holding torque. That is enough for heavy CNC axes and automation slides that would stall a smaller NEMA 23 motor.

Is the cable included?

Yes. It ships with a 3 m shielded cable, so you do not need to source and terminate your own lead wires.

Can I use it with a closed-loop controller?

The motor itself has no encoder, so it runs open-loop. For closed-loop operation you would need to add an encoder and a compatible closed-loop driver.

What shaft does it have?

A single shaft, which couples to a lead screw, belt pulley or coupling on one end. Plan the mount so the rear of the motor stays clear.

Is it a drop-in replacement for other NEMA 34 motors?

The NEMA 34 frame and mounting pattern match standard NEMA 34 mounts, but check shaft diameter, length and phase current against your old motor before swapping.