Hi, ive done a search but i could not find a clear answer. Ive got a WM18 warco mill that in total weighs about 220kg. Im looking to add steppers so i can use them as a powerfeed initially (maybe to use as a CNC later). Im thinking of using a 2 to 1 belt drive with the existing screws, and i heard someone say you need around 4.5nm of torque.

The only 4.5nm ones ive found at Nema34
https://www.cnc4you.co.uk/Stepper-Mo...4808-02-Nema34

On my router ive used these which are Nema24
https://www.cnc4you.co.uk/Stepper-Mo...H401-03-Nema23


If anyone can give me a idea of the required stepper size that would be great.

Thanks

Trev