Hi; here is what I use: https://youtu.be/purMxYZiTC8 

I found this motor by coincidence on eBay.de some 15 years ago.
It's a German induction motor with 1300 rpm and a worm gear with
ratio 22:1, so I end up with 59 rpm or almost exactly 1 turn per
second at the crank, which is a customary speed for crank organs.

https://www.hmmueller.de/Pana2022_x1000/photo_2022-03-02_20-46-14.jpg https://www.hmmueller.de/Pana2022_x1000/photo_2022-03-02_20-43-20.jpg 

Of course, I have to switch it off reliably at the end of a roll,
otherwise it pulls the paper off the spool. Up to now I have had
no problems with this. :-)

Regards
Harald Mueller