Looks like the drivers are 52.32" and the driver WB is 1.236". It is from 2014 and I found Japanese web pages to convert it to a new Kato coreless motor, but I skipped right to the gearhead.
The printer is a Elegoo Mars 5 Ultra. Those cylinders are at 0.02mm layers, but like 99% of everything I do is 0.05mm layers.