Has anyone ever repaired a noisy gearbox.
View attachment 1887324
View attachment 1887325
Mass production unit, crimped edge, pressure fit sleeve around the shaft.
If I have not already been enough help... (help!) B.B.Q. grill motors for rotisseries work good for painting arrows. But they are noisy. l.o.l..
If all it does is drive the whilygig , enough torque and speed control and a small variety of motors could in theory work when driven shaft is fitted to it..
Gears change speed, and torque, even direction depending on design and application.
Why your gearbox is noisy needs known before any consideration of if shims would help.
Does not appear to be easily serviceable though.
As I like to say sometimes when working on stuff today (and I used to be in a couple maintenance departments , so I'm not real helpless on some items)
Somewhere there is a Chinaman laughing at me.
(Or an engineer , ect... Though engineers often get wished a kick in the$@# on difficult or hard to access work , though in fairness they have parameters to design within, often cost and production based. )