Been looking for an hour.
Haven't found anything below 114mm length with 2 different shaft sizes.
It's either change coupling or change handwheel.
All I found so far:
https://www.automationtechnologiesin...haft-with-flat
https://www.automationtechnologiesin...flat-282-oz-in
https://www.omc-stepperonline.com/ne...rice&order=ASC