Do you like my designs? I would be happy if you would support me by joining my Printables club! :) (already from 3$) It also gives you access to exclusive models ;) https://www.printables.com/@Preischl3D
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All models I publish are tested by me and my community before I publish them.

Since I kept having problems with my Prusa MK3S motors getting extremely hot, I wanted a stable solution with good thermal conductivity.
Since stick-on heatsinks weren't right for me, I got screw-on heatsinks that I attach directly to the stepper with heat-conducting paste.
To achieve a tight and firm fit, I designed this frame, which you hook into the bottom of the stepper and then tighten with 50mmxM3 screws.
My heatsink is 11mm thick in this case.

It is best to use PETG or ABS/ASA. I used PC. Supports are optional.