These are some dampers for nema17 stepper motors. I printed these in soft PLA but other flex filament probably work too. Apply z-scaling if they are too soft or too hard. (I used 20% infill).
Goes well together with my printer coasters: http://www.thingiverse.com/thing:1625387
Update: It has been pointed out to me that a cutout from an old bike tire may work even better, but I don't have any old bike tires. If you do, please give it a try and report your findings :-)
damper.stl | 35.6KB | |
nema17damper.fcstd | 12.4KB | |
ring.stl | 18.2KB |