Hedgehog or Hamster Bearing Training Wheel
thingiverse
This is a Hedgehog wheel I designed and built for my daughter. You will need the following to complete it: 1 x 150mm long 6mm threaded bar. 2 x 626 Z bearings. (They are 18.8mm outer diameter, 6mm inside About 6mm thick as well) 7 x 6mm Nuts 2 x 6mm washers To assemble the spacer fits in between the two bearings and can be fastened with the nuts. You will add a washer between the wheel and stand as well. I used two nuts to lock the nuts on either side of the shaft/threaded bar.
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