Mega Block train wheel
thingiverse
This is a replacement wheel set for a mega block thomas train that my kid lost. The two halves screw together after working them back and forth a few times. Or you can heat the female end slightly to soften it a bit and they'll go all the way in. Going to update the design a bit for a closer to stock fit. https://www.tinkercad.com/things/3UGf1XarciE
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