Roller gauges
thingiverse
This miniature locomotive was created using Tinkercad. You can edit it online at https://www.tinkercad.com/things/hIFidGhr5ay. It was designed on Tinkercad with precision, as evident in its dimensions: 16.5mm wide for OO gauge and a centre roller that fits snugly into the hole, proving to be a perfect fit when assembled. For O gauge, the design accommodates a wider scale of 32mm.
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