Turn-table based wheel hub




Modern LEGO wheel hubs are known to suffer from a lot of slack. Other drawbacks are that you can only use them with CV-joints - not with the stronger and more angleable U-joints - and the section inbetween the pin holes of the hub is wider than 1 stud.

While playing with one of them I noticed that part of the slack is because the DBG pins don't sit very tight in the wheel's pin holes. It helps a little if you have an axle running through the wheel which extends into the DBG-part of the hub, but not much. So I looked into using a turntable as wheel hub for the 15038 wheel (with 6 pinholes) without modifying it and it gives quite a good result. Better than the LEGO wheel hub:

The turn table is attached to the wheel with 2 3L pins. The assembly inside the wheel makes sure the turn table's pinholes are attached to a pin and not to an axle (which would give slack) and sits tight against the inside of the wheel to give stability. Finally an extra belt wheel is attached to the wheel to give even more stability to the 2 3L pins that connect the assembly to the wheel.

You can do more or less the same for the 56908 wheels. With crossblocks. The only drawback compared to the bigger version is that there are two 3L axle running through the turn-table pin-holes, which introduces a little slack, but still much less than the LEGO wheel hubs:

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Name Turn-table based wheel hub
Designer Didumos
Designed 2017
Parts 38
Theme Technic
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