Hubs for filament spool, makerbot 52,5mm + 38mm china spool

Made these spool hubs for mounting on a 12mm rod / axle

The Makerbot hub is 52,5mm
and the other is 38mm

I have pre scaled them to be printed in ABS
I printed at 15% infill 2 shells 0.20 or 0.30 mm

And yes it is a very snugg fit

If you want to print in pla maybe you need to scale them down.

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Have now made a v2 with conical shape
(hub_makerbot_scaled_v2.STL)
(hub_china_scaled_v2.STL)

Cone angle is 2,86 degrees
Also added more ribs (8) fore more contact surface
This hub fits like a glove :D