Originally Posted by
jimc101
The nuts look to be sitting on the bearing, not the hub shell, they also interface with the fork, so at no point, should the be in a position to lock-up the wheel. Attach them, and spin the wheel, and this should be the case; hold the the nuts, and the wheel/hub will spin freely.
For them being rigid vs rubber, different manufacture = different design
I think you're looking at picture
#2 , with the outside "shroud-nut" removed.
Look at
#1 and you see the inner face of the shroud is flush with the hub shell.
From the centre: cup/balls/cone/locknut/shroud-nut/fork/QR
The inner locknut is on the cone, that's fine.
Its the space between the nuts that weirds me out.
A soft cover adds an imperceptible drag. This hard one can lock the wheel if tightened.
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Playing with this a bit more, I think there is a part missing: on the inner face of the shroud there is a ledge. (You can see this in picture #1.) A plastic washer could fit there that would give a slippery seal and stop the metal-to-metal contact that would lock the hub.
When I was taking it apart there was some sticky gunk there that I cleaned out, probably the decayed remains of that.
So I either need to find a replacement for this plastic washer (unlikely to find) or look for a more conventional hub I can cannibalise to convert it to a spacer nuts and rubber dustcover.