splined hubs?

DrumCorpsFan said:

i know theyre stronger, but what makes them so strong. whats the
difference other than a different shape to slide the cranks onto

different materials, different designs, more materials, etc...

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The splines create a larger surface for the hub and cranks to touch.
Same force, more area, equals less pressure. The axle of a splined hub
is stronger because of they are made from stonger materials. This is
because there is no reason of having a good quality and strong bond
between the axle and the cranks if the axle is weak.

Sam

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standard hubs (which are square-tapered) :
imagine the axle having a [ ] shape, and the crank having the same [ ]
shape to fit over it, and then the crank is held in place over the axle
with a 14mm bolt.

the splined hubs:
imagine the axle having almost a *** shape, and the crank having the
same *** shape to fit over it. there is a lot more surface area, more
area to spread the load, on a *** than on a [ ].

unicycles require stronger hubs and rims than a bike normally does,
because instead of spreading the weight between two wheels, it is all
forced down on one.

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I thought it had a little more to do with having a larger diameter axle.
If you put splines on it then you can take advantage of almost the
entire width of the axle, and thus have a larger diameter chunk of
metal (which is harder to break).

The splines also, as you said, increase the contact surface between the
crank and hub. But I would guess that that is more to prevent the
interface from wearing out as quickly.

That's What I -think-, anyway. Someone else will come along shortly
and correct me.

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i understand, its all making sense now, thanks

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