splined?

Firstly, it amazes me that you comment about the strength of
hub/cranksets and frames when you don't know the difference between
splined and square taper.

But back on topic, a splined hub has an axle that has a bunch of little
"ribs" going down the ends of it. The crank has them on the inside of
its self, and they interlock with the hub ribs to transmit the forces of
riding. The alternative methods are to have a tapered square on the end
of the axle, which the crank is pressed onto (cotterless or square
taper). The worst way to do things is to have a flat spot machined onto
the axle and press a tapered pin into the crank to take up the forces of
riding (cottered). The splined design exposes the most surface area as
possible to the crank, and thus is generally the strongest. It is also
halpful that the general profile of a splined axle is circular, so it
has fewer places to allow cracks, while square taper leaves 4 convienent
little corners to drive cracks into the crank.

Even with splines a crank can be weak, though. Splined cranks are nice
because they are generally of a tubular steel construction, which so far
has proven to be stronger than many aluminum cranks and cheap solid
steel cranks Good quality aluminum splined cranks do exist, though, and
they are plenty strong.

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gerblefranklin - Trials Unicyclist

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"Peace cannot be kept by force. It can only be achieved by
understanding."-Albert Einstein
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thanks 🙂

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drewation - stoons finest

why take the bus when you can uni
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gerblefranklin said:

*Firstly, it amazes me that you comment about the strength of
hub/cranksets and frames when you don't know the difference between
splined and square taper.
*

Hey, I did the same thing, but NOW I KNOW!! -Finally-, I get it.

--
James_Potter - betcha can't stick it!
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