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Old 02-08-07, 02:48 AM   #1
DiscoSnorlax
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Strange question involving a freehub...

I'm not sure what the proper forum for this would be, but this seemed the most likely forum to find someone who knows the answer to my question, so here goes...

Let's say I had a hyperglide hub, no rim or spokes on it yet, and a 9-speed 11-32 cassette. (Neither of which I currently have, but that's not the point.)

Let's also say that I wanted to attach it to the center of a square shaft, to drive the shaft, with the ratcheting functionality allowing it to freespin in one direction as normal.


What would be the best, cheapest, and/or easiest ways to do something like this?
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Old 02-08-07, 04:51 AM   #2
caotropheus
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Can you please develop more your idea so we can help you?
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Old 02-08-07, 09:48 AM   #3
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huh?
can you maybe draw up a picture?
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Old 02-08-07, 10:02 AM   #4
DiscoSnorlax
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Ok, lets say I had one of these: (see attached pic)

And I wanted to attach it in the middle of a square shaft, such that when the chain turns, the shaft rotates, but if the shaft is spinning and the chain isn't, it just freewheels.

Basically, instead of driving a wheel, the hub would be driving a square shaft running through the center.

Do you at least kinda see what I'm getting at now?


I suppose maybe some sort of adapter with a square hole in the center that would sit next to the hub and attach where the lacing holes are /might/ work, then a round sleeve over the shaft where the axle normally is? There's probably an easier way, I'd think...
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Old 02-08-07, 10:04 AM   #5
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unbolt the freehub from the hub and bolt it onto your shaft.
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Old 02-08-07, 10:20 AM   #6
DiscoSnorlax
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How did I not manage to think of that...?

(Probably because I don't actually have said hardware in my physical posession yet is my guess... I was attempting to think ahead and I guess I didn't think enough, huh? )
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Old 02-08-07, 10:44 AM   #7
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Connecting the freehub to your shaft looks like the best answer, but do you have the machining capability to match the interface?
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Old 02-08-07, 11:14 AM   #8
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Quote:
Originally Posted by Steev
Connecting the freehub to your shaft looks like the best answer, but do you have the machining capability to match the interface?
That would be the simplest solution. You could also buy a ISO standard disc hub and use the disc bolt interface with an adapter but that's more parts to wear out. I like the idea of an adapter to fasten the free-hub directly to the shaft.
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Old 02-08-07, 12:36 PM   #9
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Even easier, two parts. 1) The left hand side cup from a bottom bracket. 2) n freewheel. single speed bmx or multispeed, whatever your application needs.

Carefully center the bottom bracket cup on the metal shaft and weld it, braze it, bolt it, whatever you're going to do. Then screw on the freewheel. The threads are the same.

Enjoy.
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Old 02-09-07, 03:48 AM   #10
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Now that my curiosity is peaked, what are you building? Sounds interesting.

Tim
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Old 02-09-07, 11:06 AM   #11
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What would work and be relatively easy to do would be to cut the drive side of the hub so that you can use the flange as the connecting plate between the freehub and the shaft.
I second cs1, what are you building?
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Old 02-10-07, 07:28 AM   #12
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I second doing the freewheel route as it would be the easiest. Go to your LBS and ask for a freewheel adapter for J&B importers sun trikes. it is made to fit a round shaft but could either be modified abit to fit on square shaft. would then give you the abitlity to move it on the shaft instead of welding it. You can also still get 8 speed freewheels.
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