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Old 04-15-2003, 03:00 AM   #1
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Default Pulley materials

Is there any difference between diff pulleys made of delrin and graphite?

I believe weight and lasting are approx the same. But what about friction? Is it more about finish, than material?

Reason for asking, is that I already got graphite versions on my Pro2, but I've found some delrin versions, I would like to try.
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Old 04-15-2003, 10:48 AM   #2
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any white delrin for my Pro 3?
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Old 04-15-2003, 10:49 AM   #3
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Do you mean diff outputs? The part that connects to the universals? If so, I've heard that delrin can be brittle, but I've only had graphite ones. They seem to work just fine for me.
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Old 04-15-2003, 11:00 AM   #4
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No... we mean pulley...
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Old 04-15-2003, 01:02 PM   #5
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I called the LHs today, but unfortunately, they were sold out. Wont come back. But I'm curious, so I would appreciate any inputs anyway.
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Old 04-16-2003, 11:49 AM   #6
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Cole,
you might find this interesting
Pinion/Spur Gears
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Old 04-16-2003, 03:05 PM   #7
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pros for graphite
v. lightweight,
doesn't expand thermally that much
self lubricating

cons for graphite
its very brittle, if you get a stone chip in it, it'll become razer sharp
its expensive
difficult to mould

pros for delrin
it ditches heat very quickly
easy to mould,
cheap
very tough so it won't chip as easily

cons,
higher moment of inertia (more rotating mass)


thats about it

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