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Unread 28-12-2015, 18:20
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Re: pic: Chain and Wheel in Tube

Quote:
Originally Posted by notmattlythgoe View Post
Cool. Good to know. Do you not lose those advantages with this being exact C2C chain in tube though? I'd imagine you need those tolerances to be high still so going to a dead axle doesn't really help in this case does it?
Quote:
Originally Posted by EricH View Post
The exact center-to-center can actually be easier--the main thing is that your precision work is all on the tube, and it's a smaller hole so it can be easier to get right. I'd be willing to bet that it's possible to place and drill a dead-axle hole by hand--and drill it straight, too, with the right tools!--or drill press by someone who knew what they were doing.

There's also the option of throwing a tensioner block into the system, probably an off-center mounted delrin cylinder, but that kind of defeats the purpose of "ease of maintenance".
As the tube constrains the chain, there is a much greater tolerance for chain slack. You may get backlash, but if the tube fit is tight enough, the chain can't come off the sprocket unless it breaks.
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