Old Nick wrote in
:

Back to my post hole digger. I want to spring-tension the main drive
chain (5/8"). I was wondering if anyone has any useful ideas about
putting a chain tensioner together. Part of the reason is that I wll
have to use 2, because the chain fouls the mounting (my build :- ) if
I just tension one side.

I have thought of actually using a little sprocket, or a ball bearing
on a shaft (no drive needed, of course). But there was one picture
that appeared to simply use a piece of plastic! Presumably delrin, or
some other slippery, hard material? It looked quite narrow. I assume
it sits only on the chain rollers.

The chain is in exposed, dusty conditions, I might add. That was why
the dragging plastinc idea did not appeal.

Any ideas appreciated.
************************************************** ** sorry

.........no I'm not!
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Does Bill Gates dream of electronic sheep?


whatever you use on the drive side to run against the chain, you really
should think about a ratcheting or hydraulic locking method of keeping
the tensioner tensioned. The idle side has no real pressure on it
(unless it's reversing), the drive side does. A spring taunt enough to
adequately control whip at start/stop may put too much added load on the
chain.


--
Anthony

You can't 'idiot proof' anything....every time you try, they just make
better idiots.

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