On Apr 18, 5:03*am, DougC wrote:
I need a chain drive: a ~3 inch cog driving a ~6 inch cog, with 7 or 8
inches in between them. I would only need one set.

I got curious about using the silent Ramsey-style chain but cannot find
anywhere that retails the chains and the cogs.

Ramsey being a brand-name of the drive chain that looks like this-http://www.ramseychain.com/index.asp

I don't need to use Ramsey in particular, I'd just want to buy the same
brand of chain & cogs, since they aren't guaranteed to be perfectly
compatible across manufacturers.

There is lots of different companies that make this stuff, but nobody
seems to retail it at all that I could find in a couple hours of looking
online. I get a few places in the USA that make it, a whole bunch of
places in China and India that make it, and people selling replacement
motorcycle transmission drive chains on eBay.

I have looked for variations of "silent drive chain", "inverted link
chain", "metal belt drive chain" and so on, and got nothing.

Is there anyplace online a regular person can actually buy this stuff?

From looking at the site, I believe the market they are attacking is
the OEM one. They're not doing onesies unless they're engineering
samples. If you're doing that sort of work, give their engineering
folks a call.

How much torque are we talking here? A lot of what would formerly be
done with chains and sprockets has transferred to cogged timing-type
belts. Even Harleys use them, so it's not just for fractional horse-
power. Any reasonably-sized city should have one or more
distributors of same.

A lot of the problems with chains are caused by wear, with wear you
get stretch, with stretch you need some method of taking up slack.
Don't have that to that extent with cogged belts. That's kind of what
those Ramsey chains look like, metal cogged belts.

Just another thought.

Stan