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steel chain idlers for cruiser bicycle chain?
For a project I'm working on, I needed a couple of chain idlers
(w/bearings) for a cruiser bike. I don't have the physical room available in this instance to go cheap and just use a couple old rear hubs. I looked a couple days online and couldn't turn up a single source of idlers for 1/2 pitch x 3/16" wide roller chain (with .306" roller dia). I wanted STEEL idlers w/bearings, but nylon or some other synthetic might have worked--but I didn't find any idlers for that size chain, either in steel, acetal, nylon or anything else. ANSI #40 is 5/16" wide rollers, ANSI #41 is 1/4 wide rollers (both are .306 roller dia) and McMaster-Carr has them, so I bought a couple #41's and will hand-grind the edges down a bit until they roll well enough. I'd have thought that type of bicycle chain would have been some standard size, but I didn't see anything industrial using it. Did I just not enter the magic keywords into Google?..... ~ |
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#2
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steel chain idlers for cruiser bicycle chain?
"DougC" wrote in message ... For a project I'm working on, I needed a couple of chain idlers (w/bearings) for a cruiser bike. I don't have the physical room available in this instance to go cheap and just use a couple old rear hubs. I looked a couple days online and couldn't turn up a single source of idlers for 1/2 pitch x 3/16" wide roller chain (with .306" roller dia). I wanted STEEL idlers w/bearings, but nylon or some other synthetic might have worked--but I didn't find any idlers for that size chain, either in steel, acetal, nylon or anything else. ANSI #40 is 5/16" wide rollers, ANSI #41 is 1/4 wide rollers (both are .306 roller dia) and McMaster-Carr has them, so I bought a couple #41's and will hand-grind the edges down a bit until they roll well enough. I'd have thought that type of bicycle chain would have been some standard size, but I didn't see anything industrial using it. Did I just not enter the magic keywords into Google?..... Can't you just use the "jockey" wheels from a derailleur?? http://tinyurl.com/28j6m5 MJP |
#3
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steel chain idlers for cruiser bicycle chain?
MJP wrote:
Can't you just use the "jockey" wheels from a derailleur?? http://tinyurl.com/28j6m5 ....Yea,,, but they're pretty small and built flimsy. They do what they're /intended/ to do just fine, but they don't really carry much of a load doing it. For all the trouble it will be to build a bracket to hold these things where they need to go, I want them to last a LONG time. The smallest industrial idlers in nylon are at least 2.5 inches diameter, 1/4-inch thick and have roller or needle bearings on a bore that's at least 1/2". ~ |
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