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Possible silly question...(8 posts)

Possible silly question...tronracer
Nov 3, 2002 11:11 AM
Are there ball bearings inside a chain? I was taking a link out of a friend's chain and all he had was a cheap emergency chain breaker that we broke trying to get a link out and had to resort to using pliers to pull the pin out. While doing this a tiny ball bearing came from somewhere which ignited an argument about where the ball bearing came from.
There shouldn't bePODIUMBOUNDdotCA
Nov 3, 2002 11:20 AM
Around the pin there is a metal cylinder known as a bushing that has some play between it and the pin. This play reduces the friction on the cassette and chainrings. Its possible to buy bushingless BMX chains.

Where the ball bearing came from I have no idea but its not the chain.

Nick
PodiumBound.ca
ActuallySpoke Wrench
Nov 3, 2002 5:29 PM
The cylinder you are referring to is a "roller." Without a moveable roller, chains, chainrings and cassettes would all wear out much more quickly. A chain bushing is a hollow metal rivet that connects the inner plates. A chain rivet is a solid dowel that connects the outer plates. Most better quality chains today are bushingless. The hollow rivet is replaced by stampings on the inner face of the inner plates that hold the roller and allow it to rotate around them.
Can you solve the mystery?tronracer
Nov 3, 2002 9:23 PM
I have an identical trash link that I opened up to see for myself, there were no bearings. It's a whipperman 1/8" track chain. I was using an emergeny topeak multi tool chain breaker. Its a mystery as to where the ball bearing came from because while attempting to break the chain...a ball bearing fell from somewhere and I heard it hit the hard wood floor and then roll off. What component on a track bike would have a ball bearing mysteriously fall from? There's no brakes , gears, derailleurs, or shifters,I didn't touch anything else on the bike and the bike is no POS. The bike works just fine after we reinstalled the chain even with its missing ball bearing? No strange noises, creaks, etc... WTF?
No bearing on the situationKerry
Nov 3, 2002 2:16 PM
I've never heard of a chain with bearings. Where would/could they go? As to the source of the mystery bearing, I'd suggest aliens or moths, except it's a well know fact that "a moth ain't go no more balls than a frog has hair."
Dammit!, are ye all daft?!Scottland
Nov 3, 2002 11:37 PM
Good God man, a brief moment of lucidity shall undoubtedly present you with the conclusion that the so-called "mysterious ball-bearing" came from none other than the place where one of my damm cycling socks disappears to every third week of washing. Sheesh.
and, the silly answer:Alexx
Nov 4, 2002 5:48 AM
from your story, I surmise that the punch-pin from the chain tool became stuck in the chain, right? Then, you removed the tool, without the punch pin attached, correct? Then you pulled the punch-pin from the chain, and re-inserted it into the tool, am I correct? Well, that little ball bearing was supposed to go under the punch-pin, inside the tool!
AHA, that's probably it then!!!!!!!!!!!!!!!tronracer
Nov 4, 2002 5:58 AM