MudLark Posted April 3, 2022 Share The conventional view is that a chain wears primarily as between the roller and the pin. But I wonder if this is correct? Disassembling several different makes of chains, I have noticed that the roller doesn't seem to actually rest on the pin itself or to make direct contact with it. Rather, the roller seems to rest on shoulders pressed into the inner plate metal. That seems to be the only contact point. If I am correct then that would also be logical in a bicycle as the smaller contact surface would likely serve to reduce friction (albeit at the cost of greater load on the bearing surfaces). But if I am correct, then it also raises some questions about where the wear in fact occurs* and what one should be aiming to achieve with lubrication (not that one might actually do anything differently). *Let's accept that chains wear in several different ways, including between plates and between inner plates and pins. Here I'm focused on what happens with the interface between the rollers and the various other components. Link to comment Share on other sites More sharing options...
Eldron Posted April 3, 2022 Share https://bike.bikegremlin.com/3306/bicycle-chain-wear-elongation/ Dicky DQ and Marcv 2 Link to comment Share on other sites More sharing options...
SwissVan Posted April 3, 2022 Share Time for a JB masterclass, he covered this topic pretty well in the past, should have been pinned in the tech forum…. Maybe it was 🤨 porqui, Wannabe and mazambaan 2 1 Link to comment Share on other sites More sharing options...
Alouette3 Posted April 3, 2022 Share Pop off an old, well used master link and you can often see the wear in the pins Link to comment Share on other sites More sharing options...
David Marshall Posted April 3, 2022 Share JB published a book on the subject. https://www.amazon.com/Everything-need-about-Bicycle-Chains-ebook/dp/B00O46YUW0 Tech Q&A used to be a great Friday thread. Miss him. (That and couches in the classifieds.) porqui, Wannabe, SwissVan and 2 others 5 Link to comment Share on other sites More sharing options...
MudLark Posted April 3, 2022 Share 3 hours ago, Alouette3 said: Pop off an old, well used master link and you can often see the wear in the pins So there's a case in point. When you pop out the master link, the rollers don't fall out. Why? Because they don't rest on the pin but on the shoulders I have referred to. Link to comment Share on other sites More sharing options...
Robbie Stewart Posted April 3, 2022 Share Boet, you need to sort your sleep patterns out. How on earth does one come up with these ideas at 4 in the morning 🤔 peetwindhoek, ChrisF and MudLark 1 2 Link to comment Share on other sites More sharing options...
Knersboy Posted April 3, 2022 Share My chain only wears when it is on my bike ChrisF, MudLark and TheoG 3 Link to comment Share on other sites More sharing options...
dasilvarsa Posted April 4, 2022 Share Inner plates have grooves for holding the Rollers in place. Pins Hold the Chain Together. (The Pin Never Touches the Roller). Wear is between Rollers and Inner Plates. If you Lube your Chain "Every Ride" or Every 30Km . Your Chain will Last Very Long. Edited April 4, 2022 by dasilvarsa Link to comment Share on other sites More sharing options...
jcza Posted April 5, 2022 Share I thought it stretches? NotSoBigBen and Eldron 2 Link to comment Share on other sites More sharing options...
Eldron Posted April 5, 2022 Share 58 minutes ago, jcza said: I thought it stretches? Sat that is a mighty big spoon to be stirring *** 🙂 Link to comment Share on other sites More sharing options...
jcza Posted April 5, 2022 Share 14 minutes ago, Eldron said: Sat that is a mighty big spoon to be stirring *** 🙂 Can you remember the arguments? 🤪 Link to comment Share on other sites More sharing options...
Eldron Posted April 5, 2022 Share 1 minute ago, jcza said: Can you remember the arguments? 🤪 Vaguely.... I think the metallurgist in me died many times during those "heated debates". jcza 1 Link to comment Share on other sites More sharing options...
throttles Posted April 5, 2022 Share 2 hours ago, TheoG said: I’m surprised nobody asked in 2hours.. but here I go.. Where is picture 7?? ChrisF 1 Link to comment Share on other sites More sharing options...
TheoG Posted April 5, 2022 Share Just now, throttles said: I’m surprised nobody asked in 2hours.. but here I go.. Where is picture 7?? In here as posted by @Eldron: https://bike.bikegremlin.com/3306/bicycle-chain-wear-elongation/ throttles 1 Link to comment Share on other sites More sharing options...
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