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#1
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Shimano chains - rivet reuse?
The other day the mechanic at my local bike shop rejoined my Shimano 10
speed Ultegra chain reusing two rivets. Looking at the link under a jeweler's magnifying glass I can clearly see that the peening on the rivets is missing and I can see the countersinking in the plates around the rivets. The mechanic is very experienced, very well respected and services many bikes in a busy shop. It looks like the rivets have been inserted to the correct depth. Nevertheless the contact area between rivets and plate is substantially less than it should be and the peeening that would prevent the rivet moving is absent. I am interested in readers' opinions and experience regarding the safety and durability of this repair job. Do many people reuse rivets? Any experiences of reused rivets working well? or failing? Many thanks Martin -- Removed z before replying by email. |
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#2
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Shimano chains - rivet reuse?
Martin wrote:
The other day the mechanic at my local bike shop rejoined my Shimano 10 speed Ultegra chain reusing two rivets. Looking at the link under a jeweler's magnifying glass I can clearly see that the peening on the rivets is missing and I can see the countersinking in the plates around the rivets. The mechanic is very experienced, very well respected and services many bikes in a busy shop. It looks like the rivets have been inserted to the correct depth. Nevertheless the contact area between rivets and plate is substantially less than it should be and the peeening that would prevent the rivet moving is absent. I am interested in readers' opinions and experience regarding the safety and durability of this repair job. Do many people reuse rivets? Any experiences of reused rivets working well? or failing? Many thanks Martin I would never ride with a chain rejoined with reused rivets. Even with 8 speed Shimano chains they say to rejoin them with a special pin. 10 speed chains have even thinner outer plates. Lou -- Posted by news://news.nb.nu |
#3
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Shimano chains - rivet reuse?
Martin:
It used to be that you could use the existing rivet to close a chain. In fact, it would be very difficult to replace a rivet since you could not thread it through the whole. so, you would break the chain without completely removing the rivet. That is how chains would work, until shimano came up with the replaceable rivet. It was the stupidest idea ever. Whenever you break a shimano chain, you must replace the rivet with a special order shimano rivet. Otherwise, the chain will surely fail. With SRAM chains, you can reuse existing rivets, or use the special link that allows you to break the chain with no tools. Andres |
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Shimano chains - rivet reuse?
Sun, 21 Aug 2005 08:46:29 GMT, Martin skrev:
.. I am interested in readers' opinions and experience regarding the safety and durability of this repair job. Do many people reuse rivets? Any experiences of reused rivets working well? or failing? Last time I reused a rivet on a Shimano chain, 3 years ago I broke the chain in a short steep hill sprint, and I didn't discover what happened till I found myself lying on the ground with scratched elbow and knee and - worse - a scratched bike and a bent rear drop. I haven't dared to experiment with reused pivets since. Extra rivets from Shimano are ufairly expensive I think - so I use SRAM assembly links, which are reusable - but should be changed with every new chain, according to www.SRAM.com. It works fine with Shimano chains also. Ivar |
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Shimano chains - rivet reuse?
On Sun, 21 Aug 2005 08:46:29 GMT, Martin wrote:
The other day the mechanic at my local bike shop rejoined my Shimano 10 speed Ultegra chain reusing two rivets. Looking at the link under a jeweler's magnifying glass I can clearly see that the peening on the rivets is missing and I can see the countersinking in the plates around the rivets. I guess I'm slow - why would he need to use two rivets to rejoin a chain? If he opened the chain for service, that's one rivet - OTOH if he's repairing a broken chain that's also one rivet. Ron The mechanic is very experienced, very well respected and services many bikes in a busy shop. It looks like the rivets have been inserted to the correct depth. Nevertheless the contact area between rivets and plate is substantially less than it should be and the peeening that would prevent the rivet moving is absent. I am interested in readers' opinions and experience regarding the safety and durability of this repair job. Do many people reuse rivets? Any experiences of reused rivets working well? or failing? Many thanks Martin |
#6
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Shimano chains - rivet reuse?
Martin wrote: The other day the mechanic at my local bike shop rejoined my Shimano 10 speed Ultegra chain reusing two rivets. Looking at the link under a jeweler's magnifying glass I can clearly see that the peening on the rivets is missing and I can see the countersinking in the plates around the rivets. The mechanic is very experienced, very well respected and services many bikes in a busy shop. BUT he made a serious mistake. BAD idea for any shimano chain, REALLY bad idea for the 10s chain. He is asking for a broken chain, on a chain that is known for breaking even when connected properly. It looks like the rivets have been inserted to the correct depth. Nevertheless the contact area between rivets and plate is substantially less than it should be and the peeening that would prevent the rivet moving is absent. I am interested in readers' opinions and experience regarding the safety and durability of this repair job. Do many people reuse rivets? Any experiences of reused rivets working well? or failing? Many thanks Martin |
#7
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Shimano chains - rivet reuse?
On Sun, 21 Aug 2005 08:46:29 GMT, Martin
wrote: The other day the mechanic at my local bike shop rejoined my Shimano 10 speed Ultegra chain reusing two rivets. Looking at the link under a jeweler's magnifying glass I can clearly see that the peening on the rivets is missing and I can see the countersinking in the plates around the rivets. The mechanic is very experienced, very well respected and services many bikes in a busy shop. It looks like the rivets have been inserted to the correct depth. Nevertheless the contact area between rivets and plate is substantially less than it should be and the peeening that would prevent the rivet moving is absent. I am interested in readers' opinions and experience regarding the safety and durability of this repair job. Do many people reuse rivets? Any experiences of reused rivets working well? or failing? When Shimano first introduced the "black pin" idea back in the early '90s, I thought, "bull****"; and continued to push the old pins back in. Since I hot wax, I was breaking and reconnecting chains every 400 - 500 miles. After 18,138.6 miles of such treatment (I googled up that figure from a 1997 posting) one of the pins pulled out. After that I started using Craig Super Links (now manufactured by Forster) and have stopped worrying about link separation. jeverett3ATearthlinkDOTnet http://home.earthlink.net/~jeverett3 |
#8
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Speaking of Shimano chains amd pins...
I bought an HG-73 9-speed chain from Nashbar. It came with a regular pin
installed on one side of the last link (not a special pin with the guide). Are you supposed to use this pin after shortening the chain to the correct size? I removed that part of the chain and used a special pin join the ends. I would have thought they would include a special pin and not include a partially attached "normal" pin. Art Harris |
#9
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Shimano chains - rivet reuse?
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#10
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Speaking of Shimano chains amd pins...
"Arthur Harris" wrote in message
... I bought an HG-73 9-speed chain from Nashbar. It came with a regular pin installed on one side of the last link (not a special pin with the guide). Are you supposed to use this pin after shortening the chain to the correct size? I removed that part of the chain and used a special pin join the ends. I would have thought they would include a special pin and not include a partially attached "normal" pin. Art Harris http://cycle.shimano-eu.com/media/cy...9830558543.pdf -- DTW .../\.../\.../\... I've spent most of my money on mountain biking and windsurfing. The rest, I've just wasted. |
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