View Single Post
  #7  
Old August 21st 05, 03:32 PM
John Everett
external usenet poster
 
Posts: n/a
Default 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
Ads
 

Home - Home - Home - Home - Home