More Chain Stuff

[Rorschandt]

[email protected] (Jeff Wills) wrote in news:[email protected]:

> rorschandt <[email protected]> wrote in message
> news:<[email protected]>... <snip>
>> Nine speed chains and pins are narrower than ever, and a slight error in placement results in a
>> greater angle of deflection. Shimano hoopla if you ask me. But that's just my opinion, I could
>> be wrong.
>>
>> rorschandt
>
> IMHO, the special pins are necessary because the original pins are peened over the sideplates on
> assembly. When these pins are pushed out, the sideplate's holes are enlarged slightly. The
> replacement pins are larger in diameter by that same amount. Pushing the original pin back in
> means the hole is now too large for the pin, leaving the area open to failure.
>
> Jeff
>

This sounded legit, and intrigued me, so I made the following measurements(diameter) with my digital
calipers: Original pin =.143" , peened area at its largest =.153" replacement pin =.141", has ridged
area where the plates would reside,the two ridges measure =.145", the "valley" between is =.141"
Hole that has had a pin pushed out =.141"

Although the hole in the chain plate may not be enlarged, the way the replacement pins are formed at
the ends would certainly hold better.

rorschandt