re-using chains

Hi,
Anybody ever thought of rotating all the pins in a chain 180 degrees to
get some more life out of a chain ?

Cheers,

Bruce.

news.virgin.net wrote:
Hi,
Anybody ever thought of rotating all the pins in a chain 180 degrees to
get some more life out of a chain ?

Cheers,

Bruce.


How would that differ from removing the chain and turning it round when
replacing it?

"marc" wrote in message
news
news.virgin.net wrote:
Hi,
Anybody ever thought of rotating all the pins in a chain 180 degrees
to
get some more life out of a chain ?

Cheers,

Bruce.


How would that differ from removing the chain and turning it round when
replacing it?


I'm pretty sure the wear occures mostly on the pin on the side that faces
the tension so reversing it would make no difference other than in the way
it came off the top of the chainring then onto the top of the sproket but
I'm not sure - hence the question.

marc wrote:
news.virgin.net wrote:
Hi,
Anybody ever thought of rotating all the pins in a chain 180
degrees to get some more life out of a chain ?

Cheers,

Bruce.


How would that differ from removing the chain and turning it round
when replacing it?

It wouldn't keep Bruce off the streets for so long. I'm not sure that would
be a good thing :-)

Of course neither method will get any more life out of a chain because the
pins wear all the way round, regardless of which way round they are fitted.

~PB

news.virgin.net wrote:
"marc" wrote in message
news
news.virgin.net wrote:
Hi,
Anybody ever thought of rotating all the pins in a chain 180 degrees
to
get some more life out of a chain ?

Cheers,

Bruce.

How would that differ from removing the chain and turning it round when
replacing it?

I'm pretty sure the wear occures mostly on the pin on the side that faces
the tension so reversing it would make no difference other than in the way
it came off the top of the chainring then onto the top of the sproket but
I'm not sure - hence the question.

But the tension is on the " front" face of the pin when the pin is on
the rear cog and on the "rear" face when on the front ring.And how
rotating the pins reduce wear in the pin/plate join?

news.virgin.net wrote:
I'm pretty sure the wear occures mostly on the pin on the side that
faces the tension so reversing it would make no difference other than
in the way it came off the top of the chainring then onto the top of
the sproket but I'm not sure - hence the question.

It wouldn't make any difference even if that is true. Wear to any part of
the pin reduces its diameter. As the diameter reduces, play increases and
the chain elongates. That is chain wear. Chain wear causes sprocket wear.

I thought April Fools Day was on April the 1st anyway.

~PB

news.virgin.net wrote:
Hi,
Anybody ever thought of rotating all the pins in a chain 180 degrees to
get some more life out of a chain ?

Cheers,

I don't think that doing something like this would significantly
increase the life of a chain. Once it gets to the point where it might
be useful, other parts of the chain would also be wearing away. Parts of
mechanical things wear together, so the chain could wear faster once you
do this.

Secondly you would in effect be taking the chain completely apart, and
putting it back together. This could increase the chances of future
chain failure, and I doubt you would put it back together as even as a
new chain, also increasing wear.

In article , marc
says...
news.virgin.net wrote:
Hi,
Anybody ever thought of rotating all the pins in a chain 180 degrees to
get some more life out of a chain ?

Cheers,

Bruce.


How would that differ from removing the chain and turning it round when
replacing it?


It wouldn't change the pin's orientation within the link.

In article , Pete Biggs
says...
news.virgin.net wrote:
I'm pretty sure the wear occures mostly on the pin on the side that
faces the tension so reversing it would make no difference other than
in the way it came off the top of the chainring then onto the top of
the sproket but I'm not sure - hence the question.

It wouldn't make any difference even if that is true. Wear to any part of
the pin reduces its diameter. As the diameter reduces, play increases and
the chain elongates. That is chain wear. Chain wear causes sprocket wear.

Wear occurs where the inner link rubs against the pin - turn the pin
around and there's another side for it to wear down. It wouldn't make
any difference to wear on the inner link though, so you don't get two
chains for the price of one. :-)

"Rob Morley" wrote in message
t...
In article , Pete Biggs
says...
news.virgin.net wrote:
I'm pretty sure the wear occures mostly on the pin on the side that
faces the tension so reversing it would make no difference other than
in the way it came off the top of the chainring then onto the top of
the sproket but I'm not sure - hence the question.

It wouldn't make any difference even if that is true. Wear to any part
of
the pin reduces its diameter. As the diameter reduces, play increases
and
the chain elongates. That is chain wear. Chain wear causes sprocket
wear.

Wear occurs where the inner link rubs against the pin - turn the pin
around and there's another side for it to wear down. It wouldn't make
any difference to wear on the inner link though, so you don't get two
chains for the price of one. :-)

That's how I figured it - since were on the subject though, I don't really
understand the business of measuring the chain periodically to see if it
needs replacing in order to avoid chainging the cassette. How many chains do
you get to a cassette if you do this and is it economically sensible ?