M
Mr Pook
Guest
On Wenndesday, June 05 [email protected] wrote:
>For bicycles the proper modification would be to a tapered shoulder
on
>the pedal spindle instead of a flat one, and of course a matching
>taper in the face of the crank. I have by installing a split conical
>faced washer between the pedal shoulder and the crank in such a way
>that it securely clamps the spindle on the inside as it is tightened
>into the taper faced crank bore. This reduces the probability of
>crank failure at the pedal eye as well as getting rid of left hand
>threads on left pedals.
>This is not something that can be done at home. It takes a lathe and
>milling machine. I chose stainless steel for the washers because it
>is not a high stress application where currently aluminum is the
>contact and I didn't want these to rust.
>
>Jobst Brandt <[email protected]> Palo Alto CA
As Mr. Brandt has pointed out, this is not something that is easy to
do at home.
So my question is: would a soft aluminium sump-plug washer of correct
size also circumvent the problem, acting as a sacrificial face, on
which this fretting damage could occur?
Whether such a 'soft' washer would wear instead of the crank face I
haven't a clue.
Obviously this would not get around the left-handed thread issue, but
is this really a problem at all?
Anyone?
Thanks,
Thomas Hood
>For bicycles the proper modification would be to a tapered shoulder
on
>the pedal spindle instead of a flat one, and of course a matching
>taper in the face of the crank. I have by installing a split conical
>faced washer between the pedal shoulder and the crank in such a way
>that it securely clamps the spindle on the inside as it is tightened
>into the taper faced crank bore. This reduces the probability of
>crank failure at the pedal eye as well as getting rid of left hand
>threads on left pedals.
>This is not something that can be done at home. It takes a lathe and
>milling machine. I chose stainless steel for the washers because it
>is not a high stress application where currently aluminum is the
>contact and I didn't want these to rust.
>
>Jobst Brandt <[email protected]> Palo Alto CA
As Mr. Brandt has pointed out, this is not something that is easy to
do at home.
So my question is: would a soft aluminium sump-plug washer of correct
size also circumvent the problem, acting as a sacrificial face, on
which this fretting damage could occur?
Whether such a 'soft' washer would wear instead of the crank face I
haven't a clue.
Obviously this would not get around the left-handed thread issue, but
is this really a problem at all?
Anyone?
Thanks,
Thomas Hood