Correct!
Derek Athey Honiton, Devon UK
On Sat, May 15, 2010 at 11:24 AM, Ken Freeman <kenfreeman096@gmail.com>wrote:
> So this convention means that when either pedal is rising on an upstroke,
> the round end of the cotter pin is visible from above?
>
>
> On Sat, May 15, 2010 at 5:01 AM, Derek Athey <devondirect@googlemail.com>wrote:
>
>> John
>>
>> I don't accept that reasoning. Because the left side isn't under stess due
>> to it being on the 'rise' when the load is on the right side. All complete
>> machines sold in th UK when cotters were current had them with the heads
>> leading. 'If it ain't broke...don't fix it!'
>>
>> Derek Athey
>> Honiton, Devon UK
>>
>> On Sat, May 15, 2010 at 12:55 AM, John Betmanis <johnb@oxford.net> wrote:
>>
>> > On 14/05/2010 5:30 PM, Derek Athey wrote:
>> >
>> > The 'head' of the cotter always 'leads' the stoke, thereby giving the
>> >> strongest point of energy on the down stroke using the strongest point
>> >> of the cotter against the flat of the axle to reduce stress.
>> >> That way one also ensures that the cranks align perfectly.
>> >>
>> >
>> > Derek, that does make sense, although they would be perfectly aligned
>> > either way, provided both sides are the same direction. However, I just
>> did
>> > an image search and still see it both ways. In fact, one image was on
>> > Sheldon Brown's site, where he says this:
>> >
>> > "Some older books speak of installing the cotter so that the pedaling
>> load
>> > is taken by the thick end of the cotter. This is an error, because if
>> you do
>> > the right side that way, the left side will be stressing the thin end,
>> and
>> > vice versa. It really doesn't matter which way you put them in, as long
>> as
>> > they face in opposite directions."
>> >
>> > His reasoning is correct, because it's only the *left* crank that
>> transfers
>> > load to the BB axle, then the axle transfers it to the right crank and
>> > chainwheel, through the *thinner* end of the cotter pin.
>> >
>> > --
>> > John Betmanis
>> > Woodstock, Ontario
>> > Canada
>> > _______________________________________________
>> >
>> _______________________________________________
>>
>
>
>
> --
> Ken Freeman
> Ann Arbor, MI USA