amir, chuck schmidts campy timeline states that the campy raised pedal cranks were used from 1958-1962.
Not sure why they were eliminated, but it must have been campy felt they were unnecessary. I have always felt the campy crank arm design was modeled after all the steel cottered cranks at the time, FB, Magistroni,etc, and they all has raised pedal sections. they probably felt after seeing them in use, that it was overdesigned in aluminum. These are all conjectures, of course. I don't know if anyone as a definitive answer now days.
I have never seen an raised pedal cranks crack at the pedal section, I do have at least one 1st version crank cracked at the BB taper. Williams of England also had a raised pedal cranks, looks a lot like the 1st version Campy crank, even uses 151bcd.
joel ralph flood philadelphia, pa
On Sun, Jun 1, 2008 at 6:51 AM, Amir Avitzur <walawalaoxenfree@gmail.com> wrote:
> TA cranks pedal threads were recessed to take pedal washers.
> Zeus crankset pedal threads were raised (beefed up), maybe to eliminate
> stress risers in that area
>
> 1. Does anyone know how long, and in what years, Campy incorporated raised
> pedal "lips" in their Record cranksets?
>
> 2. Why were they eliminated?
>
> 3. Has anyone ever seen a Zeus crankset crack along the pedal threads?
>
> Amir Avitzur
> R"G, Israel