pedal cluster roll pin, fixed or not? |
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pedal cluster roll pin, fixed or not? |
mightyohm |
Aug 26 2005, 12:39 AM
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#1
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Advanced Member Group: Benefactors Posts: 2,277 Joined: 16-January 03 From: Seattle, WA Member No.: 162 Region Association: Pacific Northwest |
Does anyone know for certain if the roll pins in the bronze bushing kits are any good or not? I read some time ago that they were having quality problems.
Maybe more helpful would be if someone has a pic of the Porsche roll pin vs. the Weltmeister pin. Any obvious differences? |
ArtechnikA |
Aug 26 2005, 12:03 PM
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#2
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rich herzog Group: Members Posts: 7,390 Joined: 4-April 03 From: Salted Roads, PA Member No.: 513 Region Association: None |
you are having quite a run on obvious questions today, BD - Friday has come just in time... *all of them* are fine until they snap. the good ones are fine longer... this pin is very highly stressed and it gets a LOT of repetitive stress. fatigue will overtake them all, eventually, even if they're somehow able to be kept non-rusty. (corrosion doesn't help fatigue resistance...) the pin is in double-shear (good) but it still takes a lot of stress, which is why the triple-layer spiral is needed. in case of emergency you might use a 6mm bolt but since it cannot flex like a spiral pin, it will eventually transmit all the stress to the clutch actuating rod, which is fairly thin and just mild steel. a strong bolt (like 12,9) will be brittle and a ductile bolt (8,8) might not be strong enough. (bolts are rated for tensile, not shear, strength.) so eventually it'll wear a nice oval in the rod, or break, or both. |
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