cracked rotor
Thread Starter
Melting Slicks
Joined: Aug 2000
Posts: 2,112
Likes: 2
From: Sindelfingen Germany
cracked rotor
This is a picture of a cracked Mercedes SL, 5.0l, rotor at 30k miles
Do not know if the wholes are drilled or casted. Just for your information. It seems to be a common affair.
Frederik
Do not know if the wholes are drilled or casted. Just for your information. It seems to be a common affair.
Frederik
Safety Car
Joined: Sep 2001
Posts: 4,411
Likes: 1
From: Wilmington NC
Re: cracked rotor (C5 Frederik)
This is a picture of a cracked Mercedes SL, 5.0l, rotor at 30k miles
Do not know if the wholes are drilled or casted. Just for your information. It seems to be a common affair.
Frederik
Do not know if the wholes are drilled or casted. Just for your information. It seems to be a common affair.
Frederik
Somebody should lock up their drill press and go home!
[Modified by Richin Chicago, 9:08 AM 7/1/2003]
Thread Starter
Melting Slicks
Joined: Aug 2000
Posts: 2,112
Likes: 2
From: Sindelfingen Germany
Re: cracked rotor (Richin Chicago)
They must have had the NC machine on "random" when they drilled it! :) :)
But this is not the reason to show the pic: is there any drilled rotor that has no cracks?
Frederik
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Melting Slicks
Joined: Jul 2000
Posts: 2,483
Likes: 1
From: Wilmington DE
Re: cracked rotor (C5 Frederik)
OK, I give up! Where is the crack??
Those little imperfections at the holes really can't be called cracks. When you get an opening running from the top of the rotor brake surface to the bottom, then you have a crack.
Those little imperfections at the holes really can't be called cracks. When you get an opening running from the top of the rotor brake surface to the bottom, then you have a crack.
Pro
Joined: Jul 2001
Posts: 733
Likes: 0
From: The inmates are running the asylum... San Jose, CA
Re: cracked rotor (C5 Frederik)
Cracked?, not yet... this is what a cracked rotor looks like:
Remember kiddies, proper brake cooling is not a luxury on the track. :D
Reeves
Remember kiddies, proper brake cooling is not a luxury on the track. :D
Reeves
Burning Brakes
Joined: Oct 2001
Posts: 1,116
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From: Alhambra Calismognazifornia, in the country everyone comes just to complain but won't go back home!
Re: cracked rotor (C5 Frederik)
those are definitely stress cracks and will continue to propagate until it looks like the rupture :eek: posted by someone else.
they are almost certainly not cast as there is no radius or even a chamfer at the edges, as someone else already pointed out...that is a no-no :crazy:
some junior mechanical engineer was thinking about his girlfriend when he did the CAD model for those rotors :rofl:
:cheers:
they are almost certainly not cast as there is no radius or even a chamfer at the edges, as someone else already pointed out...that is a no-no :crazy:
some junior mechanical engineer was thinking about his girlfriend when he did the CAD model for those rotors :rofl:
:cheers:
Team Owner
Joined: Oct 2001
Posts: 56,381
Likes: 79
Re: cracked rotor (C5 Frederik)
They must have had the NC machine on "random" when they drilled it! :) :)
Don´t think so. Every second row of bores is the same. One row to the other has an offset.
But this is not the reason to show the pic: is there any drilled rotor that has no cracks?
Frederik
Don´t think so. Every second row of bores is the same. One row to the other has an offset.
But this is not the reason to show the pic: is there any drilled rotor that has no cracks?
Frederik
Safety Car
Joined: Sep 2001
Posts: 4,411
Likes: 1
From: Wilmington NC
Re: cracked rotor (CPT Z06)
They must have had the NC machine on "random" when they drilled it! :) :)
Don´t think so. Every second row of bores is the same. One row to the other has an offset.
But this is not the reason to show the pic: is there any drilled rotor that has no cracks?
Frederik
No there is not, a friend and Pres of PCA over here is an engineer at Porsche and if was up to him there would be no more drilled rotors, just slots if needed.
Don´t think so. Every second row of bores is the same. One row to the other has an offset.
But this is not the reason to show the pic: is there any drilled rotor that has no cracks?
Frederik
No there is not, a friend and Pres of PCA over here is an engineer at Porsche and if was up to him there would be no more drilled rotors, just slots if needed.
