XPost: comp.mobile.android, misc.phone.mobile.iphone
From: xenolith@optusnet.com.au
On 11/5/2022 11:41 am, Vic Smith wrote:
> On Mon, 9 May 2022 16:39:09 +0100, Andy Burnelli wrote:
>
>
>> My point is that nobody who says warp (as in potato chip) measures that
>> warp (as in potato chip),
>>
>> OK. But the fact that rebedding works sometimes means that what it fixed
>> wasn't warp (as in potato chip). What it fixed wasn't runout either.
>>
>>>> Almost nobody could machine a warped rotor (as in potato chip) back to
>>>> perfection simply because the amount of metal needed isn't going to be
>>
>> However, any rotor that was subject to enough heat to truly warp it (as in
>> potato chip) was subject to _tremendous_ heat - almost impossible to attain
>> in a passenger vehicle (again, I'm not talking about the space shuttle
>> here).
>>
>> However, you have to respect my knowledge that _reliable_ sources say
>> otherwise and that runout isn't warp (as in potato chip)
>>
>> I even doubt machining could fix any appreciable warp (as in potato chip),
>>
>> I'm not going to argue with you on that as cast iron has a relatively low
>> melting point where our question is can a rotor typically get to that point
>> on a passenger vehicle whose owner suspects his rotor warped (as in potato
>> chip).
>>
>> The only thing I harp on is I've never met a person who claimed it was
>> "warp" (as in potato chip) who actually measured it, and, worse, the remedy
>> often is something (like rebedding) which couldn't possibly have fixed warp
>> (as in potato chip).
>>
>> Worse than even that, is all the reliable sources say passenger vehicle
>> rotors can't warp (as in potato chip) simply because brakes can't generate
>> enough heat.
>>
>>>> Yes. I know. But did you measure warp (as in potato chip)?
>
>> Note that the link I am giving you has information from the brake rotor
>> manufacturers who themselves claim that their rotors can't warp (as in
>> potato chip) in passenger vehicles under _any_ circumstances.
>>
>> I'm not going to harp on the issue other than to repeat my salient points.
>> a. Rotors don't warp (as in potato chip) in passenger vehicles. Period.
>> b. People who _say_ they did, didn't measure warp (as in potato chip).
>> c. The temperatures needed are unattainable in passenger vehicles.
>>
>>>> I seriously doubt an actual warp (as in potato chip) could be machined,
but
>>>> if it's only slight, then maybe, but what fool would want rotors that were
>>>> actually warped (as in potato chip) even after they were machined?
>>>
>>
>> OK. But I can _easily_ find industry references that say rotors can't warp
>> (as in potato chip) simply because they are designed _not_ to warp (as in
>> potato chip), and, because the temperatures to cause warp (as in potato
>> chip) are unattainable.
>> I respect you. If you can find a _single_ reference on this planet that is
>> reliable that can show brake rotors in passenger vehicles truly warping (as
>> in potato chip), I promise you I will _read_ that reference you find.
>>
>> Just as cellphones don't change the accident rate is a completely
>> unintuitive fact, brake rotors don't warp (as in potato chip) in passenger
>> vehicles.
>
> I agree that rotors don't warp "as in a potato chip."
> Rotors do warp "as in a warped rotor."
Yeah, "as in a potato chip" would be a bit too extreme. OTOH, I have
*measured* warped rotors that were warped sufficiently to have an effect
on the *steering*, even some that were too far gone to machine whilst
still retaining minimum thickness. Note, not seen warping on ventilated
discs that I can recall, just the old solid discs. The ventilated discs
seem rather more robust.
--
Xeno
Nothing astonishes Noddy so much as common sense and plain dealing.
(with apologies to Ralph Waldo Emerson)
--- SoupGate-Win32 v1.05
* Origin: you cannot sedate... all the things you hate (1:229/2)
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