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Date: 07 Nov 2007 16:48:38
From: (PeteCresswell)
Subject: Truing Brake Rotors?
My front rotor wobbles a few mm - just enough so that it either
squeaks intermittently, or there's too much lever travel -
depending on the pad clearance.

I can see truing a really-taco-d rotor with a hammer and/or some
educated bending... but this is much more subtle.

Is there a technique?

My kneejerk was application of sufficient heat, followed by
sandwiching it between two dead-flat surfaces - probably also
heated quite a bit, but I'd guess there is a loss-of-tempering
issue lurking there.
--
PeteCresswell




 
Date: 08 Nov 2007 21:06:27
From: jim beam
Subject: Re: Truing Brake Rotors?
(PeteCresswell) wrote:
> My front rotor wobbles a few mm - just enough so that it either
> squeaks intermittently, or there's too much lever travel -
> depending on the pad clearance.
>
> I can see truing a really-taco-d rotor with a hammer and/or some
> educated bending... but this is much more subtle.
>
> Is there a technique?

yes. careful bending.


>
> My kneejerk was application of sufficient heat, followed by
> sandwiching it between two dead-flat surfaces - probably also
> heated quite a bit, but I'd guess there is a loss-of-tempering
> issue lurking there.

hard. unnecessary. counter-productive.


 
Date: 08 Nov 2007 01:42:11
From: still me
Subject: Re: Truing Brake Rotors?
On Wed, 07 Nov 2007 16:48:38 -0500, "(PeteCresswell)" <x@y.Invalid >
wrote:

>My kneejerk was application of sufficient heat, followed by
>sandwiching it between two dead-flat surfaces - probably also
>heated quite a bit, but I'd guess there is a loss-of-tempering
>issue lurking there.
>--

really bad idea, and a really big thread diversion opening!





 
Date: 07 Nov 2007 23:46:56
From: landotter
Subject: Re: Truing Brake Rotors?
On Nov 7, 3:48 pm, "(PeteCresswell)" <x...@y.Invalid > wrote:
> My front rotor wobbles a few mm - just enough so that it either
> squeaks intermittently, or there's too much lever travel -
> depending on the pad clearance.
>
> I can see truing a really-taco-d rotor with a hammer and/or some
> educated bending... but this is much more subtle.
>
> Is there a technique?

Use a crescent wrench to bend and the caliper as a truing stand. If
you're a gear head, you can get the "proper" tool:

http://www.amazon.com/Park-Tool-Rotor-Truing-Fork/dp/B000HJDVCS