I've noticed on sites like rockauto there are rotors for sale that are described as quiet.
Supposedly there is a type of iron (called "Gray" iron) that has a
different microstructure that is less prone to high-frequency
brake-squeel noise, but this type of iron is supposedly what most or all rotors are already made with.
So is this true?
That you can count on your standard white-box, no-name brand of rotors
that might cost you $20 - $30 a rotor is already made using the most appropriate type of iron, this so-called "Gray" iron, and that anything labelled as "low-noise" rotors are just throwing that term in to extract
a few more bucks from the price?
I've noticed on sites like rockauto there are rotors for sale
that are described as quiet.
Hadn't heard of these -- can you point to a specific part?
Wikipedia says gray cast iron is the most common cast iron.
Joe Pfeiffer wrote:more)
I've noticed on sites like rockauto there are rotors for sale
that are described as quiet.
Hadn't heard of these -- can you point to a specific part?
Wikipedia says gray cast iron is the most common cast iron.
Put this into a google search:
"Noise Dampening Iron" rotors
You'll find an assortment of online vendors describing rotors with the
term "Noise Dampening Iron".
If there really was a different class of iron that had unique
noise-dampening properties that cost a little more (or maybe a lot
than "regular" rotors, I'd love to know about that.full
Yes, there are several different types of brake pads, but there really doesn't seem to be different metalurgy when it comes to the rotors. I
think this "Noise Dampening Iron" is a marketing gimic.
There might be stainless-steel rotors (which presumably won't rust) but
the thermal properties of stainless steel are not optimal compared to
cast iron (based on what I've read).
I believe the squeel that I'm getting is happening at the contact point
where the pad backing plate rests and slides against the bracket or arm
that is part of the wheel hub or knuckle. This arm/bracket is what
keeps the pads from being rotated when they grab the rotor. So the
braking force is applied to this contact point, and over time as thebecause
pads wear and get thinner, the backing plate moves laterally to a
different contact point on the bracket, and over time you'll get a
groove forming on that bracket. When you apply the brakes while in
reverse and then again when in drive, you'll hear the pads clunk
of the play caused by the groove in the bracket.designed
This is why there are pads sold with small shims that make up for the
bracket wear. But I think even with shims if there is a brake squeel
that won't go away, it's happening because of something going on at the contact point of the bracket. If there is some special product
for that application, I'd like to know. Brake lube doesn't help.
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