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Brake disk material

Brake disk material

Brake disk material

What kind of steel is used for brake disk? I am planning to get them laser cut, out of 9mm steel plates.(Quantity is only 10)

RE: Brake disk material

We use gauge plate, but I don't know what the proper term is. Don't use stainless. Normal brake rotors are grey cast iron, I think, so the basic material properties are pretty hohum.


Greg Locock

RE: Brake disk material

Steel doesn't work as well as graphitic cast iron. It's a issue of thermal conductivity as well as friction properties.

RE: Brake disk material

Thanks, you led my in the right direction. I was actually considering stainless. I found that OEM’s recommend ASTM and ASME specified 80-60-03 Ductile Iron, because of the high-coefficient of friction.

RE: Brake disk material

Old post ... but is there anything new that is better to use? What are discs made of that have a "lifetime warranty"

RE: Brake disk material

These guys suggest "life of the car" rotors are monolithic ceramic material.

These guys offer rotors with a "limited lifetime warranty against warping." http://www.baer.com/Media/ContentDetails.aspx?ContentID=106

Premium priced "Lifetime" pads are pretty common, but even from big suppliers there may be some FINE print.

RE: Brake disk material

My thoughts are too expensive. I can get a carbon brake setup for close the same as the zmi brakes.

RE: Brake disk material

Stainless steel isn't the very best material, perhaps,  but it will work quite well when used with the correct friction material - that's what my Suzuki has,  and I can attest they work well at 150 MPH+ !

Of course, a bike would have stainless rotors simply for appearance' sake.

My Corvette OTOH has simple carbon steel rotors, which also seem to work quite well but require grinding on a flywheel grinder rather than a brake lathe when turning is required,  because of being too hard for the conventional turning tools.

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