Brake Pad/Shoe Material

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Old 05-29-09, 05:40 PM
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Brake Pad/Shoe Material

Want to know what are differences among different brake pad/shoe materials. For example, semi-metallic, ceramic, and organic. Which one is better and why? Basically, I want to know how to choose brake pad and shoe for my cars.
 
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Old 05-30-09, 04:00 AM
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The ceramic pads don't leave a ton of brake dust like the semi-metalic do which means your front wheels won't get dirty as quick

I'm not familiar with organic pads. I'm not a mechanic but I thought all brake shoes were basically the same.
 
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Old 05-30-09, 06:26 AM
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I had a guy in a parts store tell me that ceramic and semi-metallic were the same...not a young kid either..they aren't the same. The little flecks of material embedded in the pad material are one or the other.

And I believe organic has no metal or ceramic flecks at all. Ahhh here ya go....from Consumer Reports......

Semimetallic: This formula, containing about 30 to 65 percent metal, typically includes chopped steel wool or wire, iron powder, copper or graphite mixed with inorganic fillers, and friction modifiers that bond all the ingredients together. These pads are more durable and have excellent heat transfer, but also wear down rotors faster, can be noisy, and may not perform optimally at low temperatures.

Nonasbestos organic: Sometimes listed as organic or NAO, this type of pad is made from fibers, such as glass, rubber, carbon, and Kevlar, with filler materials and high-temperature resins. These pads are softer and create less noise, but they wear faster and create more dust.

Low-metallic NAO: These are made from an organic formula mixed with small amounts (10 to 30 percent) of copper or steel to help with heat transfer and provide better braking. With the added metal, there is more brake dust and they may be slightly noisier.

Ceramic: These are composed of ceramic fibers, nonferrous filler materials, bonding agents, and possibly small amounts of metal. Lighter in color and more expensive than other brake pads, ceramic pads are cleaner and quieter, and offer excellent braking characteristics without wearing down the rotors.
 
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Old 05-30-09, 10:38 AM
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Thanks for all your replied! Very good information.
 
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Old 05-30-09, 08:50 PM
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also as an added note ceramic pads are excelent at dissipating heat. why you think they use it to coat custom headers??
 
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Old 05-31-09, 06:10 AM
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What do you drive????

The engineers at the car companies got paid alot of money to design something that works under "Intended" conditions.

If its a daily driver, or Transport to work car, the oem pads will do just fine. Im not trying to push dealership or factory parts, but there are times when the aftermarket "PLAYS &PREYS" on the general publics lack of knowledge, and gives you a big song and dance on the merits of their "Repackaged" and Renamed " products.

Organic pads are virtually noiseless, but wear charachteristics and dust production are a definite drawback.
Mettalics work well,have good wear life, but can be noisy, and they eat thru your rotors , and generate more heat than organics, and can contribute to Warping or Pulsing Discs..

Ceramics are Glorified metallics, withe the addition of Ceramic fibers....

There is definitely an Overkill point on brake pad Selection. I just have to laugh every time I see a RAV 4, with carbon metallic pads and drilled rotors....
 
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Old 05-31-09, 08:33 AM
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rednecksputter Actually the ceramic coating on things like headers, pistons, etc is to retain heat within the system as well as corrosion protection. Good reading here....
Performance Ceramics LLC., Header and Engine Ceramics, Do It Yourself Ceramic Coatings, Engine and Ceramic Header Serving the Continental United States. Southwest's premier ceramic automotive header coating specialists and turbo coating.
 
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Old 06-03-09, 11:43 AM
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Originally Posted by rednecksputter View Post
also as an added note ceramic pads are excelent at dissipating heat. why you think they use it to coat custom headers??
Actually, they work best at insulating when compared with metal. For both headers and brake pads, thermal transfer is undesireable. You don't want the heat to be transferred to the caliper fluid. For headers, it is desireable to keep underhood temperatures low. Though I suspect they're painted mainly for looks and only ceramic paint can handle the heat.
 
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