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Coefficient Of Friction: How It Works and How Manufacturers Use This Knowledge To Create Better Brak

When you’re gauging a brake pad, it’s important to keep its coefficient of friction in mind. What coefficient of friction? It’s the ratio of friction force between two façades and the force that’s pushing them together.

The smaller the friction coefficient, the smaller the force needed for the surfaces to slip. The higher the friction coefficient, the stronger the force needed for the two to slip. When an object weighing 100 kilograms needs to be moved with 100 kilograms of force, the friction coefficient is one (1). However, if that same object is moved with 50kg of fore, then .5 is the friction coefficient.

Now, when determining a vehicle’s brakes friction coefficient, both the braking torque and the fluid pressure required for the brake pad are used to make that determination.


For the most part, OEM brake pads are equipped with a .3 or .4 friction coefficient while performance brake pads are equipped with a .4 or .5 friction coefficient. If there is a higher coefficient, there’s no need for lots of fluid pressure to produce a high braking force. If the friction coefficient is extremely high, there’s an overabundance of friction and it makes it harder to brake.

3 Significant Factors For The Coefficient Of Friction – for good Brakes?

1 – The first, and most important, factor in the friction coefficient is to ensure brake pads obtain maximum friction level right when the brake pedal has been engaged. When the initial braking power is not good, people often say their brake pads are not working right.

2 – A second important factor for friction coefficient is the stability in varying temperatures. Lower coefficient of friction is normal in low and very high temperatures. However, this is an issue because the vehicle won’t have enough braking power if the temperature is extremely low. Another issue is the reduction in friction coefficient at very high temperatures.

3 – The final important factor for friction coefficient is the stability at various speeds. When a stable friction coefficient is attained during braking at a speed of 60 kilometers an hour, brake pads become dangerous. However, they become unstable when braking at a speed of 180 km/h.


We input large amounts of money for Research and development annually to enable us always with leading technologies.We cooperate with Qinghua university to research and develop new material,more than 100 formulars Researched and developed by ourselves.We were awarded patent with Enhanced brake lining in 2008.We can make products according to ur samples and ur requirements.