Dixcelbrake
Advanced Member
- Messages
- 475
Its seem most of the people don't understand how the brake system work and usually they go for the aftermarket disk and pad because their 'Mate' said they are billlion but they never really understand what the technology behind the making of brake products.
So I am going to give out a some information about braking system, so you can completely understand what and why are you buying -
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What is Friction Co-efficiency?
One of the important elements in the evaluation of brake pads is “friction co-efficiencyâ€Â. Friction co-efficiency represents the degree of friction between two objects, note the smaller the figure is, the smaller the friction between the objects are, i.e. the objects are easier to slip, while the larger the figure is, the bigger the friction is, i.e. more difficult to slip. Simply friction co-efficiency can be explained like this, to move an object of 100kg horizontally, it takes a force of 100kg, while if the object is moved by a force of 50kg, the friction coefficient between the object and the road surface is 0.5. In the case of brakes for vehicles, friction coefficient is calculated using braking torque generated during braking (G deceleration) and fluid pressure (pedal pressure) required for generating the torque, the formula for the calculation is as follows,
Normally, normal pad friction coefficient is around 0.3~0.4 and that of sports pads is 0.4~0.5. If the friction coefficient is high, that means light fluid pressure (i.e. light pedal pressure) can produce a lot of braking force, however if the friction co-efficiency is too high, it causes jerks making it difficult to handle. The most important thing about friction coefficient is how fast the friction co-efficiency of the brake pad builds up to its maximum after the brake is applied. The Pads are deemed inefficient if this process takes a long time, this is generally described as having low initial bite (braking force).
The second most important thing is it does not get affected by temperature. Normally, friction coefficient tends to be low when the brake disc temperature is low or extremely high. If the friction coefficient is low at low temperatures, the brake pad will not generate enough braking force in street driving conditions; if it is low at high temperatures, it will cause problems on racing circuits. Efficiency at high temperatures for so called racing pads and ones with stable braking force from the start line to the goal is regarded as of good quality.
The third important thing is the stability against change of speed. It is deemed too dangerous and thus cannot be put on the market if the friction co-efficiency is unstable at the speed of 180km/h even if it braking is stable at the speed of 60km/h. We, brake pad makers, are doing our best everyday to develop materials which retain a stable and high level of friction coefficient in any circumstance. We always aim to present the best performance compound by combining a variety of materials including well-known elements which are used to enhance or stabilize the friction coefficient such as steel fiber, copper, glass fiber, Kevlar, carbon, ceramic and titan.
That it for today, more to come tomorrow :wink:
So I am going to give out a some information about braking system, so you can completely understand what and why are you buying -
-----------------------------------------------------------------
What is Friction Co-efficiency?
One of the important elements in the evaluation of brake pads is “friction co-efficiencyâ€Â. Friction co-efficiency represents the degree of friction between two objects, note the smaller the figure is, the smaller the friction between the objects are, i.e. the objects are easier to slip, while the larger the figure is, the bigger the friction is, i.e. more difficult to slip. Simply friction co-efficiency can be explained like this, to move an object of 100kg horizontally, it takes a force of 100kg, while if the object is moved by a force of 50kg, the friction coefficient between the object and the road surface is 0.5. In the case of brakes for vehicles, friction coefficient is calculated using braking torque generated during braking (G deceleration) and fluid pressure (pedal pressure) required for generating the torque, the formula for the calculation is as follows,
Normally, normal pad friction coefficient is around 0.3~0.4 and that of sports pads is 0.4~0.5. If the friction coefficient is high, that means light fluid pressure (i.e. light pedal pressure) can produce a lot of braking force, however if the friction co-efficiency is too high, it causes jerks making it difficult to handle. The most important thing about friction coefficient is how fast the friction co-efficiency of the brake pad builds up to its maximum after the brake is applied. The Pads are deemed inefficient if this process takes a long time, this is generally described as having low initial bite (braking force).
The second most important thing is it does not get affected by temperature. Normally, friction coefficient tends to be low when the brake disc temperature is low or extremely high. If the friction coefficient is low at low temperatures, the brake pad will not generate enough braking force in street driving conditions; if it is low at high temperatures, it will cause problems on racing circuits. Efficiency at high temperatures for so called racing pads and ones with stable braking force from the start line to the goal is regarded as of good quality.
The third important thing is the stability against change of speed. It is deemed too dangerous and thus cannot be put on the market if the friction co-efficiency is unstable at the speed of 180km/h even if it braking is stable at the speed of 60km/h. We, brake pad makers, are doing our best everyday to develop materials which retain a stable and high level of friction coefficient in any circumstance. We always aim to present the best performance compound by combining a variety of materials including well-known elements which are used to enhance or stabilize the friction coefficient such as steel fiber, copper, glass fiber, Kevlar, carbon, ceramic and titan.
That it for today, more to come tomorrow :wink: