Automotive Brake SystemThe Basics

What stops it?FrictionKinetic frictionCreates heatHeat is brakes worst enemyWeight transfers to front70% braking performed by front brakes

Applying the frictionDisc brakes will use pads to squeeze the rotorDrum brakes use shoes to press outwards against drum

Lining materialNon-metallicMade from synthetic fibers (used to be asbestos)Semi-metallicMade from iron and synthetic fibersMore fade resistant - harder padMore prone to squealingFull-metallicMade from sintered metalsVery hard pad

Hydraulics - its how the pressure is multiplied and transferred

Hydraulic pressure is distributed equally in all directions

Same line pressure to all wheels

The pressure that is applied at piston A is the same as what is applied to piston B

The hydraulic pressure is the same, but the applied force can be changed by changing the piston size.

The area of the piston is determined by using the formula:3.14 X R2

The amount force is calculated by multiplying the pressure times the areaP X A = Force

You cant have something for nothing

The caliper piston needs more applied force for multiple reasons