Brake Work Example 14

ACT Work Keys Level: 7
NATEF Task(s): Background

Problem:

If in a given brake system the pressure is 1200 psi from the master cylinder. The surface area of the piston is 10 in², in this floating caliper system.

(Pascal's law: force = pressure × area)

1. What is the force capability applied at the caliper piston?
   
2. What is the force being applied to the rotor?

Solution:

1. Pressure = 1200 psi.
   Area 10 in²
   1200 psi × 10 in² = 12000 pounds of force
2. In a floating caliper system the pressure is equal to on both side of the rotor. This doubles the pressure on the rotor.
   2 × 12000 pounds of force = 24000 pounds of force on the rotor.