Introduction (Copy1706814543)

A5 Disc Brake (Part 1 of 2)

Learning Objectives

  1. Outline the Components and Functionality of Disc Brakes.
  2. Detail the Structural Design of Disc Brakes.
  3. Examine the Characteristics and Role of Brake Pads.
  4. Describe the Various Disc Brake Designs.
  5. Characterize the Features of Rear Disc Parking Brakes.

Parts and Function of Disc Brakes: Disc brakes function by using one or more pistons to press friction material (pads) against both sides of a rotating disc (also known as a rotor). While some manufacturers may refer to it  as a “disk,” the term “disc” is officially recognized by the Society of Automotive Engineers (SAE) and is the most widely used spelling in the industry. The rotor, which is integral to the disc brake system, is connected to the wheel and plays a crucial role in halting its motion. Disc brakes are predominantly installed on the front wheels of modern vehicles and are increasingly being used on the rear wheels of many cars. Their adoption over drum brakes is largely due to their superior stopping power and reduced likelihood of brake fade, making them particularly effective for front brakes, which are responsible for 60% to 80% of a vehicle’s total stopping power.

Advantages of Disc Brakes: The transition to disc brakes was accelerated by stringent federal brake performance standards, but the shift from front drum brakes was inevitable due to the overall superiority of disc brakes. The disc brake system offers numerous significant advantages and only a few minor drawbacks.