Brake Pads and Brake Disc

Description

Brake pads are the friction components in a disc brake system.

What they do

• When you press the brake pedal, brake pads clamp onto the brake disc

• The friction created slows down or stops the vehicle

Key points

• Made of friction material bonded to a metal backing plate

• Designed to wear out over time (this is normal)

• Usually replaced more often than brake discs

Common signs of worn brake pads

• Squealing or screeching noise

• Grinding sound (very worn — urgent)

• Reduced braking performance

• Brake warning light (on some vehicles)

Brake Disc (Brake Rotor)

The brake disc (also called a rotor) is a round metal disc attached to the wheel hub.

What it does

• Spins with the wheel

• Provides a surface for the brake pads to grip

• Converts motion into heat through friction

Key points

• Made of cast iron or steel

• Designed to withstand high heat

• Wears more slowly than brake pads

Common signs of worn brake discs

• Vibration or pulsation when braking

• Grooves or scoring on the disc surface

• Reduced braking efficiency

• Disc thickness below minimum limit

How They Work Together

1. You press the brake pedal

2. Hydraulic pressure pushes the caliper pistons

3. Brake pads squeeze the brake disc

4. Friction slows the wheel and stops the vehicle

👉 Both parts must be in good condition for safe braking.

Maintenance Tip

• Brake pads are usually replaced every 30,000–60,000 km

• Brake discs may last 2–3 pad changes, depending on use

• Always replace pads on both sides of the axle (left & right)

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