A disc rotor is a crucial component of a vehicle’s disc braking system. It is a flat, circular metal disc (usually made of cast iron or steel) that is attached to the wheel hub and rotates along with the wheel. When the driver applies the brakes, the brake pads press against the disc rotor, creating friction that slows down or stops the vehicle.
Key Features:
Made from durable, heat-resistant materials like cast iron or carbon composite (for high-performance vehicles).
Can be solid or ventilated (ventilated rotors have internal vents to dissipate heat faster).
Often feature slotted or drilled surfaces to improve braking performance and heat dissipation.
Function:
Provides a friction surface for brake pads to clamp onto.
Helps convert the vehicle’s kinetic energy into heat energy, which is then dispersed to stop the wheel.
Maintenance Tip:
Disc rotors should be checked regularly for wear, warping, or scoring. If they become too thin or uneven, they should be resurfaced or replaced to maintain braking efficiency and safety.