Disc Brake Assembly

Cost-Effective: 

Drum brakes are generally less expensive to manufacture and maintain, making them a cost-effective choice, especially for rear-wheel applications in budget-conscious vehicles.

Parking Brake Function: 

Drum brakes often serve as parking brakes due to their self-locking mechanism, providing reliable parking security.

Less Susceptible to Environmental Factors: 

Enclosed drum brake design is less prone to water and debris ingress, making them suitable for certain off-road and harsh environments.

Smooth Braking Engagement: 

Drum brakes offer smoother engagement due to their gradual application, making them suitable for certain driving conditions and passenger comfort.

Design:

Drum brakes use brake shoes expanding against a drum, while caliper assy disc brake employ calipers squeezing brake pads onto a rotating disc.

Friction Area:

Drum brake assembly has internal friction surfaces, while disc brake rotor and hub assembly have external rotors with larger friction areas for improved heat dissipation.

Heat Dissipation:

Disc rotor assembly dissipates heat more effectively, reducing the risk of brake fade during prolonged or heavy use.

Maintenance:

Disc brake assembly parts are generally easier to inspect and maintain, whereas drum brakes can be more complex to adjust and overhaul.

Cooling:

Disk brake assembly has natural air cooling due to its exposed design, while drum brakes are less efficient at dissipating heat.

Weight:

Components of disk brake caliper assembly are lighter, contributing to reduced unsprung weight and improved handling compared to drum brakes.

Emergency Brake:

Drum brakes often serve as parking/emergency brakes due to their self-locking mechanism, while disc brakes require additional mechanisms.

Application:

Disc brakes are more common in front-wheel-drive vehicles and high-performance applications, while drum brakes are still used in some rear-wheel-drive and light-duty applications.