1. Drum Brake

How it works:

A drum brake has a round drum attached to the wheel.Inside it, brake shoes press outward against thedrum's surface when you press the brake pedal

Key parts:Wheel cylinder, brake shoes, springsbacking plate, self-adiuster.

Usage: Mostly found on the rear wheels of smaller orolder cars.

Advantages:Low cost,works well as a parking brake

Disadvantages:Less efficient cooling, lower brakingperformance than disc brakes.

2. Disc Brake

How it works:

A metal disc (rotor) is fixed to the wheel. A calipesqueezes brake pads on both sides of the disc tocreate friction and stop the whee.

Key parts: Disc rotor, caliper assembly, brake padswheel bearing.

Usage: Common on front wheels, and now widely usedon al four whees in modern cars

Advantages: Better cooling, higher braking efficiency,more reliable.

Disadvantages:More expensive than drum brakes。

3. Electric Brake

How it works:

Uses an electromagnet and actuating arm to apply thebrake.When current flows, the magnet is attracted tothe drum surface, moving the actuating arm andpushing brake shoes against the drum.

Key parts: Magnet, actuating arm, brake shoesadjuster, return springs.

Usage: Mostly in trailers and electric parking brake systems.

Advantages:Easy control with electrical signal, less manual effort.

Disdvantages:Needs electrical supply, not ascommon in standard cars.

4. Air Brake

How it works:

Compressed air pushes air pushes a brake chamber piston. whichmoves the brake cam. The cam spreads the brake

shoes against the drum.

Key parts: Brake drum, brake chamber, slack adjusterprake cam, prake shoes.

Usage: Mostly in heavy vehicles like trucks and buses

rarely in passenger cars.

Advantages: Very powerful, reliable for heavy loads, no hydraulic fluid leaks.

Disadvantades:Expensive and complex requires compressors and air tanks.

Summary:

Drum Brake->Simple, cost-effective, mostly rearwheels.

Disc Brake ->Modern standard, efficient and reliable

Electric Brake->Used in trailers & parking brakesystems.

Air Brake->Heavy-duty vehicles, high braking power