What is Brake? Difference Between "Disc" and "Drum" Brakes.

 Brake

 Definition

      Brake is a mechanical device which is used to stop or reduce the speed of a vehicle, wheels,axle..etc.

A brake system is one of the most important parts of a vehicle ,no matter what kind of vehicle people use , an efficient braking system will always be of utmost concern to ensure the safety.

• Brakes uses friction of brake shoes and to convert kinetic energy developed by the vehicle into heat energy.
• When we apply brakes , the pads or shoes that press against the brake drums or rotor convert kinetic energy into thermal energy via friction.

Types Of Brakes

Mechanical Brakes

• Drum brake
• Disc Brake

Hydraulic Brakes

• Power brakes
• Air Brake
• Air hydraulic brake
• Vacuum brake 
• Electric Brake

Difference Between Disc and Drum Brakes

https://autoziast.wordpress.com/2017/06/13/brakes-from-drums-to-discs/

Sl. No	DISC BRAKE	DRUM BRAKE
1.	It has better anti-fade characteristics	The brake effect decrease with constant, prolonged application of brake.
2.	The weight is less, resulting in lower inertia.	Comparatively, the weight of the drum brakes is more.
3.	The total frictional area is less.	Total frictional area is more.
4.	Wear on the frictional surfaces is more uniform.	Non uniform wear of friction surfaces.
5.	It is more stable.	Comparatively Less stable.
6.	Maintenance and services of the brakes is easy.	For service, drum is to be removed which takes more time
7.	Better ventilation property.	Lower ventilation property.
8.	Fast braking and better braking force.	Slow braking.
9.	Generally used for modern bikes, car.	Used for trucks, bus.
10.	Cost is more.	Comparatively, cost is Less