Difference between disk and drum brakes

Posted By: Sm Adminon: November 18, 2015In: Miscellaneous

Disk brakes:
Disk brake is a wheel that slows rotation of the wheel by friction caused by pushing brake pads against a brake disc with a set of calipers. The brake disk is usually made of cast iron.
Drum brake:
A Drum brake is a brake that uses friction caused by a set of shoes or pads that press against a rotating drum-shaped part which is called a brake drum. It is more economical to maintain.
Differences:

Basis	Disk brake	Drum brake
Definition (www.oxforddictionaries.com)	A type of vehicle brake employing the friction of pads against a disc which is attached to the wheel.	A type of vehicle brake in which brake shoes press against the inside of a drum on the wheel.
History	The disc brake was first developed and used in England in 1890s.	The modern automobile drum brake was first used in a car made by Maybach in 1900, although the principle was only later patented in 1902 by Louis Renalt. He used woven asbestos lining for the drum brake lining, as no alternative dissipated heat like the asbestos lining, though Maybach had used a less sophisticated drum brake.
Word origin	It was originated in between 1945-50	It was originated in between 1945-50
Repair and maintenance	It is easier to service.	It is not as much easier to service.
Good at	It is good for braking.	It is not as good as disc brake for braking.
Pronunciation	Eng (UK): /dɪsk/ /breɪk/ Eng (US): /disk/ /brāk/	Eng (UK): /drʌm/ /breɪk/ Eng (US): /drəm/ /brāk/
Cost	They are expensive.	They are cheaper.
Advantages/Benefits	Its advantages are: Easy inspection Better stopping power Self-adjusting Better heat dissipation using slotted or drilled or vented rotors Can support ABS	Its advantages are: Simple and can work by mechanical and hydraulic actuators Does not require power boosters to magnify or boost Braking force ( as drum brakes are Servo brakes , it can multiply braking force ) Can lock wheels , faster than Disc brakes (due to servo effect) Safely fitted inside wheel hub ,so no problem of external damage
Disadvantages	Its disadvantages are: Requires assisted braking systems (power boosters ,Vacuum assisted ,for which they depend on external resources) Costs speaks	Its disadvantages are: Poor response , the braking force will not disengage as soon as foot is lifted off from foot (due to servo effect) Poor heat dissipation More propables of Dust and water collection inside the drum There is not much brake biasing possible
Example in Sentence	Disc brakes costs more than the drum brakes. Disc brakes are much prone to noise.	Drum brakes are cheaper. Drum brakes are smaller in size.