This document discusses disk brakes, including their history, types, advantages, and how they work. Disk brakes use friction pads that squeeze a metal disk attached to the wheel hub to slow rotation. There are two main types - opposed piston brakes, which use pistons on both sides of the disk for even pressure, and floating caliper brakes, which use a piston on the inner side to push the caliper and outer pad against the disk. Disk brakes are more efficient than drum brakes as they dissipate heat better and maintain performance longer under stress.

1. Disk breaking system

2. CONTENT
Introduction
History
Why Disk Brakes?
Types
How They Work
Why are disk brakes more efficient?
Advantages
Disadvantages
Conclusion

3. INTRODUCTION
 Disc brakes are a brake system that slows a wheel’s
rotation by squeezing an attached metal disc in a viselike
hydraulic caliper.
 Disc brakes use the same principle as bicycle
handbrakes, but on a bike the brake pads press against
the wheel itself.
 On a car, the disc is part of the hub to which the wheel is
mounted. The disc, technically called a rotor, is clearly
visible through spoked wheels.

4. HISTORY OF DISK BRAKES
 Ever since the invention of the wheel, while
moving we have to stop the movement, so for
that we invented breaks.
 As the level of technology of human
transportation has increased, the mechanical
devices used to slow down and stop vehicles has
also become more complex.

5. WHY DISK BRAKES?
Disc brakes use friction to create braking
power.
Disc brakes create braking power by forcing
flat friction pads against sides of rotating disc

6. DISC BRAKES TYPES
 Opposed Piston Type Disc Brakes
 Floating Caliper Type Disc Brakes

7. OPPOSED PISTON TYPE DISC BRAKES
 This type of disc brake has pistons on both sides of the
brake rotor, and there are no moving parts in the caliper
assembly other than the pistons themselves.
 This type of caliper provides very even pressure
distribution between pads and rotor providing better
braking performance, especially under severe braking
conditions.

8. FLOATING CALIPER TYPE DISC BRAKE
 For Passenger Cars
 Floating caliper type disc brakes have a piston (or
pistons) only on the inner side of the rotor. When the
brake is engaged, a piston pushes the inner brake pad
against the rotor.
 This generates a reaction force that moves the caliper
itself along the slide pin, pushing the outer pad against
the rotor to clamp it from both sides and achieve braking
action.

9. HOW THEY WORK
When the brakes are applied hydraulically actuated
pistons move the friction pads into contact with the
disc, applying equal and opposite forces the later.
On releasing the brakes the rubber sealing rings act
as return springs and retract the pistons and the
friction pads away from the disc.

10. WHY ARE DISK BRAKES MORE EFFICIENT?
 Disk brakes under high pressure on Drum brakes during
braking, disk brakes are more efficient.
 No loss of brake power due to overheating or partial
contact from brake drum parts expansion.
 Disk brakes can withstand higher loads and its efficiency
is maintained considerably longer even under the highest
stresses.

11. ADVANTAGES OF DISK BRAKE
– Greater amounts of heat to
atmosphere
– Cooling more rapid
– Self-adjusting
– Don’t need periodic
maintenance
– Easier to service

12. DISADVANTAGES OF DISK BRAKE
 Prone to noise
 Rotors warp easier
 Not self-energizing
 Hard to use as parking brakes

13. CONCLUSION
Many automobiles are equipped with air
actuated sliding caliper disk brakes. By
using these, we can get higher
performance rate in braking .

14. THANKS 

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