Disc brakes use calipers to squeeze brake pads against a rotor to create friction and slow the rotation of an axle. Bicycle brakes squeeze pads against the wheel, while disc brakes squeeze pads against a disc attached to the wheel or axle. Disc brakes are increasingly used on large vehicles where drum brakes were previously used, as disc brakes provide more predictable braking and fade less when hot. Disc brakes have advantages over drum brakes such as being less prone to issues caused by water trapped between brake components.

1. DISC BRAKES
Presented by
NAME : S.ARUNKUMAR
YEAR : IV YEAR
DEPARTMENT : MECHANICAL ENGINEERING
COLLEGE : SUDHARASAN ENGG COLLEGE

2. DISC BRAKE
• A Disc brake is a type of brake that uses
the calipers to squeeze pairs of pads against a
disc or "rotor" to create friction This action
slows the rotation of a shaft, such as a vehicle
axle, either to reduce its rotational speed or to
hold it stationary. The energy of motion is
converted into waste heat which must be
dispersed.

3. WORKING
• Bicycle brakes have a caliper, which squeezes
the brake pads against the wheel. In a disc
brake, the brake pads squeeze the rotor instead
of the wheel, and the force is transmitted
hydraulically instead of through a cable.
Friction between the pads and the disc slows
the disc down

4. ASSEMBLY

5. BRAKING FORCE

6. SLOTS AND HOLES

7. HEAVY VEHICLE
• Disc brakes are increasingly used on very large and heavy
road vehicles, where previously large drum brakes were
nearly universal. One reason is that the disc's lack of self-
assist makes brake force much more predictable, so peak
brake force can be raised without more risk of braking-
induced steering or jackknife on articulated vehicles.
Another is disc brakes fade less when hot, and in a heavy
vehicle air and rolling drag and engine braking are small
parts of total braking force, so brakes are used harder than
on lighter vehicles, and drum brake fade can occur in a
single stop

9. Typical compositions for asbestos (organic) lining used
on older vehicles.

11. ADVANTAGE
• Disc brakes are also not easy to cause water stuck
between the brake tread and discs that will disrupt
the brake surface and reduce braking power. The
water that is trapped between the brake shoes and
the disk is referred to as the water fade.
• During its use, disc brakes can remove dust
particles trapped by themselves. In addition to
dust particles, the fine particles generated by the
surface of the brake lining will also be wasted on
their own

12. DISADVANTAGE
• The surface of the brake shoes and the disc
became hard causes of this noise. Another
deficiency is the ineffective disc brakes when
used as a parking brake. This happens because
the brake pads have difficulty in retaining a
smooth rotor surface. The disc brake system is
only effective to reduce the vehicle's speed, but
it is not as effective as drum brakes capable to
self-energized to remain stationary while
parked

13. THANK YOU