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What is a Drum Brake in Cars?

1 Answers

SanNatalie

07/29/25 10:05pm

A drum brake in cars is a braking device that uses stationary brake shoes inside the brake drum to create friction against the rotating brake drum attached to the wheel, thereby reducing the wheel's rotation speed. This cast iron component, resembling a tambourine, is also known as a brake drum. The main components of a drum brake include: the brake backing plate, wheel cylinder, brake shoes with related linkages, springs, pins, and the brake drum itself. Drum brakes typically require replacement around 60,000 kilometers. The working principle involves the brake drum being fixed to and rotating at the same speed as the tire. During braking, hydraulic pressure pushes the brake shoes to contact the inner edge of the brake drum, generating friction to resist the tire's rotation and achieve braking.

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