Definition

1. Noun:
   • A type of hydraulic brake: A drum brake is a braking system where friction is generated by pressing brake shoes against the inner surface of a rotating drum attached to the wheel.

Usage

• Noun:
  • Older cars often used drum brakes on the rear wheels.
  • The mechanic explained that the squealing noise was due to worn-out shoes in the drum brake.

Advanced Usage

• Technical Context: In automotive engineering, "drum brake" refers specifically to the assembly comprising the brake drum, shoes, wheel cylinder, springs, and adjuster.
  • While less common today, drum brakes are still studied for their historical significance in automotive design.

Variants and Related Words

• Brake drum (n): The rotating, drum-shaped component against which the brake shoes press.
  • The brake drum needed to be resurfaced to ensure proper braking.
• Brake shoe (n): The curved friction element that presses against the drum.
  • Replacing the brake shoes is a standard part of drum brake maintenance.

Synonyms

• Internal expanding brake: A more technical synonym describing the same mechanism where the friction elements expand inside a drum.

Related Phrases

• Drum brake assembly: Refers to the complete set of parts that make up the drum brake system.
  • The shop ordered a new drum brake assembly for the restoration project.

Noun

1. hydraulic brake in which friction is applied to the inside of a spinning drum by the brake shoe