gear-box

The mechanic opens the gear-box to inspect the parts.

Definition

1. Noun:
   • A mechanical component: "gear-box" refers to a casing or housing that contains a system of gears, typically used in vehicles and machinery to transmit power from the engine to the wheels or other moving parts, allowing for changes in speed and torque.
   • Synonymous with transmission: In automotive contexts, "gear-box" is often used interchangeably with "transmission," especially in British English, to denote the assembly of gears that controls the vehicle's motion.

Usage Examples

• Noun:
  • The mechanic inspected the gear-box for any signs of wear or damage. (The part of the vehicle that contains the gears was examined.)
  • A faulty gear-box can cause difficulty in shifting gears while driving. (A problem with the gear housing leads to poor performance.)
  • The heavy machinery’s gear-box was designed to handle high torque loads. (The gear system in industrial equipment was built for strength.)

Advanced Usage

• "to strip a gear-box": to remove the gears from the housing for repair or replacement.

  • He had to strip the gear-box to replace a broken cog. (He disassembled the gear housing to fix a damaged gear.)

• "gear-box ratio": the relationship between the rotational speeds of the input and output shafts in the gear-box.

  • A higher gear-box ratio increases torque but reduces speed. (The gear configuration affects performance.)

Variants and Related Words

• Gearbox (n): an alternative spelling without the hyphen, more common in modern usage.

  • The car's gearbox needs an oil change. (The transmission system requires new lubricant.)

• Gear (n): a toothed wheel that engages with another to transmit motion.

  • Each gear in the box must be properly aligned. (Individual toothed components within the housing.)

• Gear-case (n): a synonym for "gear-box," emphasizing the protective casing.

  • The gear-case was sealed to prevent dirt from entering. (The protective housing for the gears.)

Synonyms

• Transmission: the assembly of gears and other parts that transmits power from the engine to the wheels.

  • The transmission in this car is a manual gear-box. (The gear system is manually operated.)

• Gear assembly: a set of gears housed together.

  • The gear assembly was replaced during the repair. (The group of gears in the box.)

Related Idioms (None applicable)

• There are no common idioms directly involving "gear-box," as it is a technical term.

Notes on Usage

• "Gear-box" is primarily used in British English; in American English, "transmission" is more common, though "gearbox" is used in technical contexts.
• The hyphenated form "gear-box" is less common today, with "gearbox" as the standard spelling.