journal-box

A technician installs a journal-box onto the axle assembly.

Definition

1. Noun:
   • Mechanical component: A "journal-box" is a housing or enclosure that contains and supports a journal (the part of a shaft or axle that rotates within a bearing). It is specifically used in machinery to protect the bearing and retain lubricant.

Usage Examples

• Noun:
  • The engineer inspected the journal-box for any signs of wear or leakage. (The housing for the rotating shaft's bearing was checked.)
  • A well-lubricated journal-box reduces friction in heavy machinery. (The enclosure helps maintain smooth rotation.)

Advanced Usage

• "to pack a journal-box": to fill the housing with lubricant or packing material.

  • Before starting the engine, the mechanic packed the journal-box with grease. (The housing was filled with lubricant.)

• "journal-box failure": a breakdown of the bearing or housing due to overheating or lack of lubrication.

  • Journal-box failure can cause a train axle to seize up. (The housing's bearing stops functioning.)

Variants and Related Words

• Journal (n): the part of a shaft or axle that rotates within a bearing.

  • The journal was polished to reduce friction. (The rotating surface was smoothed.)

• Box (n): a container or housing.

  • The metal box protected the gears inside. (The container shielded internal components.)

Synonyms

• Bearing housing: a structural component that encloses a bearing.

  • The bearing housing must be sealed against dust. (The enclosure for the bearing.)

• Axle box: a specific type of journal-box used on railway vehicles.

  • The axle box on the train wheel was damaged. (The housing for the axle's bearing.)

Related Idioms

• (No common idiomatic expressions exist for this technical term.)

Phrasal Verbs

• (No phrasal verbs are associated with this noun.)