Skip to main content
packing box

packing box

7.5
A small space holding soft material around a moving shaft to stop leaks
  • noun
  • Specialized
translation icon : caja de empaquetado
  • You must replace the worn packing in the packing box to maintain an effective seal.

Examples

  • The packing box was filled with foam.

  • The engineer inspected the packing box for signs of leakage before starting the machine.

  • Routine maintenance of the packing box extends the lifespan of the pump.

  • Is the packing box ready for use?

  • The technician inspected the packing box to ensure it was secure and functioning properly.

  • To prevent any leaks, it is essential to fill the packing box tightly with the right material around the shaft.

  • During the maintenance check, the engineer found that the packing box had worn out and needed replacement.

Synonyms

stuffing box
vspacking box
  • Specialized
9.8

A small space around a moving shaft filled with packing material to make a seal and stop leaks

is the alternative name for the same chamber and sealing function

Surface Forms

packing box singular
packing boxes plural

Morphology

packing + box

The phrase is compositionally built from 'packing' + 'box' so a learner who knows both words would likely infer a container related to packing material (e.g., a box with foam). However, the provided technical sense (a sealed chamber compressing packing around a shaft) is specialized and not directly predictable from the everyday meanings, so the expression is not fully transparent to a B1 learner.

Etymology

Packing box comes from a small box that holds the packing — material like rope or cloth — pressed around a moving rod to stop leaks. So it means a small chamber that creates a 'seal' around a shaft or piston to prevent leakage.