roller-bearing

A mechanic installs a roller-bearing into a machine assembly.

Definition

1. Noun:
   • A mechanical component: A "roller-bearing" is a bearing that uses cylindrical rollers to reduce friction between moving parts, typically in machinery or vehicles.
   • A type of rolling-element bearing: It is a specific design where rollers (small cylinders) are placed between two rings (races) to support radial or axial loads with minimal resistance.

Usage Examples

• Noun:
  • The mechanic replaced the worn roller-bearing in the conveyor system. (The cylindrical roller bearing was swapped to ensure smooth operation.)
  • High-speed trains rely on precision roller-bearings to maintain stability. (The bearings reduce friction in the wheels.)

Advanced Usage

• "roller-bearing assembly": the complete unit consisting of rollers, races, and a cage.

  • The roller-bearing assembly was lubricated before installation. (The entire bearing unit was prepared.)

• "tapered roller-bearing": a variant where the rollers are conical, designed to handle combined loads.

  • Tapered roller-bearings are commonly used in car hubs. (These specific bearings manage both radial and thrust forces.)

Variants and Related Words

• Roller (n): a cylinder that rotates, often used as part of a bearing.

  • The roller in the bearing was made of hardened steel. (The cylindrical component.)

• Bearing (n): a machine part that supports moving parts and reduces friction.

  • The bearing was damaged due to lack of lubrication. (General term for friction-reducing components.)

• Roller-bearing cage (n): a structure that holds the rollers in place.

  • The cage prevented the rollers from touching each other. (The separator for the rollers.)

Synonyms

• Cylindrical roller bearing: a more precise technical term for the same component.
• Rolling-element bearing: a broader category that includes roller-bearings and ball bearings.

Phrasal Verbs (Not applicable)

Related Idioms (Not applicable)