roller bearing
Definition
Noun: A type of bearing that uses cylindrical rollers to maintain separation between moving parts, reducing friction. It is designed to support radial and axial loads with low rotational resistance.
Usage
A "roller bearing" is a mechanical component. It is used to describe a specific bearing assembly that employs rollers, not balls. * The machine's axle rotates smoothly on a set of roller bearings. * For heavy machinery, a roller bearing is often more durable than a plain bearing. * The engineer specified a tapered roller bearing for the application.
Advanced Usage
- Technical Specification: Often modified by the roller shape (e.g., cylindrical roller bearing, tapered roller bearing, spherical roller bearing) to indicate its specific load-handling characteristics.
- A tapered roller bearing is essential for handling combined radial and thrust loads in a vehicle wheel hub.
Variants and Related Words
- Bearing (n): The general term for any machine element that constrains relative motion and reduces friction between moving parts.
- Ball bearing (n): A bearing that uses spherical balls as the rolling elements, distinct from a roller bearing.
- Needle roller bearing (n): A type of roller bearing using very long, thin cylindrical rollers.
Synonyms
- Antifriction bearing
- Rolling-element bearing (This is the broader category that includes both roller bearings and ball bearings.)
Related Phrases
- Roller bearing assembly: Refers to the complete unit, including the rollers, inner and outer races, and often a cage or retainer.
- The entire roller bearing assembly must be replaced as a unit.
Noun
-
bearings containing small metal balls
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