follow Dictionary.com

Capitol vs. capital? What's the difference?

ball bearing

noun, Machinery
1.
a bearing consisting of a number of hard balls running in grooves in the surfaces of two concentric rings, one of which is mounted on a rotating or oscillating shaft or the like.
2.
any of the balls so used.
Origin of ball bearing
1880-1885
1880-85
Related forms
ball-bearing, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
Cite This Source
Examples from the Web for ball bearing
Historical Examples
  • So that they cannot be injured by waste oil from the ball bearing, or by water or snow.

  • The man spun around as if mounted on a ball bearing and pulled by strings.

    Pursuit Lester del Rey
  • The same principle has been applied to mechanics in the ball bearing.

    Farm Engines and How to Run Them James H. Stephenson
  • The work, which is the cone for a ball bearing, is shown at a by the dotted lines and also by the detail view to the right.

    Turning and Boring Franklin D. Jones
  • When you get into the movement of a ball bearing disk, your body is free to move.

    Warren Commission (5 of 26): Hearings Vol. V (of 15) The President's Commission on the Assassination of President Kennedy
  • A pilot box-tool for finishing another type of ball bearing cone is shown at B.

    Turning and Boring Franklin D. Jones
  • It is a board that is on a pivot, a ball bearing, and it has a tendency to give you certain exercises in twisting your body.

    Warren Commission (5 of 26): Hearings Vol. V (of 15) The President's Commission on the Assassination of President Kennedy
  • Oil the sweeper regularly about once a month by putting one drop of oil on the ball bearing on the hub of each wheel.

    Mechanical Devices in the Home Edith Louise Allen
British Dictionary definitions for ball bearing

ball bearing

noun
1.
a bearing consisting of a number of hard steel balls rolling between a metal sleeve fitted over the rotating shaft and an outer sleeve held in the bearing housing, so reducing friction between moving parts while providing support for the shaft
2.
a metal ball, esp one used in such a bearing
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Cite This Source
ball bearing in Science
ball bearing  

  1. A ring-shaped track containing hard metal balls that roll freely, used to reduce friction where a rotating element (such as an axle) is attached to a fixed point.

  2. A hard ball used in such a track.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source

Word of the Day

Difficulty index for ball bearing

Few English speakers likely know this word

Word Value for ball

6
9
Scrabble Words With Friends

Nearby words for ball bearing