
1) Anti-friction device 2) French invention 3) Friction-reducing device 4) Friction-reducing sphere 5) Like some autograph hounds 6) Pea-sized machine part 7) Round machine part
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https://www.crosswordclues.com/clue/ball-bearing

hard round spheres, usually steel, set in series between two bearing races with cups and cones, or in a sealed cartridge bearing, ranging from 1/4 to 5/32 inch.
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http://bikecult.com/bikecultbook/glossary_english.html
[advertisement] Ball Bearing was a 1992 television advertisement for the Lexus ES 300, which introduced the luxury sedan to television audiences. It was created by Team One, a unit of Saatchi & Saatchi. The advertisement showed a ball bearing rolling smoothly down the panel seams of a Lexus sedan, thus demonstrating the precise quality of i...
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http://en.wikipedia.org/wiki/Ball_Bearing_(advertisement)

A ball bearing is a type of rolling-element bearing that uses balls to maintain the separation between the bearing races. The purpose of a ball bearing is to reduce rotational friction and support radial and axial loads. It achieves this by using at least two races to contain the balls and transmit the loads through the balls. In most applications...
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http://en.wikipedia.org/wiki/Ball_bearing

one of the two members of the class of rolling, or so-called antifriction, bearings (the other member of the class is the roller bearing). The ... [1 related articles]
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http://www.britannica.com/eb/a-z/b/11

A type of bearing for rotating machinery. A ball bearing consists of two concentric rings of steel, which teogether form a 'race' for a number of steel balls (also referred to as ball bearings) positioned between them. The inner ring is fixed to a shaft and the outer one to a support.
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http://www.daviddarling.info/encyclopedia/B/ball_bearing.html

a bearing incorporating a peripheral assembly of balls
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http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=411-42-03

an antifriction rolling type bearing containing rolling elements in the form of balls.
Found on
http://www.encyclo.co.uk/local/21121

an antifriction bearing consisting of inner and outer races separated by hardened steel balls.
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http://www.horizonsunlimited.com/gear-up/motorcycle-terms-and-glossary

[
n] - bearings containing small metal balls
Found on
http://www.webdictionary.co.uk/definition.php?query=ball%20bearing
needle bearing noun bearings containing small metal balls
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https://www.encyclo.co.uk/local/20974

A series of metal balls mounted in a grease-filled circular RACE encasement. Use of ball-bearing races allows casters to swivel either horizontally or vertically.
Found on
https://www.encyclo.co.uk/local/21080
No exact match found.