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Joined:	25 Nov 2008
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25 Feb 2009 19:14:22 IST

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what are ball bearings and how itz use lessens friction???

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what are ball bearings and how itz use lessens friction???

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Murali G

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Joined: 15 Jul 2007

Posts: 395

25 Feb 2009 20:05:52 IST

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The ball bearings will change the sliding friction into the rolling friction. As rolliing friction is less than the sliding friction, the machine part moves freely.

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