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VIDEO: How a Deep Grove Ball Bearing is Made

November 22, 2011 by Paul Wharton

Radial ball bearings are found so many of today’s moving mechanical devices.  However, most people do not know how they’re made. Generally speaking, they are made of seven pieces (inner ring, outer ring, balls, retainer, closures, coatings, and lubricants).  However, these seemingly simple components can be manufactured into literally billions of bearing varieties.

The following video premiered on Discovery Channel’s popular “How It’s Made” series and is a great representation about the high degree of automation used in producing precision ball bearings.  In fact, the brand of bearings being manufactured is one of the brands supplied by AST Bearings (AST is an authorized, factory-direct distributor for NTN Bearings).

For more technical information about bearings, visit the bearing “Resource Center.”


  1. That’s a really cool video about ball bearings. I had no idea how they made them or how precisely they had to be matched (that is the inner and outer rings). I also found it facinating how they actually made the balls out of chopped steel rods. Thanks for bringing this to my attention. I’m definitely going to share this video with others!

    Comment by Laurie Coyle — November 22, 2011 @ 4:37 PM

  2. Nice video about how ball bearings are made. Thanks for sharing!

    Comment by Pat Linville — November 28, 2011 @ 12:02 PM

  3. It’s actually a great and useful piece of info. I’m glad that you shared this helpful info with us. Please keep us informed like this. Thanks for sharing.

    Comment by Listwy — January 11, 2012 @ 5:14 AM

  4. Thx 4 the post. I’m always looking for information like this.

    Comment by Monty — January 20, 2012 @ 4:38 AM

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