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I wonder what the "sprocket" in this image is called, since I cannot find anything like it when I searching for sprocket in an online shop like www.grainger.com or globalindustrial.com.

Is there a specific definition for it?

Sprocket wheel

  • General English doesn't have specific terms for specialized kinds of gears. You'd have to ask on a relevant engineering forum. – Dan Bron Jun 14 '17 at 11:00
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    As @DanBron suggests, try e.g. our sister site, bicycles.stackexchange.com – MikeRoger Jun 14 '17 at 11:02
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    By the way, the correct way to ask the question is what is it called, not how is it called. This seems to be a common mistake of non-native speakers. – Barmar Jun 14 '17 at 20:12
  • Chain sprocket or chainring. – Phil Sweet Jun 15 '17 at 19:51
  • It's a sprocket. And probably not a bicycle sprocket, as the configuration is wrong on several points. – Hot Licks Jun 15 '17 at 23:01
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I am unsure if you are looking for a general term, or a description of the actual sprocket in the picture.

The one in the picture is a rear sprocket , specifically a 428 sprocket, a 48T (tooth) 4-bolt rear sprocket for a small motorcycle or moped, possibly a Honda Passport. 428 refers to the specifications of the chain required for the sprocket design.

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