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How should I describe this part which looks like a small gear so that I can research replacements?

image of a pulley

This came with my FLSUN 3D printer, which may be based on a Prusa design.

0scar
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K Mmmm
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    Not sure I understand your question. It's the driven gear for the belt which either drives the X-axis or Y-axis depending on to which drive motor it's attached. Is that what you're asking? – Pᴀᴜʟsᴛᴇʀ2 Jun 27 '19 at 23:15
  • Thanks I just realized how unclear that was. I was asking the product name of this part. So that I could do my own research and find where to purchase a replacement. My 3D printer kit was missing one. – K Mmmm Jun 27 '19 at 23:19

2 Answers2

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This is a timing belt pulley.

Specifically, is a GT2 timing pulley, 2 mm pitch (between teeth), 6 mm wide. The drive diameter is measured by the number of teeth (16 in this case) , the shaft diameter (bore) is measured in mm.

The 'GT2' part refers to the tooth profile, some other examples are shown half way down this page.

Sean Houlihane
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It is an "aluminum timing pulley"

https://www.google.com/search?psb=1&tbm=shop&q=aluminum%20timing%20pulley&ved=0CAMQr4sDKAFqFwoTCMis1KHmiuMCFRoMswAdMqUElxAB

https://www.ebay.com/i/152446519860?chn=ps&var=453435947176

K Mmmm
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