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I created this gear (from the Blender additional meshes add-on), and I would like to fill the gap to make the inside like the inside of a cylinder:

enter image description here

I tried selecting the edges and typing F but that filled the top and bottom faces:

enter image description here

I added a cylinder inside the gear and tried F again but no success here either:

enter image description here

enter image description here

Not sure how to do this...

Blend:

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1 Answer 1

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If the rings on the top and bottom have the same number of vertices, you can select the top and bottom edges, then press the space bar and type bridge edge loops:

enter image description here

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  • $\begingroup$ Brilliant! I always forget about this function... Not sure what the difference between Fill and Bridge Edge Loops is... Or why it's not combined into one! $\endgroup$ Commented Jun 10, 2016 at 5:49
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    $\begingroup$ They are two very different tools fill will make a face (most likely an Ngon) connecting all selected vertices. Bridge will make quads connecting two edge loops that have the same number of vertices. $\endgroup$
    – user1853
    Commented Jun 10, 2016 at 5:51
  • $\begingroup$ @fabriced please read the link that is part of the answer (in blue letters). You'll see the tools at your disposal. $\endgroup$
    – user1853
    Commented Jun 10, 2016 at 5:57

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