I just started to learn Blender and met a problem when using Bevel modifier when creating a cogwheel. Most edges where processed fine, but a few of them got errors:

Problem with Bevel modifier

Problem with Bevel modifier

I have checked all the normals, they are correct. Here is the model without the modifier:

Cogwheel model

It seems ok, but I worry about black color of the edge exactly where the bevel makes mistakes

  • 1
    $\begingroup$ Removed doubles? $\endgroup$
    – 4-K
    Commented Jun 5, 2018 at 16:54
  • $\begingroup$ Would it be possible for you to upload the blend file so we can take a look? $\endgroup$
    – 8176135
    Commented Jun 5, 2018 at 22:16

1 Answer 1


Thanks to hint from 4-K, I indeed found out that the problem was because of duplicates. To check it, I just moved single vertices in edit mode.

To remove them I did the following:

  1. Open the edit mode for vertices.

  2. Select all the vertices using A key.

  3. Open special menu using W key.

  4. Click "Remove Doubles".

Then Blender said that there were 8 redundant vertices, and I got correctly working bevel modifier.


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