I would like to make a sphere like hole in a piece of wood like the image below. Is there a special bit or tool to do this?

enter image description here

  • 2
    There's some overlap with this previous Question.
    – Graphus
    Nov 6, 2015 at 19:44
  • Also closely related to this
    – Ast Pace
    Nov 6, 2015 at 21:32
  • @Graphus When I read this I thought it would be a dupe of the question you linked. Do you think that it is not a duplicate?
    – Matt
    Nov 9, 2015 at 14:41
  • @Matt, I don't think it's an exact duplicate no.
    – Graphus
    Nov 9, 2015 at 16:13

1 Answer 1


You're looking for a round nose bit, like the one pictured below.

round nose

It also looks like the edges of the hole are rounded over, for which you'd also use a roundover bit.


You could also take care of rounding the edges with sandpaper or a file/rasp.

  • The roundover bit won't work in this case due to the bearing and the concave hole. But a template and a collar to the router would.
    – LosManos
    Nov 7, 2015 at 20:03
  • The roundover will work for the most part, as long as it's set up correctly. It will require a little fairing with sandpaper afterward.
    – grfrazee
    Nov 8, 2015 at 2:29
  • And a plunge router Nov 9, 2015 at 2:23

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