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My original post has become too confusing. I'll start over.

How do I create a hollow cylinder? I am using Blender 3.0.

Response to Allen Simpson Answer: It works, but ........

Initial sequence => Add > Mesh > Cylinder > F9 > Cap Fill Type menu appears > Cap Fill Type: Nothing => results in a hollow cylinder.

--- Case 1: Wrench icon (right side) > Add Modified > Solidify > Thickness > Changes the cylinder wall thickness.

This works!

--- Case 2: Scene Properties (triangle icon) > Units: Imperial - Length: Inches ... N > Dimensions: 0.5, 0.5, 1 ... Wrench icon (right side) > Add Modified > Solidify > Thickness: starts at 0.393701 in => cylinder wall is very thin

Changing thickness makes the wall thicker, but is inaccurate for a 0.5 in diameter cylinder. Setting thickness to 20 inches fills about half of the (outside dimension 0.5 inch diameter) cylinder hole

enter image description here

ttom
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    Since your question is asking for clarifications on another Q&A, you can try and add a comment for further information on the answers instead of a new question. The users are both still active on this site so I'm sure you'll get your information rapidly. Cheers – Gorgious Dec 07 '21 at 15:06
  • To create a circle press Shift A > Mesh > Circle, then press Tab to go in Edit mode, select all and press E to extrude inwards. Note that the shortcuts have changed for the Knife tool, to activate it's now K, but A to cut orthogonally – moonboots Dec 07 '21 at 15:12
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    If you're struggling on how to create a circle mesh then start by watching beginner introductory tutorials on Youtube, those are quite basic questions. This answers https://blender.stackexchange.com/a/150547/1245 outlines the procedure quite well. There isn't any "tag" for new user questions nor could it be added. Tags are for questions in general, not users asking them – Mr Zak Dec 07 '21 at 15:13
  • You can use arithmetic operation (e.g. subtraction) with another cylinder of a smaller size. – DaveNuk Dec 07 '21 at 16:06
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    The F9 menu is specifically to adjust the last operation. If you just opened a file there is no previous operation to adjust. – Allen Simpson Dec 13 '21 at 15:54
  • Hello ttom. You need to apply scale to the object with ctrl + a – Allen Simpson Dec 14 '21 at 17:28
  • Allen, not sure what happened. When open today the thickness is 1" ... which is also incorrect. In Object mode, ctrl+a displays the Apply menu. Now what? – ttom Dec 15 '21 at 14:03

3 Answers3

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  1. Begin with a cylinder primitive with no fill with ⇧ Shift + A >mesh>cylinder (change the cap fill type to nothing with redo panel by pressing F9 and choosing nothing instead of Ngon)

  2. ↹ Tab into edit mode , press A to select the object if not already selected.

  3. Use the edit mode> solidify operator with ⌃ Ctrl + F followed by S or
    face>solidify faces and adjust thickness via F9

enter image description here

Timaroberts
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Maybe not the right one for you, but..

  • Select top and bottom faces of a cylinder
  • I inset them
  • CtrlE Edge Menu > 'Bridge Edge Loops'

enter image description here

Robin Betts
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    I'm starting over. I have a cylinder. I select Edit Mode. How do select the top and bottom face? – ttom Dec 07 '21 at 16:05
  • @ttom I don't think it's the best tutorial out there but you should definitely follow the first few episodes of https://www.youtube.com/watch?v=TPrnSACiTJ4 it would save you and us a lot of headaches since you're asking for really trivial things – Gorgious Dec 07 '21 at 17:28
  • Or... https://www.youtube.com/playlist?list=PLa1F2ddGya_-UvuAqHAksYnB0qL9yWDO6 to get you started. – Robin Betts Dec 07 '21 at 17:33
  • I've updated my original post. – ttom Dec 09 '21 at 13:09
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    Why don't you create a cilinder, remove the top and bottom, go to Modifiers, choose Solidify, adjust to your liking and be done? – Jaco Dec 09 '21 at 14:47
  • Not sure how to do that? See the comments I've added. – ttom Dec 12 '21 at 13:06
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Start with your scenario b) and make a hollow cylinder.

enter image description here

Instead of a Solidify operation from Edit Mode, use a Solidify Modifier.

This will add a procedural effect that you can change on the fly.

enter image description here

enter image description here

Allen Simpson
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