# Cannot change thickness of tube

**URL:** <https://discourse.shapr3d.com/t/cannot-change-thickness-of-tube/30592>\
**Category:** Modeling Questions\
**Created:** [February 29, 2024, 3:26pm UTC](https://discourse.shapr3d.com/t/cannot-change-thickness-of-tube/30592 "2024-02-29T15:26:19Z")\
**Posts on this page:** 12\
**Page:** 1

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**Author:** ![dmf92](https://avatars.discourse-cdn.com/v4/letter/d/6a8cbe/32.png) [@dmf92](https://discourse.shapr3d.com/u/dmf92)\
**Post date:** [February 29, 2024, 3:26pm UTC](https://discourse.shapr3d.com/t/cannot-change-thickness-of-tube/30592/1 "2024-02-29T15:26:19Z")

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Hi, I’ve spent a few hours trying to increase the thickness of the tube. I need to keep the outside diameter the same but change the inside to 50, so that there’s a total thickness of 8.5mm instead of 3mm. I’ve attached a video to show the geometry I’m working with more clearly.

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**Author:** ![dmf92](https://avatars.discourse-cdn.com/v4/letter/d/6a8cbe/32.png) [@dmf92](https://discourse.shapr3d.com/u/dmf92)\
**Post date:** [February 29, 2024, 3:34pm UTC](https://discourse.shapr3d.com/t/cannot-change-thickness-of-tube/30592/2 "2024-02-29T15:34:15Z")

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I don’t want to delete a surface I might need but I tried to show the deletable edges

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**Author:** ![Oregonerd](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/oregonerd/32/8012_2.png) [@Oregonerd](https://discourse.shapr3d.com/u/Oregonerd)\
**Post date:** [February 29, 2024, 3:34pm UTC](https://discourse.shapr3d.com/t/cannot-change-thickness-of-tube/30592/3 "2024-02-29T15:34:22Z")

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Are there any fillets applied that might interfere? Try deleting the fillets if so. You should be able to select the inner face of the tube and resize unless some other geometry interferes.

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**Author:** ![dmf92](https://avatars.discourse-cdn.com/v4/letter/d/6a8cbe/32.png) [@dmf92](https://discourse.shapr3d.com/u/dmf92)\
**Post date:** [February 29, 2024, 3:34pm UTC](https://discourse.shapr3d.com/t/cannot-change-thickness-of-tube/30592/4 "2024-02-29T15:34:58Z")

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I did try deleting all the surfaces I could in various combinations. But nothing seemed to work

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**Author:** ![Oregonerd](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/oregonerd/32/8012_2.png) [@Oregonerd](https://discourse.shapr3d.com/u/Oregonerd)\
**Post date:** [February 29, 2024, 3:38pm UTC](https://discourse.shapr3d.com/t/cannot-change-thickness-of-tube/30592/5 "2024-02-29T15:38:42Z")

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The video has no animation to it. can you show us a side cross section of the part?

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**Author:** ![dmf92](https://avatars.discourse-cdn.com/v4/letter/d/6a8cbe/32.png) [@dmf92](https://discourse.shapr3d.com/u/dmf92)\
**Post date:** [February 29, 2024, 3:40pm UTC](https://discourse.shapr3d.com/t/cannot-change-thickness-of-tube/30592/6 "2024-02-29T15:40:27Z")

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![Screenshot 2024-02-29 at 16.39.54](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/e/c/ec04dca69521423024315b2b84cd81ebf0468808.png)  

The video didn’t work? I tried reuploading now + doing what you said

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**Author:** ![Oregonerd](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/oregonerd/32/8012_2.png) [@Oregonerd](https://discourse.shapr3d.com/u/Oregonerd)\
**Post date:** [February 29, 2024, 3:45pm UTC](https://discourse.shapr3d.com/t/cannot-change-thickness-of-tube/30592/7 "2024-02-29T15:45:20Z")

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Down in the lower left corner is the cross section tool, Looks like a toilet paper roll cut in half. Click on that for that part and send screen shot.

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**Author:** ![dmf92](https://avatars.discourse-cdn.com/v4/letter/d/6a8cbe/32.png) [@dmf92](https://discourse.shapr3d.com/u/dmf92)\
**Post date:** [February 29, 2024, 3:47pm UTC](https://discourse.shapr3d.com/t/cannot-change-thickness-of-tube/30592/8 "2024-02-29T15:47:31Z")

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![Screenshot 2024-02-29 at 16.47.14](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/e/e/ee6eb8dca4faaac50796abcca45c1bef2172e06a.png)

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**Author:** ![dmf92](https://avatars.discourse-cdn.com/v4/letter/d/6a8cbe/32.png) [@dmf92](https://discourse.shapr3d.com/u/dmf92)\
**Post date:** [February 29, 2024, 3:48pm UTC](https://discourse.shapr3d.com/t/cannot-change-thickness-of-tube/30592/9 "2024-02-29T15:48:05Z")

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deleted number but still wouldn’t generate

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<div class="post-metadata">

**Author:** ![dmf92](https://avatars.discourse-cdn.com/v4/letter/d/6a8cbe/32.png) [@dmf92](https://discourse.shapr3d.com/u/dmf92)\
**Post date:** [February 29, 2024, 3:49pm UTC](https://discourse.shapr3d.com/t/cannot-change-thickness-of-tube/30592/10 "2024-02-29T15:49:18Z")

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![Screenshot 2024-02-29 at 16.49.04](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/6/f/6f70b7b91890617d78376f7d44f042ddeb894e09.png)  
think I got it!

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<div class="post-metadata">

**Author:** ![dmf92](https://avatars.discourse-cdn.com/v4/letter/d/6a8cbe/32.png) [@dmf92](https://discourse.shapr3d.com/u/dmf92)\
**Post date:** [February 29, 2024, 3:55pm UTC](https://discourse.shapr3d.com/t/cannot-change-thickness-of-tube/30592/11 "2024-02-29T15:55:01Z")

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![Screenshot 2024-02-29 at 16.54.32](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/4/4/44eff94f4509e4fc936d8269ce8758935ff42e6d.jpeg)

my guess would be one of these many edges causing an issue

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<div class="post-metadata">

**Author:** ![dmf92](https://avatars.discourse-cdn.com/v4/letter/d/6a8cbe/32.png) [@dmf92](https://discourse.shapr3d.com/u/dmf92)\
**Post date:** [February 29, 2024, 4:05pm UTC](https://discourse.shapr3d.com/t/cannot-change-thickness-of-tube/30592/12 "2024-02-29T16:05:24Z")

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I **think** I solved it.

I used split body to create a new additional edge. I increase thickness above the new line, where I needed it. Then adjusted chamfers etc to my linking before hitting union to recombine the two parts