# Two tubes joined by taper

**URL:** <https://discourse.shapr3d.com/t/two-tubes-joined-by-taper/25712>\
**Category:** Modeling Questions\
**Created:** [May 8, 2023, 2:33pm UTC](https://discourse.shapr3d.com/t/two-tubes-joined-by-taper/25712 "2023-05-08T14:33:38Z")\
**Posts on this page:** 12\
**Page:** 1

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**Author:** ![Donnercruz](https://avatars.discourse-cdn.com/v4/letter/d/7ba0ec/32.png) [@Donnercruz](https://discourse.shapr3d.com/u/Donnercruz)\
**Post date:** [May 8, 2023, 2:33pm UTC](https://discourse.shapr3d.com/t/two-tubes-joined-by-taper/25712/1 "2023-05-08T14:33:38Z")

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I’m trying to make a tapered dust collection port for my wood shop, 3d printing. The two pieces I’m trying to connect at different diameters.

I’ve created the two tubes at the right diameter for each. How do I smoothly connect them with a conical section?

 ![IMG_0400](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/6/e/6ef6a083e2599769e9fbca43cc594e87508c2cd3.jpeg)

Please provide a detailed description of the issue. Provide as much information as possible, including screenshots and/or screen recordings. For screen recording, we recommend using Loom ([loom.com](http://loom.com)), an easy-to-use screen recording tool that works on Windows, iPadOS, and macOS. Loom videos can be easily embedded on the forum simply by pasting their URL. Topics without detailed information will be automatically closed. For subscription, billing, and licensing-related issues please open a support ticket using the link below. Please contribute to the community with meaningful, high-quality posts, and always use a respectful tone.

[https://support.shapr3d.com/hc/en-us/requests/new](https://support.shapr3d.com/hc/en-us/requests/new)

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**Author:** ![McD](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/mcd/32/15504_2.png) [@McD](https://discourse.shapr3d.com/u/McD)\
**Post date:** [May 8, 2023, 2:50pm UTC](https://discourse.shapr3d.com/t/two-tubes-joined-by-taper/25712/2 "2023-05-08T14:50:41Z")

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Use Loft in the Tools menu. Select one surface, then the other.

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**Author:** ![Donnercruz](https://avatars.discourse-cdn.com/v4/letter/d/7ba0ec/32.png) [@Donnercruz](https://discourse.shapr3d.com/u/Donnercruz)\
**Post date:** [May 8, 2023, 3:15pm UTC](https://discourse.shapr3d.com/t/two-tubes-joined-by-taper/25712/3 "2023-05-08T15:15:54Z")

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Tried on the edge face. Not a valid surface.

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**Author:** ![TigerMike](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/tigermike/32/32650_2.png) [@TigerMike](https://discourse.shapr3d.com/u/TigerMike)\
**Post date:** [May 8, 2023, 3:43pm UTC](https://discourse.shapr3d.com/t/two-tubes-joined-by-taper/25712/4 "2023-05-08T15:43:01Z")

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I’d first make both cylinders solid. Then do the loft and union. From there do a shell for your desired wall thickness.

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**Author:** ![welshsteve](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/welshsteve/32/16111_2.png) [@welshsteve](https://discourse.shapr3d.com/u/welshsteve)\
**Post date:** [May 8, 2023, 7:50pm UTC](https://discourse.shapr3d.com/t/two-tubes-joined-by-taper/25712/5 "2023-05-08T19:50:43Z")

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The simple solution would be to make the cylindrical pieces solid then loft between them before shelling to the desired thickness. That’s assuming both parts have the same wall thickness.

An alternative approach (appropriate for parts with different wall thickness or parts with other features that would be lost if they were made solid) is to split the parts before lofting then union again…

[![](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/9/f/9f9a618c5a84ed453fd5184c67fac54d9cbf12b3.jpeg "Lofting between odd shapes") ](https://www.youtube.com/watch?v=KWrkRMKT_Tg)

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**Author:** ![TigerMike](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/tigermike/32/32650_2.png) [@TigerMike](https://discourse.shapr3d.com/u/TigerMike)\
**Post date:** [May 8, 2023, 9:44pm UTC](https://discourse.shapr3d.com/t/two-tubes-joined-by-taper/25712/6 "2023-05-08T21:44:29Z")

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Although shelling will create a uniform wall thickness, it is easy to alter the thickness if needed.

[https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/f/6/f6fda061afe3d7c75e9083292071b81b5189f70c.mov](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/f/6/f6fda061afe3d7c75e9083292071b81b5189f70c.mov)

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**Author:** ![welshsteve](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/welshsteve/32/16111_2.png) [@welshsteve](https://discourse.shapr3d.com/u/welshsteve)\
**Post date:** [May 8, 2023, 11:47pm UTC](https://discourse.shapr3d.com/t/two-tubes-joined-by-taper/25712/7 "2023-05-08T23:47:23Z")

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Yes, of course, This would be the natural choice.

My alternative approach is just something I frequently use when joining two parts that already have details that would be otherwise lost if I made the parts solid.

There are several other approaches one could use depending on the particular workflow.

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<div class="post-metadata">

**Author:** ![Donnercruz](https://avatars.discourse-cdn.com/v4/letter/d/7ba0ec/32.png) [@Donnercruz](https://discourse.shapr3d.com/u/Donnercruz)\
**Post date:** [May 9, 2023, 1:33am UTC](https://discourse.shapr3d.com/t/two-tubes-joined-by-taper/25712/8 "2023-05-09T01:33:14Z")

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Thanks for all the reply’s. It printing now. We’ll see how it turns out

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<div class="post-metadata">

**Author:** ![TigerMike](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/tigermike/32/32650_2.png) [@TigerMike](https://discourse.shapr3d.com/u/TigerMike)\
**Post date:** [May 9, 2023, 2:52am UTC](https://discourse.shapr3d.com/t/two-tubes-joined-by-taper/25712/9 "2023-05-09T02:52:19Z")

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Does your dust collection port require a tapered fit in the corresponding part (hose, whatever)?  
You might want to give one or both ends a tapered fit. Here I used a 5° taper for demo purposes. I believe the actual taper is more like 2-3°.

[https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/7/9/799626a61ff118adc25c6bcc04552986d7e4e659.mov](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/7/9/799626a61ff118adc25c6bcc04552986d7e4e659.mov)

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<div class="post-metadata">

**Author:** ![Donnercruz](https://avatars.discourse-cdn.com/v4/letter/d/7ba0ec/32.png) [@Donnercruz](https://discourse.shapr3d.com/u/Donnercruz)\
**Post date:** [May 9, 2023, 7:22pm UTC](https://discourse.shapr3d.com/t/two-tubes-joined-by-taper/25712/10 "2023-05-09T19:22:17Z")

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It does require a tapered fit. The main hose is a 4” coupler and some of my tools have smaller ports, to top it off, the smaller ones aren’t universal in sizing, so I’ll probably be doing a few of these.

 ![IMG_0933](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/0/e/0e4e27032460dd5ee5e4344711e7b8c48bf53583.jpeg)

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<div class="post-metadata">

**Author:** ![McD](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/mcd/32/15504_2.png) [@McD](https://discourse.shapr3d.com/u/McD)\
**Post date:** [May 9, 2023, 8:47pm UTC](https://discourse.shapr3d.com/t/two-tubes-joined-by-taper/25712/11 "2023-05-09T20:47:47Z")

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David, not Shapr3D related, but you may want to checkout [www.magport.net](http://www.magport.net)  
I use these to fit my vacuum hoses to various tools.

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<div class="post-metadata">

**Author:** ![welshsteve](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/welshsteve/32/16111_2.png) [@welshsteve](https://discourse.shapr3d.com/u/welshsteve)\
**Post date:** [May 9, 2023, 9:48pm UTC](https://discourse.shapr3d.com/t/two-tubes-joined-by-taper/25712/12 "2023-05-09T21:48:51Z")

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Looks great. Love the colour too! 👍