# Chamfer Double Taper?

**URL:** <https://discourse.shapr3d.com/t/chamfer-double-taper/13956>\
**Category:** Modeling Questions\
**Created:** [July 20, 2021, 6:15pm UTC](https://discourse.shapr3d.com/t/chamfer-double-taper/13956 "2021-07-20T18:15:58Z")\
**Posts on this page:** 20\
**Page:** 1

<div class="post-metadata">

**Author:** ![VmusicV](https://avatars.discourse-cdn.com/v4/letter/v/a9a28c/32.png) [@VmusicV](https://discourse.shapr3d.com/u/VmusicV)\
**Post date:** [July 20, 2021, 6:15pm UTC](https://discourse.shapr3d.com/t/chamfer-double-taper/13956/1 "2021-07-20T18:15:58Z")

</div>

Hi,  
I have a curve (part of a guitar body); and I want a deeper chamfer in the middle of the curve, and then I want it to taper on both ends of the curve.

YES —- I saw previous posts; but these only show how to taper a chamfer on one end. I figured out how to scale ONE end and have the chamfer trim down to zero (see screen snapshot); but I want the chamfer to taper down on both ends.

I kind of don’t want to redraw my whole body, and make it TWO bodies; because in the end, I’ll 3D print it, and I need it to be one body.

Any suggestions?  
Thanks In Advanced

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/b/b1b8494bf76e3f67a7dbc35aaa234f80e219ed8e.jpeg)  
 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/f/f1288a651443138560812262766e4ada785d773f.jpeg)

---

<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:** [July 20, 2021, 7:52pm UTC](https://discourse.shapr3d.com/t/chamfer-double-taper/13956/2 "2021-07-20T19:52:53Z")

</div>

Here’s a possible workaround. I subtracted a cylinder that was angled at 45°. The radius of the cylinder is smaller than the radius of the contoured part you wish to have a tapered chamfer.

[https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/d/d6b7710f64038a592dabe1dc4115712e52f5571f.MOV](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/d/d6b7710f64038a592dabe1dc4115712e52f5571f.MOV)

---

<div class="post-metadata">

**Author:** ![VmusicV](https://avatars.discourse-cdn.com/v4/letter/v/a9a28c/32.png) [@VmusicV](https://discourse.shapr3d.com/u/VmusicV)\
**Post date:** [July 21, 2021, 1:44am UTC](https://discourse.shapr3d.com/t/chamfer-double-taper/13956/3 "2021-07-21T01:44:26Z")

</div>

Thank you - the finished product is what I want.  
I’m not sure exactly how to get the cylinder positioned exactly where I need. I guess I can try to play around [more time]. I realize a tapered chamfer is rather complicated, but for a CAD tool it doesn’t seem too odd.

Thanks Again

---

<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:** [July 21, 2021, 3:05am UTC](https://discourse.shapr3d.com/t/chamfer-double-taper/13956/4 "2021-07-21T03:05:53Z")

</div>

I understand what you are saying and what I had shown is a mere workaround. Here’s a variation that might help. Occasionally I will make a part semi-transparent to help me when performing a desired result. Interesting phenomenon is that the area where the **Subtract** took place ends up being semi-transparent, which by the way can be useful in certain circumstances.

[https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/1/18ac045e0e3fe206f9df5e174f236e602475f0d8.MOV](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/1/18ac045e0e3fe206f9df5e174f236e602475f0d8.MOV)

---

<div class="post-metadata">

**Author:** ![VmusicV](https://avatars.discourse-cdn.com/v4/letter/v/a9a28c/32.png) [@VmusicV](https://discourse.shapr3d.com/u/VmusicV)\
**Post date:** [July 21, 2021, 5:43pm UTC](https://discourse.shapr3d.com/t/chamfer-double-taper/13956/5 "2021-07-21T17:43:55Z")

</div>

Mike……Thank you for this.

Any suggestions on how to create the cylinder that “cuts” the tapered chamfer?

Each side of the instrument is unique. My gut feel /guess is that I’m drawing a circle, that’ll extrude to make the cylinder……but I’m not certain how/where to draw it?

Perhaps two points in the circle intersect the two endpoints of the curve I am trying to chamfer….but then what?

---

<div class="post-metadata">

**Author:** ![milouchien](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/milouchien/32/10020_2.png) [@milouchien](https://discourse.shapr3d.com/u/milouchien)\
**Post date:** [July 21, 2021, 6:00pm UTC](https://discourse.shapr3d.com/t/chamfer-double-taper/13956/6 "2021-07-21T18:00:39Z")

</div>

I had a similar idea to Mike but when I looked - he’d done it better…

But I did think that you could create the “cylinder” by copy/moving the curves from the side of your original guitar body sketch and using that as the curved edge. Once you have this curved line, add a chord between its ends to create a closed shape you can extrude upwards, rotate around an axis passing through the curve ends and lower onto the guitar body for your subtraction.

---

<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:** [July 21, 2021, 6:56pm UTC](https://discourse.shapr3d.com/t/chamfer-double-taper/13956/7 "2021-07-21T18:56:45Z")

</div>



---

<div class="post-metadata">

**Author:** ![VmusicV](https://avatars.discourse-cdn.com/v4/letter/v/a9a28c/32.png) [@VmusicV](https://discourse.shapr3d.com/u/VmusicV)\
**Post date:** [July 21, 2021, 7:37pm UTC](https://discourse.shapr3d.com/t/chamfer-double-taper/13956/8 "2021-07-21T19:37:34Z")

</div>

WOW!!! Thank you, Thank you, Thank you!!! I’ll say it backwards: WOW!!

---

<div class="post-metadata">

**Author:** ![VmusicV](https://avatars.discourse-cdn.com/v4/letter/v/a9a28c/32.png) [@VmusicV](https://discourse.shapr3d.com/u/VmusicV)\
**Post date:** [July 22, 2021, 12:41am UTC](https://discourse.shapr3d.com/t/chamfer-double-taper/13956/9 "2021-07-22T00:41:10Z")

</div>

I do want to say to the Sharpr 3D folks monitoring……… we need a work around here. This is a sort of work around, but it’s not MEASURABLE; that is I’m cutting a shape with another shape, but I can’t measure and get the “cut” or the chamfer I want.

With the chamfer tool, you tell it.

PLEASE - while the “scaling” kind of works on one end of a chamfer; make it work on both ends. Thank you!!

(and yes, there will still be somebody who wants variable depth chamfer; oh well)

---

<div class="post-metadata">

**Author:** ![VmusicV](https://avatars.discourse-cdn.com/v4/letter/v/a9a28c/32.png) [@VmusicV](https://discourse.shapr3d.com/u/VmusicV)\
**Post date:** [July 22, 2021, 1:11am UTC](https://discourse.shapr3d.com/t/chamfer-double-taper/13956/10 "2021-07-22T01:11:37Z")

</div>

I tried…… I followed, or as closely followed as I could, the video. Here’s the end results: something kinda what I want……but again, it’s not a MEASURED chamfer.  
[insert crying icon here; get out Fusion 360]

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/c/c6d45c4223ac9ec887dc335a68f363162337c1ba.jpeg)  
 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/1/181d9780e14b4c512ebd494efb084386201deaf5.jpeg)  
 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/7/777babd98748e3d4fc892f1d0a5dd3366d1636cc.jpeg)

---

<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:** [July 22, 2021, 4:16pm UTC](https://discourse.shapr3d.com/t/chamfer-double-taper/13956/11 "2021-07-22T16:16:45Z")

</div>

I think you can obtain a measured chamfer by following @KPeter method on your other post.

> [@Weird Behavior with Tapered Chamfer](https://discourse.shapr3d.com/t/weird-behavior-with-tapered-chamfer/13964):
>
> So……I tried performing a tapered chamfer, as I have seen in other posts/tutorials on line. But something weird is happening. Where I am trying to taper it to zero — which it “seems” should be basically the original shape it started (aka with no chamfer); well it contorts part of the shape. You can see it in the pictures below.

---

<div class="post-metadata">

**Author:** ![NathanD](https://avatars.discourse-cdn.com/v4/letter/n/dec6dc/32.png) [@NathanD](https://discourse.shapr3d.com/u/NathanD)\
**Post date:** [July 24, 2021, 9:04am UTC](https://discourse.shapr3d.com/t/chamfer-double-taper/13956/12 "2021-07-24T09:04:42Z")

</div>

@VmusicV what about using the scale tool?

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/d/d94a4c486ac7f62b0df0b9abf892f552193d47dc.jpeg)

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/b/bae116836572d7cf4ee9aca7179543fb776d8499.jpeg)

Then you can manipulate the size with a combination of adding more chamfer and rescaling.

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/f/ff109d7620892f2993c5093218cb46bb8b2a2ebf.jpeg)

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/5/569957ec11af0723517783cdd0d65fa1b3755eb3.jpeg)

Edit: I just noticed your points on scaling, so this might not be what you’re looking for.

---

<div class="post-metadata">

**Author:** ![VmusicV](https://avatars.discourse-cdn.com/v4/letter/v/a9a28c/32.png) [@VmusicV](https://discourse.shapr3d.com/u/VmusicV)\
**Post date:** [July 24, 2021, 7:18pm UTC](https://discourse.shapr3d.com/t/chamfer-double-taper/13956/13 "2021-07-24T19:18:17Z")

</div>

Hi,  
FIRST……Thank you for your reply.  
secondly…… how specifically did you SCALE and get those results (a crescent or semi-circle with tapered ends, and a chamfer in the middle) ???

I am somewhat of a Newbie to Sharpr 3D, and I’ve used Fusion 360 before. :::: I do not get those results.

Might I trouble you to list the specific steps, or make a screen video of the process?

I “think” what you did was ONLY scale on the bottom line of the chamfered edge, correct?  
I “think” I got it, or very close to it.

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/a/a62c85a8184eda03076983e96a6ab16f61458c73.jpeg) -

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/7/7ddd828207e88ef9d83b8235fd4d6a13d2c9fd92.jpeg)

---

<div class="post-metadata">

**Author:** ![NathanD](https://avatars.discourse-cdn.com/v4/letter/n/dec6dc/32.png) [@NathanD](https://discourse.shapr3d.com/u/NathanD)\
**Post date:** [July 24, 2021, 9:29pm UTC](https://discourse.shapr3d.com/t/chamfer-double-taper/13956/14 "2021-07-24T21:29:20Z")

</div>

I used the scale tool on the chamfer surface, not the edges.

---

<div class="post-metadata">

**Author:** ![VmusicV](https://avatars.discourse-cdn.com/v4/letter/v/a9a28c/32.png) [@VmusicV](https://discourse.shapr3d.com/u/VmusicV)\
**Post date:** [July 25, 2021, 2:11am UTC](https://discourse.shapr3d.com/t/chamfer-double-taper/13956/15 "2021-07-25T02:11:46Z")

</div>

That WORKED …… I don’t understand why nobody else knew this?

Thank you, Thank you!!

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/7/7a8dcc183ea4b7c58209540d61378d6eff6247f9.jpeg)

---

<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:** [July 25, 2021, 2:57am UTC](https://discourse.shapr3d.com/t/chamfer-double-taper/13956/16 "2021-07-25T02:57:43Z")

</div>

Great! Nice to hear.  
Question: Does this meet your requirement as a MEASURED chamfer?  
If so, where is it measurable?  
Thanks.

---

<div class="post-metadata">

**Author:** ![VmusicV](https://avatars.discourse-cdn.com/v4/letter/v/a9a28c/32.png) [@VmusicV](https://discourse.shapr3d.com/u/VmusicV)\
**Post date:** [July 25, 2021, 12:14pm UTC](https://discourse.shapr3d.com/t/chamfer-double-taper/13956/17 "2021-07-25T12:14:16Z")

</div>

GREAT QUESTION……yes, and no.  
To make a prototype instrument; from design to prototype on a CNC machine, yes it will work.

To be honest, after I do the scaling and the taper happens, I don’t know how to measure a distance in SharpR3D?

---

<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:** [July 25, 2021, 6:44pm UTC](https://discourse.shapr3d.com/t/chamfer-double-taper/13956/18 "2021-07-25T18:44:13Z")

</div>

Here I put together a way for you to measure the chamfer at the center of the arc. In this example I chose a 0.5" x 0.5" chamfer. Therefore the diagonal dimension is 0.707". The **Scale** method does a nice job of bringing the ends to a point however it also scaled down the center diagonal as well. The ends are not exact but can be adjusted close by tweaking the scale number as I did in my example making it 59.7%.

You can determine a precise measurement if you use the method that @KPeter suggested. If you want to specify the diagonal dimension then you need to divide that number by 1.414 and use it as the offset for the chamfer. (Example: a 0.5" diagonal dimension would require you to use a chamfer of 0.354" x 0.354".) The beauty of using Peter’s method is that you can change the angle of the chamfer to be anything other than 45° if you like. The 2nd half of the video shows Peters method.

[![](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/4/c/4c5c0f8c107dc626cfb6653b4f3e2625571d2b27.jpeg "Contoured Chamfer") ](https://www.youtube.com/watch?v=Cv_Lm5Pexsk)

---

<div class="post-metadata">

**Author:** ![VmusicV](https://avatars.discourse-cdn.com/v4/letter/v/a9a28c/32.png) [@VmusicV](https://discourse.shapr3d.com/u/VmusicV)\
**Post date:** [July 25, 2021, 10:48pm UTC](https://discourse.shapr3d.com/t/chamfer-double-taper/13956/19 "2021-07-25T22:48:08Z")

</div>

Well……OK, Houston we have a problem……

So I suspect because my curve is NOT symmetrical - but the scale here doesn’t work. You can see the pic below. Now I’m kind back to square one……

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/3/36a39289c2611604f8edadabcdc9ebaefe861b57.jpeg)  
’

---

<div class="post-metadata">

**Author:** ![VmusicV](https://avatars.discourse-cdn.com/v4/letter/v/a9a28c/32.png) [@VmusicV](https://discourse.shapr3d.com/u/VmusicV)\
**Post date:** [July 25, 2021, 10:52pm UTC](https://discourse.shapr3d.com/t/chamfer-double-taper/13956/20 "2021-07-25T22:52:17Z")

</div>

WOW!!! This is amazing. Thank you soOOOOOoo much!

[Next page](https://discourse.shapr3d.com/t/chamfer-double-taper/13956.md?page=2)