<p>TinkerCAD is a fine tool for simple designs, but when you need to fillet or chamfer corners, this involves too many actions where you cut out the parts to get the requested fillet/chamfer. It might be interesting to save time to move to a different design tool.</p>
<p>This geometry is recreated in a few minutes in e.g. Fusion360, considering this is a simple design, you need to change the order of the actions to fillet the object properly. Fillet the corners of the box prior to filetting the box itself:</p>
<p><a href="https://i.sstatic.net/CF1Zd.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/CF1Zd.png" alt="enter image description here" /></a></p>
<p><a href="https://i.sstatic.net/arheg.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/arheg.png" alt="enter image description here" /></a></p>
<p><a href="https://i.sstatic.net/GeqIw.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/GeqIw.png" alt="enter image description here" /></a></p>
<p>In case the design is way more complex an alternative solution would be to join a cube in the corner and round that:</p>
<p><a href="https://i.sstatic.net/phkT3.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/phkT3.png" alt="enter image description here" /></a></p>
<p><a href="https://i.sstatic.net/7DFFa.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/7DFFa.png" alt="enter image description here" /></a></p>
<p><a href="https://i.sstatic.net/05wMn.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/05wMn.png" alt="enter image description here" /></a></p>
<p><a href="https://i.sstatic.net/jLnjE.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/jLnjE.png" alt="enter image description here" /></a></p>

CC BY-SA 4.0
2023-10-29T12:40:17.573Z
2023-10-29T12:40:17.573Z
0scar
<p>I have planned a simple object in TinkerCAD from a <em>box</em> with radius set to 1 mm.</p>
<p>However I would need to get a 3 mm rounding on the vertical axis, therefore I have added a quarter circular <em>eraser</em>.</p>
<p>Please see both of these in this shot:</p>
<p><a href="https://i.sstatic.net/WnLuv.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/WnLuv.png" alt="enter image description here" /></a></p>
<p>Now it's time to round the red one:</p>
<p><a href="https://i.sstatic.net/PT4i6.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/PT4i6.png" alt="enter image description here" /></a></p>
<p>Looks good from top-angle:</p>
<p><a href="https://i.sstatic.net/d2Kr4.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/d2Kr4.png" alt="enter image description here" /></a></p>
<p>But it's not rounded properly from other angles:</p>
<p><a href="https://i.sstatic.net/1M5IY.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/1M5IY.png" alt="enter image description here" /></a></p>
<p>I wish to maintain the 1 mm rounding on the whole edge, how can I do that?</p>
<p>I tried many things:</p>
<p>1.) Inverse ring eraser: almost good, but I would need 2 mm width, and 3 mm outer radius which is impossible (for a ring).</p>
<p><a href="https://i.sstatic.net/2TANn.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/2TANn.png" alt="enter image description here" /></a></p>
<p>2.) Inverse half sphere: not good, as it's not the shape I need</p>
<h2>Finally</h2>
<p>I succeeded with a &quot;hack&quot;: ring with 4 mm width and 6 mm radius, then scaled back to 50 %, making it 3 radius and 2 mm width. Then create variuos inverse-quarters from it (<em>eraser</em>) and tune them even further removing unnecessary halves:</p>
<p><a href="https://i.sstatic.net/9SMAZ.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/9SMAZ.png" alt="enter image description here" /></a></p>
<p>Using these erasers I could finally reach my goal:</p>
<p><a href="https://i.sstatic.net/lCilM.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/lCilM.png" alt="enter image description here" /></a></p>
<p>However this is super-tedious, is there a better software out (I'm sure it is), which can do this &quot;rounding&quot; effect on any object? Now I'm satisfied, but if I need to</p>
<ul>
<li>increase the height</li>
<li>change the size</li>
</ul>
<p>I'm screwed up: will have to &quot;slice&quot; this object to 3 pieces, increase the size of the middle, and then put them back together. Do this for every single axis. (= scale operation I'll need to slice this object to 9 pieces).</p>

<tinkercad>
How to maintain 1 mm rounding when I need 3 mm in a single axis?
Daniel
# How to maintain 1 mm rounding when I need 3 mm in a single axis?

(Asked by: username_0 on 2023-10-29)

I have planned a simple object in TinkerCAD from a *box* with radius set to 1 mm.

However I would need to get a 3 mm rounding on the vertical axis, therefore I have added a quarter circular *eraser*.

Please see both of these in this shot:

[![enter image description here](https://i.sstatic.net/WnLuv.png)](https://i.sstatic.net/WnLuv.png)

Now it's time to round the red one:

[![enter image description here](https://i.sstatic.net/PT4i6.png)](https://i.sstatic.net/PT4i6.png)

Looks good from top-angle:

[![enter image description here](https://i.sstatic.net/d2Kr4.png)](https://i.sstatic.net/d2Kr4.png)

But it's not rounded properly from other angles:

[![enter image description here](https://i.sstatic.net/1M5IY.png)](https://i.sstatic.net/1M5IY.png)

I wish to maintain the 1 mm rounding on the whole edge, how can I do that?

I tried many things:

1.) Inverse ring eraser: almost good, but I would need 2 mm width, and 3 mm outer radius which is impossible (for a ring).

[![enter image description here](https://i.sstatic.net/2TANn.png)](https://i.sstatic.net/2TANn.png)

2.) Inverse half sphere: not good, as it's not the shape I need

## Finally

I succeeded with a "hack": ring with 4 mm width and 6 mm radius, then scaled back to 50 %, making it 3 radius and 2 mm width. Then create variuos inverse-quarters from it (*eraser*) and tune them even further removing unnecessary halves:

[![enter image description here](https://i.sstatic.net/9SMAZ.png)](https://i.sstatic.net/9SMAZ.png)

Using these erasers I could finally reach my goal:

[![enter image description here](https://i.sstatic.net/lCilM.png)](https://i.sstatic.net/lCilM.png)

However this is super-tedious, is there a better software out (I'm sure it is), which can do this "rounding" effect on any object? Now I'm satisfied, but if I need to

* increase the height
* change the size

I'm screwed up: will have to "slice" this object to 3 pieces, increase the size of the middle, and then put them back together. Do this for every single axis. (= scale operation I'll need to slice this object to 9 pieces).

**Tags:** tinkercad

---

## 1 answers

### Answer by username_1 on 2023-10-29. Score: 1 | Accepted answer

TinkerCAD is a fine tool for simple designs, but when you need to fillet or chamfer corners, this involves too many actions where you cut out the parts to get the requested fillet/chamfer. It might be interesting to save time to move to a different design tool.

This geometry is recreated in a few minutes in e.g. Fusion360, considering this is a simple design, you need to change the order of the actions to fillet the object properly. Fillet the corners of the box prior to filetting the box itself:

[![enter image description here](https://i.sstatic.net/CF1Zd.png)](https://i.sstatic.net/CF1Zd.png)

[![enter image description here](https://i.sstatic.net/arheg.png)](https://i.sstatic.net/arheg.png)

[![enter image description here](https://i.sstatic.net/GeqIw.png)](https://i.sstatic.net/GeqIw.png)

In case the design is way more complex an alternative solution would be to join a cube in the corner and round that:

[![enter image description here](https://i.sstatic.net/phkT3.png)](https://i.sstatic.net/phkT3.png)

[![enter image description here](https://i.sstatic.net/7DFFa.png)](https://i.sstatic.net/7DFFa.png)

[![enter image description here](https://i.sstatic.net/05wMn.png)](https://i.sstatic.net/05wMn.png)

[![enter image description here](https://i.sstatic.net/jLnjE.png)](https://i.sstatic.net/jLnjE.png)


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