Autocad Tutorial 11: 2d Chamfering and Filleting

A beginner’s guide on 2D chamfering and filleting.

So far we have been working using objects with sharp corners except for the circle and sphere. You may wonder how do people get those nice “rounded-off” or “cut-off” corners. Well they can achieve those nice corners by using the chamfer or fillet tools.

In this little setup I have 3 rectangles formed by 2D lines:

The first rectangle I’m going to leave it as it is. The second I will give a fillet and the 3rd I will apply a chamfer to it. The chamfer and fillet tools are located here under the “Modify” tab on the tools palette:

I’m going to start with the fillet tool. First I activate the fillet tool by clicking on it OR by typing “_fillet”. I now type in “R” to specify a radius for my fillet:

For the radius, I’ll make it 6 (There’s no specific reason for this):

I then click on the 2 lines joining at a corner (doesn’t matter which order). In this case it is the top right corner of the 2nd rectangle:

And now I have a fillet:

Here’s another picture to explain it:

Here I just filleted the other 3 corners of the rectangle. The top 2 corners of the rectangle have a 6 radius fillet and the bottom 2 have a 4 radius fillet. (NOTE: When I say something like 6 radius, the unit does not matter, it could be 6 centimetre radius, 6 metre radius or 6 kilometre radius, it doesn’t matter as AutoCAD doesn’t have units for these things and doesn’t need them. It is up to you to choose the units for yourself):

Now I’m going to move onto chamfer. First I activate the chamfer tool by clicking on it or by typing “_chamfer”. I then type in “a” for angle and press ENTER:

I now specify the distance from the edge of the line that will be chamfered; in this case I will enter 4 and press ENTER:

For the angle, I will enter 40 and press ENTER:

Now I click the 2 lines that join together at a corner to chamfer them. In this case it will be the top right corner of the 3rd rectangle. The FIRST line selected will be the top line of the rectangle and the second line will be the one to the right of it (it does make a difference):

And now I have a chamfered corner:

Here’s another picture to explain it a bit more:

Now I just chamfered the rest of the corners in the 3rd rectangle:

Now with the press pull tool, I’ve raised each one to a height of 5 and rendered it:

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