How to Mirror in Fusion 360

This tutorial shows you how to use the Mirror tool to mirror a sketch, body, component, feature, or mesh in Fusion 360.

Mirroring saves you time and effort by reducing the number of features or bodies that you will need to create and copy.

Mirror Sketches

To mirror sketches in Fusion 360, you must have an active sketch open. You’ll need a line or construction line in your sketch that will act as the mirror line.

Mirrored sketch objects automatically update when you make changes on one side, saving you valuable time and making it easy to create symmetrical objects.

To mirror a sketch:

1. Select the sketch geometry you want to mirror.
2. Drop-down the CREATE menu > click Mirror.
3. In the Mirror dialog box, click Mirror Line.
4. Select the line to mirror the selected geometry across.
5. Click OK.

You can also use constraints and dimensions to control the position and size of the mirrored geometry.

Learn how to sketch in Fusion 360

Mirror Objects

To mirror bodies in Fusion 360, you must have one or more solid or face bodies in your model. You’ll need a plane or face that will act as the mirror plane.

To mirror a body or component in Fusion 360:

1. Drop-down the CREATE menu > click Mirror.
2. Set the Pattern Type to Bodies or Components.
3. Select the body or component you want to mirror.
4. Click the Mirror Plane button.
5. Select the plane along which you want to mirror the object.
6. Click OK.

Note the difference between mirroring and flipping. Mirroring creates a symmetrical copy of an object along a specified plane, while flipping refers to changing the orientation of an object without creating a copy.

Learn how to move and copy in Fusion 360

Mirror Features

A feature is any operation that modifies a body, such as extrude, revolve, fillet, chamfer, etc. You’ll need a plane or a planar face that will act as the mirror plane.

To mirror features in Fusion 360:

1. Drop-down the CREATE menu > click Mirror.
2. Set the Pattern Type to Features.
3. Select a compute option for the mirrored features.
4. Click OK.

These are the compute options you can choose from:

1- Optimized: Creates identical copies of features by patterning feature faces. (Fastest)

2- Identical: Creates identical copies of features by replicating the results of the original features.

3- Adjust: Creates potentially different copies of features by patterning features and calculating the extent or termination of each occurrence individually. (Slowest)

Mirror Mesh

To mirror a mesh, create a component from the mesh and then mirror the component.

Fusion 360 gives you precise control over mirroring and rotating objects by using planes, faces, or lines as reference points.