What Is a Symmetric Relation in SolidWorks?

A symmetric relation in SolidWorks refers to a specific type of relationship between two or more entities or features in a 3D model. It is an essential concept that helps designers and engineers create balanced and symmetrical designs with ease.

Understanding Symmetry

Symmetry is a fundamental principle used in various fields, including art, architecture, and engineering. It refers to a balanced arrangement of elements or parts on opposite sides of an axis or plane. In the context of SolidWorks, symmetry plays a crucial role in creating aesthetically pleasing and functional models.

Defining Symmetric Relations

In SolidWorks, symmetric relations are used to establish a symmetrical relationship between two or more entities or features. This means that any changes made to one side of the model will automatically be reflected on the other side, ensuring perfect symmetry.

Example: Let’s say you have created a 3D model of a car’s body using SolidWorks. To ensure symmetry, you can define a symmetric relation between the left and right sides of the car’s body. Any modifications made to one side will automatically be applied to the other side, maintaining perfect symmetry throughout the design process.

Applying Symmetric Relations

In SolidWorks, applying symmetric relations is relatively straightforward:

  • Select the entities or features that you want to make symmetrical.
  • Right-click and select “Symmetry” from the context menu.
  • A dialog box will appear, allowing you to choose the axis or plane about which you want to establish symmetry.
  • Select the desired axis or plane and click “OK.”

Note: The axis or plane selected for establishing symmetry should be such that any modifications made on one side can be accurately mirrored on the other side.

Benefits of Using Symmetric Relations

Using symmetric relations in SolidWorks offers several advantages:

  • Time-saving: By establishing a symmetric relationship, you can save time by making changes to one side instead of modifying both sides individually.
  • Accuracy: Symmetric relations ensure that any modifications made are accurately mirrored on the opposite side, maintaining perfect symmetry throughout the design.
  • Aesthetics: Symmetry is visually pleasing and often desired in many designs. Using symmetric relations helps achieve balanced and harmonious models.


In conclusion, a symmetric relation in SolidWorks is a powerful tool that allows designers and engineers to create symmetrical models efficiently. By establishing a symmetrical relationship between entities or features, changes made on one side are automatically reflected on the other side, ensuring accuracy and saving time. Understanding and effectively using symmetric relations can greatly enhance the design process and result in aesthetically pleasing and functional models.