Hide Table of Contents

Blocks in Parts and Assemblies

You create blocks from single or multiple sketch entities. Blocks enable you to:

  • Create layout sketches using a minimum of dimensions and relations.

  • Freeze a subset of entities in a sketch to manipulate as a single entity.

  • Manage complex sketches.

  • Edit all instances of a block simultaneously.

You can also use blocks in drawings to save drawing items such as standard notes, label positions, etc.



  • Display and design mechanical devices

Sketch layouts using relations between blocks to create motion with mechanical devices such as cranes.

 See Layout-based Assembly Design.


  • Outline system representations

Arranging components using blocks as simplified representations of components.


  • Make Block . Convert sketch entities to blocks. A Block is identified by under the relevant sketch in the FeatureManager design tree.

  • Edit Block :

    • Add or remove sketch entities.

    • Change dimensions and relations.

You can add relations between sketch entities within the same block, but not to external sketch entities.

  • Insert Block . Create multiple instances of existing blocks or browse for blocks to retrieve blocks in parts, assemblies, or blocks.

  • Add/Remove . Adds or removes sketch entities from a block.

  • Rebuild . Rebuilds and updates parent sketches by the block.

  • Save Block . Saves and adds an .sldblk extension.

 Exploding one instance of a block only affects that instance of the block.

  • Belt/Chain . Creates continuous tangent lines and arcs to represent the belt or chain path.


  • Create blocks using 2D sketches or 2D sketches on 3D sketch planes.

  • Combine imported 2D blocks with 2D sketches created on 3D sketch planes.

  • Import blocks saved in 2D into a 3D sketch.

  • Pre- or post-select entities to include in the block.

  • Select blocks to view existing relations, add new relations, etc.

  • Mirror, scale, or pattern blocks.

  • Add a Traction relation to create relative rotation constraints between blocks.

  • Create nested blocks (blocks within blocks).

  • Convert or offset entities from within the same block.

  • Convert entities from another block.

If you use another block with convert entities, the resulting geometry is not associative to the original geometry.

  • Sketch new entities while editing a block to create relations between the new sketch entities and the block you are editing.

  • Copy and paste between sketches and drawings.


Provide feedback on this topic

SOLIDWORKS welcomes your feedback concerning the presentation, accuracy, and thoroughness of the documentation. Use the form below to send your comments and suggestions about this topic directly to our documentation team. The documentation team cannot answer technical support questions. Click here for information about technical support.

* Required

Subject:   Feedback on Help Topics
Page:   Blocks in Parts and Assemblies
*   I acknowledge I have read and I hereby accept the privacy policy under which my Personal Data will be used by Dassault Systèmes

Print Topic

Select the scope of content to print:


We have detected you are using a browser version older than Internet Explorer 7. For optimized display, we suggest upgrading your browser to Internet Explorer 7 or newer.

 Never show this message again

Web Help Content Version: SOLIDWORKS 2011 SP05

To disable Web help from within SOLIDWORKS and use local help instead, click Help > Use SOLIDWORKS Web Help.

To report problems encountered with the Web help interface and search, contact your local support representative. To provide feedback on individual help topics, use the “Feedback on this topic” link on the individual topic page.