How to Link Dimensions in SOLIDWORKS

Linked dimensions in SOLIDWORKS let multiple dimensions share the same value. This is useful when repeated features, sketch entities, or design details should update together from one controlling value.

When linked dimensions help

Use linked dimensions when several values should always stay equal. Examples include matching slot widths, repeated offsets, common hole spacing, or consistent wall thickness in related sketches.

If dimensions only happen to be the same today but may change independently later, avoid linking them. A linked value should represent real design intent.

This distinction matters in production models. A careless link can make a later design change affect unrelated geometry and create a subtle mistake.

Create a linked dimension

Select or create the dimension, then use the link value workflow to give it a shared name. Apply the same linked value name to other dimensions that should match it.

Use a clear name for the linked value. A name such as slot_width or plate_offset is easier to understand than a generic name that gives no design context.

Use consistent naming if the model has many linked values. Short descriptive names make the equation and dimension dialogs much easier to review.

Edit linked values

When you change one linked dimension, the other dimensions using that linked value update with it. Rebuild the model after changes and check the related features.

Linked dimensions can save time, but they can also cause unexpected updates if the relationship is not obvious. Review the feature tree and sketch names when troubleshooting.

If several sketches use the same linked value, update the model one step at a time and rebuild. This helps catch a feature that no longer works with the new shared dimension.

Use equations for more control

Linked dimensions are best for equal values. If a dimension needs to be a formula, ratio, or offset from another value, equations or global variables may be a better choice.

For example, a tab width may equal half a plate width, or a clearance may equal a nominal size plus a tolerance. Those relationships are clearer when written as equations.

Global variables are also better when the value represents a design standard such as material thickness, clearance, or common spacing used across several features.

Check drawings and configurations

If linked dimensions affect released geometry, confirm that drawings update correctly. Also check configurations if the part uses them, because configuration-specific dimensions can behave differently than global linked values.

Use linked dimensions carefully in files shared with other designers. Clear names and simple relationships make the model easier to maintain.

When a drawing shows linked geometry, check that the drawing dimensions still communicate the correct design requirement. The drawing reader does not see the linked-value relationship inside the model.

Troubleshooting

If a dimension changes unexpectedly, check whether it is linked to another value. If a linked value should no longer control a dimension, unlink it and assign an independent value.

Before release, rebuild the model and confirm that all linked dimensions still represent the intended design relationship. Linked values should make edits safer, not hide important dependencies.

When a model becomes hard to understand, replace vague linked values with better names or move more complex logic into equations and global variables.

For released models, keep linked dimensions limited to relationships that are easy to defend. If a dimension affects fit, clearance, or tooling, make sure the link supports that requirement instead of hiding it.