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DesignMay 9, 2026|3 min read

Tolerance

Tolerance is a core engineering term. Definition, usage notes, and a practical example.

Definition

Tolerance is the acceptable variation range of a dimension.

Why it matters

It directly affects manufacturability, assembly clearance, and cost.

How it is used

In a design check, first define the relevant load, dimension, material, or flow condition. Then interpret this term by its role in the formula and compare it with limits.

Example

A 25.00 plus minus 0.02 mm dimension has a total tolerance range of 0.04 mm.

Formulas

No formulas added for this term.