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MechanicalMay 9, 2026|3 min read

Torque

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

Definition

Torque is the turning effect of a force around an axis.

Why it matters

It is a core value in bolt tightening, shaft design, and power transmission.

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.

Basic expression

Torque = Force x radius

Example

A 10 N force applied at a 2 m arm creates 20 N m of torque.

Formulas

Basic expression
Torque = Force x radius