TorqMaster International Manufacturers of Friction Hinges

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February 2003
Professional Engineering Publication
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Torque Calculator

Download the torque calculator here:
Torque Calculator.zip

The torque exerted by the display on the hinge at a particular angle is given by:

Torque = Weight x Distance from the Axis of Rotation to Center of Gravity x Cos of the Angle

If the weight of the display is evenly distributed, the distance from the axis of rotation to the center of gravity is equal to half the length of the display. (Example shown below)

Units:	English	Metric
Weight of Display:		lb or kg
Length of Display:		in or cm
Is the Weight Evenly Distributed?
Distance to CG:		in or cm
Angle of Display:		degrees
Torque:

Example:

The Angle of the Display = 45°

Weight of the Display = 2 lb.

Length of the Display = 10 in.

Distance to the Center of Gravity = 5 in. (Assuming weight is evenly distributed).

Hence the torque exerted by the display on the hinge at a 45° angle is:

Torque = (2 lb.)(5 in.)(Cos 45°) = 7.07 lb.in

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