Hookes Coupling Apparatus
Product Code : EL-AMLE-10629
Quick Answer: The Hooke’s Coupling Apparatus is a universal joint shaft setup that demonstrates how a universal joint combines two non-aligned shafts to transfer torque and rotational motion. Because a single universal joint transmits torque and speed non-uniformly, an effect called the gimbal error, the apparatus uses two universal joints linked by an intermediate shaft, also called a cardan shaft or universal joint shaft, to study and correct it; a universal joint is also known as Hooke’s coupling. The setup is mounted on a base plate with two rotary disks and two carrying handles, letting students compare the drive-side input angle with the driven-side output angle to determine the gimbal error.
Universal joint shafts are joint shafts that transfer a torque and a rotational motion, and a universal joint combines two non-aligned shafts. In a universal joint, the torque and the speed are non-uniformly transmitted, and this non-uniform transmission is called the gimbal error. This is remedied by using two universal joints connected to each other by an intermediate shaft, a combination referred to as the cardan shaft or the universal joint shaft.
The experimental unit comprises two universal joints with intermediate shafts, and the arrangement of the universal joints and the deflection angle can be set using two rotary disks on the base plate. On the drive side, the input angle is set and read by the drive universal joint, and the intermediate shaft transmits the torque to the driven universal joint, where the output rotation angle is read. The gimbal error is determined from the difference between the two angles.
The elements are mounted on a base plate, and two handles make it easy to carry the unit, which can be used to study a universal joint shaft.
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Last Updated: September 2026
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