Slider Crank Mechanism
Product Code : EL-AMLE-10636
Quick Answer: This apparatus demonstrates the crank mechanism – the functional group of machines that converts a uniformly rotating motion into a reciprocating motion, or vice versa – using an experimental unit comprising a crank disk, connecting rod, and cylinder, and can show this conversion with either a fixed or oscillating cylinder. The crank radius can be adjusted to three positions by changing the crank's position on the crank disk, while a millimetre-precise steel ruler attached to the cylinder measures the stroke and an angle scale integrated into the base plate lets students read the crank angle. Since crank mechanisms are used in real machines such as engines, pumps, and presses, the apparatus gives students a hands-on way to understand this fundamental motion-conversion principle.
The experimental unit comprises a crank disk, connecting rod and cylinder: the connecting rod is connected to the crank disk on one side via a crank, and at the other end is connected to the cylinder, which models the piston. Changing the position of the crank on the crank disk adjusts the crank radius in three positions. Simply turning a screw makes it possible to block the pivoting cylinder and, thus, to demonstrate a crank mechanism with either a fixed or oscillating cylinder.
The angle is adjusted using the crank disk, with an angle scale integrated into the base plate, and a millimetre-precise steel ruler is attached to the cylinder to measure the stroke. The elements are mounted on a base plate, and two handles make it easy to carry and stack the unit. Crank mechanisms are used in engines, pumps or presses.
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Last Updated: September 2026
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