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Wave Motion Apparatus (24 Pulleys) STEM Lab

Wave Motion Apparatus (24 Pulleys) STEM Lab

Product Code : SCL-EI-12545

Quick Answer: The Wave Motion Apparatus (24 Pulleys) STEM Lab is a hand-cranked wave machine in which 24 eccentric cams, each offset by 15°, drive 24 steel rods with coloured spheres up and down to show a travelling transverse wave.

Last updated: October 2026

Key Features

  • 24 eccentric cams on a steel crankshaft, offset 15° from one another
  • 24 polished steel guide rods with high-visibility polymer spheres
  • Manual hand crank on low-friction bearings
  • Powder-coated sheet metal base frame
  • Approx. 580 mm x 130 mm x 320 mm, about 2.95 kg

Technical Specifications

SpecificationValue
Cams24 eccentric cams, 15° phase division
Rods24 steel guide rods with polymer spheres
DriveManual hand crank, low-friction bearings
BasePowder-coated sheet metal frame
Dimensions (L x W x H)Approx. 580 mm x 130 mm x 320 mm
WeightApprox. 2.95 kg

About This Product

Turning the crank moves each sphere in simple harmonic motion, a little behind its neighbour, so a sine wave appears to run along the row while each sphere only goes up and down. Because the 24 steps of 15° add up to one full turn, one complete wavelength is shown, and students can point out crests, troughs, amplitude and phase, and see how cranking faster raises the frequency.

Frequently Asked Questions

Why are the cams of the Wave Motion Apparatus (24 Pulleys) STEM Lab offset by 15°?

Each cam is 15° ahead of the next, so the 24 cams together cover one full cycle and the spheres trace one complete wavelength.

Related: Electronic Instruments and Wave Motion Apparatus (18 Pulleys) STEM Lab.

For a quotation on the Wave Motion Apparatus (24 Pulleys) STEM Lab, contact Educational Instrument.

   
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