Wave Motion Apparatus (18 Pulleys) STEM Lab Manufacturer,Supplier and Exporter in India
Product Code : SCL-EI-12544
Quick Answer: The Wave Motion Apparatus (18 Pulleys) is a hand-cranked transverse wave demonstrator in which 18 eccentric cams on one shaft lift 18 vertical rods tipped with coloured balls. Turning the crank sends a continuous wave along the row.
Last updated: October 2026
Key Features
- 18 eccentric pulleys (cams) set at offset angles along one shaft
- 18 vertical steel rods with high-visibility moulded balls
- Manual hand crank on low-friction bearings
- Powder-coated sheet steel base
- Crank speed controls frequency, so wave speed can be varied by hand
Technical Specifications
| Specification | Value |
|---|---|
| Mechanism | 18 sequentially offset eccentric cams |
| Indicators | 18 vertical steel rods with moulded balls |
| Drive | Manual hand crank with bearing support |
| Frame | Powder-coated sheet steel base |
| Wave type | Continuous transverse travelling wave |
| Dimensions (L x W x H) | Approx. 450 mm x 120 mm x 300 mm |
| Weight | Approx. 2.2 kg |
About This Product
Cranking slowly shows each rod rising and falling in place while the wave shape moves along, the defining feature of a transverse wave. Stopping the crank freezes the pattern so students can measure wavelength and amplitude with a ruler and pick out crests, troughs and phase differences, and cranking faster shows how frequency affects the wave.
Frequently Asked Questions
What makes the wave in the Wave Motion Apparatus?
Each of the 18 eccentric cams is set a little further round than its neighbour, so the rods resting on them rise and fall in sequence and form a travelling transverse wave.
Related: Electronic Instruments and Wave Motion Apparatus (24 Pulleys) STEM Lab.
For a quotation on the Wave Motion Apparatus (18 Pulleys) STEM Lab, contact Educational Instrument.
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