Free Torsional Vibrations
Product Code : EL-TOMP-11404
Quick Answer: Free Torsional Vibrations is a vibration experiment in which a specimen rod, gripped in an adjustable chuck, carries a free rotor at its bottom end. A non-contacting sensor next to the rotor disc measures the amplitude of the rotational oscillations.
Last updated: October 2026
Key Features
- Back panel fixes to the Test Frame and holds two vertical runners
- Chuck on the runners grips the specimen rod at any position along its length
- Rotor at the bottom of the rod is free to rotate; a bushing keeps rotation on the rod axis and supports the rotor during setup
- Non-contacting sensor for negligible damping
- Selection of rods of different diameter included
- Back panel scale gives the effective rod length directly
Technical Specifications
| Specification | Value |
|---|---|
| Specimens | Rods of different diameter |
| Clamping | Chuck on two vertical runners, adjustable position |
| Sensor | Non-contacting, measures rotational oscillation amplitude |
| Length indication | Scale on back panel referenced to the bottom of the rod |
| Mounting | Back panel to the Test Frame |
About This Product
By changing the rod and moving the chuck, students see how rod diameter and effective length change the period of torsional oscillation. Their measured frequencies can be compared with values calculated from torsion theory for each rod. Educational Instrument can dispatch the Free Torsional Vibrations to laboratories in Malawi, Haiti, Mauritania, Malta, Costa Rica and South Korea.
Frequently Asked Questions
How is the effective length of the rod set?
The chuck can be moved along the runners, and a scale on the back panel referenced to the bottom of the rod shows the effective length directly.
Related: Theory of Machines Products, Free Vibrations Test Frame, Free Vibrations of Cantilever and Free and Forced Vibrations.
For a quotation on the Free Torsional Vibrations, contact Educational Instrument.
