Quick Answer: The Torsion Pendulum finds the modulus of rigidity of a wire from the period of a disc twisting back and forth on it. The machined brass or iron disc is about 12.5 cm to 15 cm across and hangs from a centre-mounted wire held in a chuck.
Last updated: October 2026
Key Features
Machined circular brass or iron disc, about 12.5–15 cm diameter
Specimen wire mounted at the centre of the disc
Chuck-vice clamp holds the wire in line
Brass and powder-coated cast iron parts
Wall bracket or tripod base with levelling screws
Technical Specifications
Specification
Value
Disc
Brass or iron, approx. 12.5 cm to 15 cm diameter
Clamping
Chuck-vice
Suspension
Centre-mounted specimen wire
Materials
Brass and powder-coated cast iron
Support
Wall bracket or tripod base with levelling screws
About This Product
Twisting the disc and letting it go sets up angular simple harmonic motion. From the period of oscillation, the disc size and the wire dimensions, students calculate the modulus of rigidity of the wire material. Educational Instrument can dispatch the Torsion Pendulum to laboratories in South Sudan, Vanuatu, South Africa, Tajikistan and Antigua and Barbuda.
Frequently Asked Questions
How can the Torsion Pendulum be mounted?
It can be fixed on a wall bracket or stood on a tripod base, and both have levelling screws.
