Quick Answer: The Torsion Apparatus Searle’s Type measures the modulus of rigidity of a rod or wire by the statical twisting method. A 150–200 mm torsion wheel turns against a 0–360° scale with a vernier reading to 0.1°.
Last updated: October 2026
Key Features
Cast iron base with two-pillar support frame
Torsion wheel 150–200 mm with circular scale
0–360° scale with vernier reading to 0.1°
Split-chuck collets grip the specimen
Takes cylindrical rods up to 5 mm diameter; brass and steel specimens
Technical Specifications
Specification
Value
Base and frame
Cast iron base, two-pillar steel frame
Torsion wheel
150–200 mm diameter, circular scale
Angle reading
0–360°, vernier to 0.1°
Clamping
Split-chuck collets
Specimens
Brass / steel, cylindrical rods up to 5 mm diameter
About This Product
One end of the specimen is held fixed while a known torque is applied to the other end through the wheel. The angle of twist read on the vernier for each torque gives the modulus of rigidity of the material.
Frequently Asked Questions
What size of specimen fits the Torsion Apparatus Searle’s Type?
It takes cylindrical rods up to 5 mm in diameter, held in split-chuck collets; brass and steel specimens are used.
