Gehman Torsion Testing Machine

Gehman Torsion Testing Machine
A specialized testing instrument designed to evaluate the low-temperature torsional properties of rubber, elastomers, and flexible polymers—key for assessing material performance in cold environments. Following the Gehman method, this machine measures the torque required to twist samples at controlled low temperatures, providing critical data on flexibility, stiffness, and brittleness under cold conditions.
Equipped with a precision temperature-controlled chamber (capable of reaching -70°C or lower), a high-sensitivity torque sensor, and a motorized twisting mechanism, the tester operates through:
Cooling samples to target low temperatures (e.g., -40°C, -60°C) and maintaining thermal stability.
Twisting samples at a standardized rate (typically 360° per minute) while recording torque values at specific angular displacements.
Analyzing key metrics: torsional modulus (stiffness), torque at fracture, and the temperature threshold for brittleness.
Ideal for materials used in:
Automotive & Aerospace: Rubber seals, gaskets, and hoses exposed to cold climates or refrigerated systems.
Cold-Weather Applications: Elastomers in winter tires, cold-resistant footwear, and cryogenic equipment.
Industrial Polymers: Flexible plastic components in outdoor machinery, cold-chain logistics, and freezing environments.
Compliant with international standards such as ASTM D1043, ISO 815, and DIN 53529, this machine is trusted by rubber manufacturers, material suppliers, and quality control labs. It ensures materials retain flexibility and functionality in low-temperature settings, reducing the risk of failures in critical applications.