The Torsion Testing Machine is a compact machine, ideal for classroom demonstrations and for safe use by small groups of students. Its frame is a rigid, precision- engineered alloy box-section, supported at each end by adjustable feet. It carries two main parts:
• A ‘strain head’ at one end, and
• A torque reaction and measurement system at the other.
The specimens fit between the strain head and the torque reaction and measurement system. The strain head is a 60:1 worm drive reduction gearbox, mounted on a platform. The platform can be moved and locked to any point along the frame. To apply torque, students turn a handle at the input of the gearbox. A keyway allows the output shaft of the gearbox to slide freely along its length. This allows for any change in length of the specimen during the tests and for easy insertion of specimens.