A bench-mounted machine to allow students to conduct torsion tests on different materials. 

• Direct readings of torque and strain on digital displays 
• Forward and reverse loading 
• For use with specimens up to 750 mm long 
• Wide range of test specimens 
• To Include a Gearbox Strain Head and a Torque Measurement Head, mounted on a precision engineered sturdy box-section alloy base with adjustable feet 
• Gearbox to be a 60:1 ratio sealed gear and worm drive unit, capable of being moved and locked to any point along the frame 
• Torque to be applied by turning the handle of the gearbox 
• The Torque Measurement Head to have a moment arm and an industrial force sensor (strain-gauged load cell) 
• The torque shaft to be supported by bearings 
• The load cell must be able to connect to suitable data acquisition system 
• Maximum Torque 30 Nm 
• Angular Strain Measurement to be via Electronic Encoder and Digital Display 
• A clear removable guard to cover the specimen area for safety 
• To include a 12 V DC Digital Load Meter, range 30 Nm, and a 12 V DC Digital Angle meter, range greater than 10,000 degrees 
• The Digital Angle Meter to display down to 0.01 degrees. If the VDAS Data Acquisition is used, the Angle to be displayed In radians with a resolution of 0.0001 
• Maximum specimen length: 750 mm 
• To be supplied with 2 sets of Drive Sockets – 3/16"
• Whitworth and 12 mm AF hexagonal (Qty 2 each)
• To be compatible with a Versatile Data Acquisition System (VDAS) 
• Nett Dimensions and Weight: 1100 mm long x 400 mm depth x 350 mm height, 25kg 
• Packed Dimensions and Weight: 0.3 m3, 60 kg 

Experiments 

• Determination of modulus of rigidity (shear modulus) and yield strength (when used with the optional torsiometer) 
• Determination of upper and lower yield stresses for normalised steel specimens
• Reversed torsion tests to demonstrate the Bauschinger effect and the effects of residual body and textural stresses on torsional strength