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WP 500 Torsion Tester, 30Nm
Education / GUNT Hamburg / Engineering Mechanics and Machine Elements / Properties of Materials /

Using this experimental unit, metal test bars are twisted to destruction. The test torque and the angle of twist are recorded during this process. Test bars made of different materials with varying lengths are included. The test torque is applied manually using a hand wheel and a worm gear. Measurement is performed with a strain gauge torsion shaft, the deformation of which is compensated. The measurement can be read off directly in Nm on a digital display on the measuring amplifier.

  For adaption to different length specimens, the measurement jig can be slid along the stiff frame. The angle of twist is determined using a protractor and and a revolution counter. Commercially available 1/2" square drive sockets, 17mm across flats, are used as specimen holders.

Learning Objectives / Experiments

- Torsion tester for metallic test bars, loading to destruction of the specimens

- Effect of
  * specimen material
  * specimen cross-section
  * specimen length


[1] Experimental unit for testing metal torsion test bars under load until fracture

[2] Test torque manually applied using handwheel and worm gear

[3] Definition of input angle via hand wheel
[4] Measuring device slidable to fit various specimen lengths

[5] Test torque measuring using strain gauge measuring shaft and measuring amplifier

[6] Strain gauge measuring shaft with compensation for own deformation

[7] Electronic measuring amplifier with 6-digit torque display

[8] Measurement of angle of twist using revolution counter and protractors for input and output angle
[9] Specimen holders: 2x 17mm hex socket

Technical Data

Worm gear

- transmission ratio: 1:63
Revolution counter: 5 digits


- length: up to 750mm
- material: steel, aluminium, brass

Measuring ranges

- torque: 0...30Nm

- input and output angle: 0...360°


Dimensions and Weight
l x w x h: 1400x350x300mm
Weight: approx. 43kg
Required for Operation
230V , 50/60Hz, 1 phase or 120V, 60Hz, 1 phase
Scope of Delivery
1 torsion tester
2 sets of specimens (steel, brass, aluminium)
1 set of experiment instructions
Order Details
020.50000  WP 500  Torsion Tester, 30Nm