Controls Group Ring shear machine - TORSHEAR EmS Ring shear machine - TORSHEAR EmS
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Mecánica de Suelos

Ring shear machine - TORSHEAR EmS

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ASTM D6467 | BS 1377:7
  • Fully automatic standalone ring shear soil testing system for performing torsional ring shear test in drained condition to determine the residual shear strength of cohesive soil.
  • Managed by local user interface with 6” touch screen high resolution color display
  • Environmentally friendly and quiet with brand new Electromechanical Servoactuation (EmS) technology
  • Lightweight and compact, Torshear EmS can be placed on a standard bench. Maximizes use of space in your laboratory.
  • Smart and easy-to-use with removable load cells and displacement transducers. Simplifies testing, maintenance and calibration.
  • High-performing: Maximum vertical stress 1,200 kPa; Maximum shear stress 1,000 kPa
  • Infinite variable speed from 0.00001 to 1000°/min, with pre-shearing stage selectable and adjustable number of cycles of shearing.
  • Lightweight and easy to clean. Top-quality techno-polymeric materials offer excellent resistance to corrosion, wear and tear and to chemicals often mixed with soil specimens.
Torshear EmS is a versatile and fully automatic ring shear testing machine that benefits from the new low maintenance, efficient and environmentally-friendly Electromechanical Servoactuation (EmS) technology.
Ring shear test description
The test provides a procedure for performing a torsional ring shear test under a drained condition to determine the fully softened shear strength and nonlinear strength envelope of cohesive soils.
The fully softened strength is used to evaluate the stability of slopes that do not have a pre-existing shear surface. The fully softened shear strength also corresponds to the peak shear strength of a normally consolidated specimen. This test method focuses on the use of a reconstituted specimen to measure the fully softened strength.
This test is performed by shearing a normally consolidated, reconstituted specimen at a controlled displacement rate until the peak shear resistance has been obtained.
Fully automatic
The TORSHEAR EmS can complete the whole test from consolidation to shear stage automatically; selecting the load (stress) for consolidation and a pre-defined shear speed for shearing stage offering a practical and accurate way to obtain reliable results without any need for manual intervention, reducing the risk of human error.
Complete stand-alone system
Total control of a single unit, including full test execution is achieved without the need of a PC. The user interface is based on a large 6” touchscreen color display permitting to start, pause and stop the test, choose the data recording mode, show the readings during the test execution and carry out the transducers calibration.
It comes supplied with a USB pen drive allowing unlimited storage, TXT format data output.
Clarity in results
  • Test results are saved and displayed in real-time, speeding data capture.
  • Results are then processed using Wykeham Farrance (WF)’s easy-to-use Geo-Analysis templates, written by experts around international standards allowing you to concentrate on analyzing your materials; not on programing your testing machine.
Stainless steel shear boxes  
  • 40 cm2 stainless steel ring shear box fitted with easily removable sintered porous stone.
Ensuring complete application of torsional force
  • Sintered porous stone with special pattern design guarantees torsional shear force application.

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Especificaciones Técnicas

Maximum vertical stress: 1,200 kPa
Maximum shear stress: 1,000 kPa
Test Speed: from 0.00001 to 1000°/min
Specimen dimensions: Internal dia. 70 mm external dia. 100 mm
Sample area: 40 cm2
Sample thickness: 5 mm (various thickness available on request)
Weight approx.: 60 kg

Información para Pedidos

27-WF22E02 TORSHEAR EmS – Electromechanical Servoactuation technology, ring shear testing machine. 220-100 V / 50-60 Hz / 1 PH           


Software for PC Control 
27-WF22E02/SW  Torshear EmS software activation code. For remote PC control and data aquisition from Torshear EmS  (27-WF22E02), multiple units connectable to a single PC.

Data processing templates
30-WF6016/T3 Ring Residual Shear Geo-Analysis template conforming to BS 1377:7
30-WF6016/T16 Ring Residual Shear Geo-Analysis template conforming to ASTM D6467


Sintered porous stone with special pattern design guaranteeing application of torsional force