The Auto shear is an automatic machine for direct/residual shear testing. It incorporates a high-resolution stepper motor fitted with a high precision load transfer mechanism.

The axial transmission of the horizontal force adopts a straight connection through shear box, shaft and load cell. This design avoids the load measurement inaccuracies occurring with the widely used "swan neck" basic design.

A high quality techno-polymeric material has been adopted for the carriage of the shear box, offering excellent resistance to corrosion, wear and tear and to the chemicals often mixed with the soil specimens.

Via the large 6" touch screen colour display the user can start, pause and stop the test, select the data-recording mode, view the readings and the diagrams during the test execution and carry out the transducers calibration (load cell and two displacement transducers).

Furthermore, this polymeric carriage is lightweight and easy to clean.

Load cell and displacement transducers, weight and shear box assembly.

Vertical load is applied directly to the specimen via a loading yoke and a weights holding arm which amplifies 10 times the applied value.

Load ring and dial gauge are also suitable for manual recording.

 Standard complete configuration is composed by: 

Autos hear 

Load cell 

Shear box

Set of Weight 

Vertical displacement transducer

Horizontal displacement transducer

Template for data processing.

Technical Specifications:

Maximum vertical load: 500 N or 5000 N using 10:1 cantilever loading device supplied with the machine

Maximum shear force: 5000 N

Maximum horizontal travel: 23 mm

Sample type and size: up to 100 mm square or round

Test speed: from 0.00001 to 15.00000 mm/min

Multi voltage: Multifrequency power supply 230 V, 50 Hz or 110 V, 60 Hz

Maximum number of  a shear cycles: 50

Overall dimensions: 1040 x 530 x 1200 mm (l x d x h)

Weight approx.: 60 kg.