1. Use: Measuring direct/residual shear strength of soils
2. This apparatus is of robust construction, equipped with an advanced, electromechanical operating device comprising a stepper motor, a precision made reduction unit and final worm screw with reduced play.
3. These devices are designed to obtain linear, micrometrical movements at constant speed and, independently from force developed, fast reverse drive.
4. Noise levels are virtually imperceptible and no maintenance is required.
5. Continual drive speed in either direction can be varied via the electronic control unit from 0.00001 to 9.9999999 mm/minute.
6. RS232 Interface for PC.
7. Graphic display.
8. The number of cycles, forward/reverse speeds and displacement for the measurement of residual shear may also be programmed.
9. Instructions for use are provided in sequence on the display unit and data are input directly via the alphanumeric keypad.
10. Also provided are separate buttons for rapid approach
11. Electronic Control console: It consists of: numeric pad contains DEL, ENTER, Decima point, Function keys( Forward, reverse..etc) LCD display , LED indicators, Start/Stop keys.

Technical Specifications: 

1. Max. force forward/reverse: 6 kN
2. Speed range: 0.00001 to 50mm/minute
3. Different speeds may be selected for forward and reverse drive
4. Speed/load limitations: none - Displacement movements: 0,03 µm 
5. Rapid approach speed (unloaded): 12 mm/min.
6. Forward/reverse cycles: programmable up to 20 mm
7. Number of cycles: no limit to number which may be programmed
8. Micro switches prevent piston over travel and dynamometer overload
9. Leverage system allows applied weights to be amplified by 10, 9, 7.92 and 6.125
10. A small hand wheel serves to sustain/release the vertical load
11. Supports are provided for transducers, dial gauges and dynamometers.
12. Dimensions (packed): 1100 x 700 x 1250 mm (h)
13. Weight (packed): 140 kg. Accessories:
14. Shear Box 6x6cm made of brass
15. Sample cutter 6x6cm
16. Shear Box 6.77cm dia. made of brass
17. Sample cutter6.77cm dia.
18. Shear Box 6.35cm dia. made of brass
19. Sample cutter6.35cm dia.
20. Shear Box 10x10cm made of brass
21. Sample cutter 10x10cm
22. 6KN proving Ring complete with dial gauge
23. 5mm travel – 0.001 sensitivity
24. Dial gauge 10mm travel – 0.01 sensitivity
25. Dial gauge 25mm travel – 0.01 sensitivity
26. Calibrated Weight 1Kg x 4
27. Calibrated Weight 4Kg x 5
28. Poros plates 6x6cm (set of 2) made of silicon carbide
29. Poros plates 10x10cm (set of 2) made of silicon carbide
30. Poros plates 6.35cm dia (set of 2) made of silicon carbide
31. Poros plates 6.35cm dia (set of 2) made of Sintered Bronze

Extra accessories:

1. Poros plates 6x6cm (set of 2) made of silicon carbide
2. Poros plates 10x10cm (set of 2) made of silicon carbide
3. Poros plates 6.35cm dia (set of 2) made of silicon carbide
4. Poros plates 6.35cm dia (set of 2) made of Sintered Bronze