Direct/Shear, Pneumatic, Standard Version

This direct shear utilizes a pneumatic loading concept for applying the vertical load to the sample. The table top model uses two pneumatic pistons and eliminates the need for numerous weights used in dead weight systems. A small piston applies loads from 4 lbs to 100 lb (1.8 to 45 kg). A larger piston applies loads up to 1,500 lb (680 kg). Vertical load is applied by setting precision regulator to a required pressure per the calibration chart. Two decimal place readout is accurate to 0.25%. All models have built-in pressure and load readouts used for setting vertical load and measuring shear forces.</p>
 

Motor drive controls strain rate within 1% and is easily set with digital thumbwheels. Each digit represents 0.0001 in/min (.00254 mm/min) strain rate and can be controlled from 0.0001 in to 0.3 in/min (.00254 to 7.62 mm

CONSTRUCTION

The direct shear has a 1.25 in (31.7 mm) thick solid base for the vertical and horizontal loading. Shear box assembly is mounted on a steel cabinet. The shear rings and water chamber are corrosion resistant anodized aluminum.

SPECIFICATIONS

Strain rate is 0.0001 in to 0.3 in/min (.00254 to 0.162 mm/min). Horizontal movement is 0.8 in (20.3 mm). OD are 14.5 in D, 30 in L, 22 in H (368 x 762 x 559 mm). Electrical requirements 110V, 60Hz, 1Ph. Net Wt. 190 lb (86 kg).

If a digital version is wanted, see LA-3731-01

For data transfer version, along with LA-3731, order the optional LA-3732-01 4-channel digital.

Meets ASTM D3080, AASHTO T236, BS-1377 BS 1377:7.