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LABORATORY VANE SHEAR APPARATUS (HAND OPERATED)IS: 2720 (Part XXX)- 1968.
Specifications: Consists of a torque head adjustable in height by means of a lead screw rotated by a drive wheel to enable the vane to be lowered into the specimen. Rotation of the vane is by means of a hand wheel which operates a worm gear arrangement turning the upper end of a calibrated torsion spring. Vane dia, rod dia, vane size & vane height are as per IS specifications.
The vane shaft is attached through the hollow upper shaft to a re-settable pointer, which indicates the angle of torque on a dial graduated in degrees. The dial reading multiplied by spring factor gives the torque. A container for soil sample is also supplied, and a sampling tube of 38mm I.D & 150mm long can also be used as container.
Supplied with set of four springs, one each of approx. 2kg.cm., 4kg.cm.and 8kg.cm. Complete as above in a wooden carrying case.
LABORATORY VANE SHEAR (MOTORISED)
Similar to above but electrically operated. Rate of rotation is 1/60r.p.m. Suitable for operation on 230 volts, single phase, 50 cycles, A.C. supply