This apparatus can be used for direct rapid shear tests

relexation rheological tests

fatigue shear test

single impulse test etc.

the movement of its shear box is automatically controlled by the step motor FBM-3D-009 of which the rare is divided into two ranges:1~90 and 110~360 circles per min

each being adjusted step by step. The adjustment of the shear displacement with precision up to ±0.01mm is reached by regulating distance between the two light-sensitive diodes. The shearing times within 1~9999 can be predetermined and displayed on digitrons one by one. If the shearing times are the same at the predetermined

shearing will stop automatically. Besides

the apparatus can be operated manually. In testing the shear displacement and the shear stresses are recorded automatically by means of the end instruments and the recording meter.