SERVICE FOR MACHINERIES IN MATERIAL TESTING LABORATORY CIVIL DEPARTMENT

SERVICE FOR MACHINERIES IN MATERIAL TESTING LABORATORY – CIVIL DPARTMENT

TORSION TESTING MACHINE : Maximum Torque Capacity - 60 Nm Torque Ranges – 60 Nm and 30 Nm No. of Divisions on Dial – 600 No Torsion Speed – 1.5 rpm Clearance between grips – 0-420 mm Grips for Flat Specimens width – 125 mm Motor – 0.5 HP, Power supply – 400 – 440 V 3 phase, 50 Hz Accuracy of torque indication : +1 % of the true torque Make – FIE. Faults in the equipment : 1. Grips holding the specimen should be changed. 2. Analog display showing the torsion reading increases. 3. Suddenly with torque applied, so it must be calibrated.

DIRECT SHEAR TESTING MACHINE : Ref. Standards IS:2720 (Part 13), BS 1377, ASTM D 3080 The Direct Shear test is carried out with an apparatus consisting of a square divided into two halves. The specimen, contained in the box, is subjected to a constant normal load while an increasing horizontal force is applied to one of the sections of the shear box. This force Causes a shear failure along the junction between the box sections. The shear force and the normal load are measured directly. The rate of strain is adjusted by the speed of the horizontal force applied. The loading unit has V-strips on which the shear box housing rests. Suitable for specimens of size 60×60×25mm. The recalibrated load yoke helps counter balance the Loading system. The load yoke with direct and through lever system for applying normal load up to 3 kg/cm, capacity, fixtures for proving ring, brackets for holding consolidation and strain dial gauges are provided. The lead screw connected to the shear box housing helps Application of shear stress. Suitable for operation on 220V, 50Hz, Single phase, AC Supply. Ref. Standards IS:11229, 2720 (Part 13)Type of Shear: Direct / Residual Measurement. Faults in the equipment : 1. Wires connecting to the motor need to be changed. 2. The piece connecting the shear box and proving Ring [U-shaped piece]Need to be changed.