Portable Point Load Testing Machine : Portable instrument which can be used in both the laboratory or in situ to determine the rock strength index of rock samples or cores. The values required for the calculation of the rock strength index are failure load and distance between the conical points. Parameters: Max work pressure: 60Mpa Piston diameter: dia.35mm Piston area: 9.62cm2 Dimension: 380x300x620mm approx. weight: 85kg. approx.