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Materials Testing Systems

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Designed and marketed by HMA-Geotechnical Systems Australia P/L, the Point Load Tester is a portable instrument used for the evaluation of the strength of rock specimens.  This test can measure the Point Load Strength (Is) and the Strength Anisotropy Index (Ia) which is the ratio of Point Load Strength in the directions which give the greatest and least values.

Diametrical and axial tests are performed on core samples, while block and irregular lump tests may be done on prepared and unprepared samples respectively.  The specimen is fractured by applying load through a pair of uniaxial, conical platens.

If necessary, size corrections may be applied to core specimens to yield the standard Is(50) value for a 50mm diameter core.  Correlations between Is(50) values and the Unconfined Compressive Strength are documented elsewhere in open literature.


The instrument is based on a two column anodised aluminium and stainless steel loading frame to minimise size and weight yet maintain stiffness and load capacity.

Load is applied through a hand operated hydraulic jack mounted on the lower reaction plate. The travel of the bottom platen is guided by close tolerance bushes on the guide shafts while platen separation is measured by a sliding scale with an adjustable datum.   The platen points contain hardened steel balls to provide a true 5mm radius.  Applied load is measured via a strain-gauged upper point and displayed on an intelligent liquid crystal display.  This display also allows the operator to select the Point Load Tester functions through its front panel keys.  Alternatively a computer can run a custom software package to record test data.  Peak test values are shown on both the local display and the computer monitor.

A battery life of at least fifteen hours ensures prolonged field or laboratory testing and the frame can be run with mains power connected if available.  A transparent safety screen protects the operator from rock fragments during the test.  The testing frame can be used by holding the lifting handle while loading the sample however it should be anchored to a suitable mounting base with the tapped holes below the base of the jack.



Manufactured for CADEANCO by Fenixx Australia P/L, the hollow load cell enables direct measurement of axial loads in both conventional  bolts and cable strand roof support members.  The integral spherical set minimises errors induced by axial loading and gives reliable measurement over a range of collar conditions.



Many laboratory applications require the evaluation of sample deformation under varying load conditions.

CADEANCO can design and manufacture a custom measurement system for your application.  Our basic designs employ both strain gauge transducers and commercial linear potentiometer and LVDT sensors for the measurement of diametrical, circumferential and axial strain in samples.  These sensors can be linked to a purpose built signal conditioning and readout  to provide sensor data output in almost any specified format.

We are happy to discuss and advise on your application and follow the project through the design, manufacturing, installation and commissioning stages to provide a turn-key solution to your problem.