Your supplier of high pressure laboratory instruments

Your supplier of high pressure laboratory instruments

THC-series Triaxial Hoek cell


The Hoek Cell is designed for use in triaxial compression tests that provide vital data on rock strength and elasticity, including variables such as shear strength under varying confining pressures, internal friction angle, cohesion intercept, and Young's modulus. This versatile cell can be customized to hold samples with diameters ranging from 21.5 mm to 63.5 mm (HQ). In the testing setup, the rock specimen is positioned between two mobile loading pistons and subjected to compression via a load frame. A specialized sleeve ensures that the sample remains isolated from the hydraulic confining fluid. The Hoek Cell consists of a hollow steel cylinder with screw-on end caps, two high-resistance spherically seated loading pistons, and a protective sleeve. The cylinder features two self-sealing couplings: one for linking to the hydraulic pressure system and another for venting air from the cell chamber. For enhanced data capture, the cell can be optionally fitted with integrated strain gauges, allowing for detailed analysis of the failure envelope in addition to the aforementioned rock properties.



ASTM (D7012)

Maximum confining pressure

70 MPa (10,000 psi)

Loading length

400 mm

specimen diameter

up to 63.5 mm (HQ)

Specimen length

twice the diameter

Wetted part material

Stainless steel

Pore port

1/8 inch

Confining port

3/8 inch


Easy to operate

Models available for different specimen sizes

High pressure capability


Download Hoek cell brochure.pdf

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