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HCT/HBT servohydraulic testing machine

For determination of torsional oscillation (tension/torsion) Download
  • Metals
  • Automotive
  • Medical
  • Academia
  • Construction materials
Test load
  • 10 kN - 250 kN
  • 250 - 1000 Nm
Type of test
  • Tensile incl. torsional oscillation
  • Compression incl. torsional oscillation

The testing machine for determination of torsional oscillation

The HCT and HBT series servohydraulic testing machines are used for the determination of torsional oscillation or tension/torsion tests.

These machines have a torsion testing actuator mounted on the upper crosshead. The HC and HB series variant can be used for combined tensile, compression and torsion loading. The optional T-slotted platform makes these machines very versatile. 

    The final element in our dynamic testing product portfolio is the manufacture of all the necessary accessories such as hydraulic power packs, servohydraulic testing actuators, or hydraulic distribution units. Our portfolio is constantly being expanded through a program of continuous development and inclusion of new products, allowing us to satisfy our customer’s most demanding quality requirements while continually improving the quality of our products.

    Advantages & Features

    Advantages & Features

    Advantages of the HCT
    Hydraulic power packs
    servohydraulic actuator
    Hydraulic connection unit


    The HCT series table-top model covers test loads up to 10 kN or 25 kN for servohydraulic oscillating torsion.

    • Testing actuator stroke 100 mm
    • Torque 250 Nm
    • Angle of rotation 100° (280° optional)

    The HBT series floor-standing model covers test loads up to 250 kN for servohydraulic oscillating torsion.

    • Testing actuator stroke 100 mm
    • Torque 1000 Nm
    • Angle 100°
    • Additional details upon request

    Advantages of the HCT

    • 2-column frame for dynamic tests up to 25kN / 250 Nm
    • hydraulic adjustment and manual clamping of upper crosshead
    • testing actuator installed in upper crosshead
    • suitable for combined linear/rotary drive at 10 kN /100 Nm and 25 kN / 250 Nm
    • torsionally stiff, backlash-free length-compensating coupling
    • hydrostatic-bearing, sealless linear actuator
    • hard-chromed T-slotted platform and columns for tests in corrosive media
    • safety housing to comply with CE Machinery Directive depending on application
    • option: hydraulic wedge grips for tensile/compression-torsion tests
    Hydraulic power pack 40 l/min without noise protection

    Hydraulic power packs

    The HP series power packs feature high operational reliability and long service life. All components are mounted on top of the oil tank for easy access.

    The self-priming radial-piston pump is driven by an asynchronous motor. The nine pistons are in hydrostatically balanced contact with the stroke ring. Flow rate is regulated by the stroke-ring eccentricity, which is adjusted via two control pistons located opposite each other. The pressurized oil is routed via a high-pressure filter and is then available to the appliance.A factory-set pressure relief valve prevents excessive increases in pressure.


    Testing actuator LH2500

    servohydraulic actuator

    ZwickRoell's servohydraulic testing actuators feature sturdy, robust construction and are used both in servohydraulic testing machines and as single testing actuators, for example on a clamping plate. When used in conjunction with a servo valve they enable complex loading sequences to be implemented with great accuracy.


    Distribution unit

    Hydraulic connection unit

    The hydraulic distribution unit is the electrically operated switching device in servohydraulic testing machines. It connects or disconnects the hydraulic pressure for a servohydraulic testing actuator or servohydraulic testing machine.A connecting valve is allocated to each consumer, allowing them to be switched independently of each other. The modular design enables addition of an extra switching manifold whenever required.


    Technical overview

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