HCT/HBT Servohydraulic Testing Machine for Determination of Torsional Oscillation (Tension/Torsion)

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.

Servohydraulic testing machine with torsion testing actuator for determining torsional oscillation (tension/torsion testing)

Determination of Torsional Oscillation up to 25 kN With the HCT Series 

The servohydraulic testing machine is equipped with a torsion testing actuator. 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)
HCT series servohydraulic testing machine for determination of torsional oscillation or tension/torsion testing.

Advantages & Features

  • 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

Technical Data

Test-area height

Standard

Extended 250 mm

Extended 500 mm

Dynamic nominal force

25

25

25

kN

AG100 – max. height of test frame

2310

2560

2810

mm

AK - tilted dimension for installation

1750

1995

2240

mm

B — max. width of test frame

660

660

660

mm

C – max. depth of test frame

500

500

500

mm

D1 - distance between columns

460

460

460

mm

E – column diameter

65

65

65

mm

F - height of top edge of lower crosshead

215

215

215

mm

G – max. test area height[1]

1000

1250

1500

mm

H – max. working test area height[2]

910

1160

1410

mm

J - Crosshead displacement range

600

600

600

mm

K - weight[3]

435

450

465

kg

Frame stiffness at 1000mm crosshead separation

300

300

300

kN/mm

T-slot connection dimensions

as per DIN 508 M10 x 12, spacing 80 mm
Ø 70 mm, 6 x M8 (only 6 bolts) and
Ø 115 mm, 4 x M8

Clamping/ adjustment: manual/hydraulic

935275 [4]

936110 [4]

936259 [4]

  1. Distance between upper and lower crossheads
  1. Distance between piston flange and base crosshead with piston retracted
  1. Weight with actuator unit
  1. Secure, stable mounting on support required; base 935284 recommended

Determination of Torsional Oscillation up to 250 kN With the HBT Series

The servohydraulic testing machine is equipped with a torsion testing actuator. 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
HBT series servohydraulic testing machine for determination of torsional oscillation or tension/torsion testing.

Servohydraulic Components

Description

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.

Hydraulic Power Packs

Hydraulic power pack 40 l/min without noise protection

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.

Servohydraulic Testing Actuator

Testing actuator LH2500
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. 

Hydraulic Distribution Unit

Distribution 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.

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