![]() The laserXtens is our innovative solution for strain measurement up to specimen break, and fully meets standard requirements ( ISO 6892-1, ASTM E8, as well as ISO 9513, and ASTM E83) for bars and rods. Strain at break can be determined automatically, without the need for tedious specimen markings or manual measurement after specimen remains are collected. It's robust mechanical construction allows it to measure continuous strain up to the point of specimen break. Through its mechanical design, it combines high resolution and high accuracy with very high robustness. The ZwickRoell makroXtens is the classic and proven solution for the tests on bars and rods. In most cases, standard-compliant strain measurement is performed using automatic contact or optical (non-contact) extensometers. ZwickRoell's parallel closing hydraulic specimen grips ensure perfect specimen clamping and positioning throughout the entire test, preventing the specimen from slipping. ZwickRoell therefore not only develops new specimen grips, but also new technologies that prevent premature failure of specimens caused by unwanted clamping effects. These systems also place high demands on specimen grips and clamping. Today, various customized ZwickRoell systems reaching as high as 5,000 kN are operating successfully. In tensile tests on bars and rods, the required tensile forces easily go up to ranges above 2,500 kN. The tolerances for strain rate control required by the standards (especially for closed-loop strain rate control) can be easily met with both the makroXtens and laserXtens extensometer. Since 2009, ISO 6892-1 and ASTM E8 allow the test speed to be automatically controlled and regulated by the strain rate. This places particular demands on specimen grips and clamping. Various customized ZwickRoell systems up to 5,000 kN are operating successfully. The required loads can easily exceed 2,500 kN. Sections of products can be used as specimens for testing if the cross-section of the product permits. Specimens are machined from the product and prepared for the tensile test in accordance with the product shape or as specified in the product standards. ISO 6892-1 is also a European standard (EN ISO 6892-1) and therefore also applicable in the European Union (for example, as DIN EN ISO 6892-1 in Germany). Tensile tests on bars and rods are usually performed according to ISO 6892-1 and ASTM E8, which are internationally recognized and widespread standards. Environmental protection and sustainability.Consultation and Application Technology.Specimen preparation and dimensional measurement. ![]() Extensometers for Compression, Flexure and Components Testing.Analog and Digital Hardness Testers to Shore.DuraScan micro and low-load hardness tester.Extrusion Plastometers / Melt Flow Index Testers.Testing Machine for Tubular Biomaterials.Biaxial Testing Machine for Biomaterials.Electromechanical Servo Testing Actuators.Testing machine for high test loads (E-series).Thermoplastics and thermosetting molding materials.
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