Servo-hydraulic load frames – HA series
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Materials testing Product Information Servo-hydraulic load frames – HA series HA 100 on air springs with hydraulic wedge-grips Drawing: HA load frame Application With the testing actuator mounted in the lower cross‐ head and the load cell on the upper crosshead, the HA range of load frames represents the classical servo-hy‐ draulic testing machine as used for determining material properties under fatigue loads, e.g. S-N test (fatigue test), fracture mechanics, LCF (low-cycle fatigue). The frames also feature extremely precise alignment; Description of operation The 2-column load frames are designed for materials testing under dynamic loading in a closed force-flow. The frame is supported on vibration-isolating leveling units The frame is supported on vibration-isolating level‐ ing units so that no appreciable forces are transmitted to the floor during normal operation. Where tests or op‐ erating conditions are critical in nature, the use of op‐ tionally available air-springs is advisable; these offer a mounting frequency of approximately 3 - 6 Hz. The performance of the testing system is enhanced by the especially high axial and lateral stiffness of the HA load frames, enabling higher frequencies and specimen deformations, while high lateral forces which may occur in compression and flexure tests can be absorbed with‐ out difficulty. following installation of the testing actuator and load cell, alignment accuracy is +0.1 mm per meter separa‐ tion; at distances below 350mm the offset is constant at 0.05mm. Plane-parallelity is equal to or better than 0.03 mm per 100 mm. All fixtures are flange-mounted with a centering spigot, eliminating the need for retrospective alignment of the load string. Features • 4 standard nominal ratings from 50 kN to 500 kN • testing actuator recessed into lower crosshead to keep piston-rod extension as short as possible • convenient working height • particularly suitable for integration of a high-tempera‐ ture heating device • hard-chromed columns for precise guidance of upper crosshead • hydraulic clamping and adjustment for easy position‐ ing of upper crosshead • integrated oil-sump for collecting minor leakage • safety housing to comply with CE Machinery D

Zwick Materials testing Zw/ck / RoellProduct Information Servo-hydraulic load frames - HA seriesTechnical data Dynamic nominal force Crosshead clamping Crosshead adjustment A - max. height of test frame AK - tilted dimension for installation B - max. width of test frame C - max. depth of test frame Di - column spacing E - column diameter F - height of top edge of lower crosshead2) G - max. test area height3) H - max. working test area height4) J - crosshead displacement range Weight5) Frame stiffness with crosshead separation 1000 mm Suitable for actuators with maximum stroke Item...

Zwick Materials testing Zw/ck / RoellProduct Information Servo-hydraulic load frames - HA seriesSafety device Aluminium profile section construction with Makrolon panels enclosing testing machine on all four sides, safety door at front, electrically monitored and interlocked. Description Item number Safety device for HA 50 / 100 - 500 mm extra height 036534 Safety device for HA 250 - 500 mm extra height 075872 Safety device for HA 500 - 500 mm extra height 075876 All data at ambient temperature. We reserve the right to make technical changes in the course of ongoing development.