SPECIMEN GRIPS
At STEP Lab, we offer a wide assortment of jaws, grips and clamps for testing materials and products. We have specially designed a wide selection of these instruments, including clamps and compression plates, to meet the specific requirements of each application, load and test material.
Type of test
- Each test requires a specimen holding device. Only if the gripping and/or testing devices function correctly, safe and reliable testing is possible. For this, it is necessary to choose the right clamp for each test.
- With our wide range of jaws and testing devices, at STEP Lab, we cover a wide range of applications for tensile, compression, bending, shear and cyclic testing.
Specimen shape
- Due to their varied design and function, the grippers are suitable for different shapes, sizes and materials of specimens and deformation loads and ranges.
- The specific properties of different materials such as hardness, strength, ductility, elasticity and the type of surface are a key factor in selecting the right grip.
National standards
- Standard specifications as well as general testing requirements play an important role in the selection. For example, with high specimen throughput, the automatic application of clamping force, as provided by pneumatic and hydraulic grippers, is required.
- If several types of tests are to be performed, the grips should have a high degree of flexibility. This reduces grapple change times and related costs, thereby increasing operating convenience.
FEATURES
High reliability
Wide range of use
Simple installation
Hydraulic Grips
Hydraulic grips are mainly used with test loads from 50 kN in combination with high clamping forces.
- For uniaxial compression and tension tests – 50kN
- For biaxial compression, tension and torsion tests – 200Nm
Dimensions | ||
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FLAT | 0 – 8 mm 8 – 12,7 mm |
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ROUND | 3 – 7,8 mm 7,1 – 12,7 mm 12,4 – 18 mm |
Pneumatic Grips
Pneumatic clamps are particularly suitable for a wide variety of materials, especially those that are sensitive to clamping forces, with minimal changing effort. The clamping force is generated by pneumatic actuators acting directly on the grippers or via a lever system.
- For uniaxial compression and tension tests – 20kN
- For biaxial compression, tension and torsion tests – 200Nm
Dimensions | ||
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FLAT | 0 – 8 mm 8 – 12,7 mm |
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ROUND | 3 – 7,8 mm 7,1 – 12,7 mm 12,4 – 18 mm |
Manual jaws with 2/4 screws
Screw clamps are one-sided. The side screw is used to open and close the grips, and to apply the clamping force before the start of the test.
- For uniaxial compression and tension tests – 5/60kN
Dimensions | ||
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FLAT | 0 – 8 mm 8 – 12,7 mm |
|
ROUND | 3 – 7,8 mm 7,1 – 12,7 mm 12,4 – 18 mm |
Wedge Screw Grips
The wedge-screw grips are designed for easy loading, alignment and positioning of specimens. After initial contact with the specimen, the gripping force increases as the test load increases.
- For uniaxial compression and tension tests – 50kN
- For biaxial compression, tension and torsion tests – 140Nm
Dimensions | ||
---|---|---|
FLAT | 0 – 8 mm 8 – 12,7 mm |
|
ROUND | 3 – 7,8 mm 7,1 – 12,7 mm 12,4 – 18 mm |
Wedge grips
The manual wedge action grippers are designed to facilitate the loading, alignment and positioning of specimens. After initial contact with the test specimen, the gripping force increases as the test load increases.
- For uniaxial compression and tension tests – 15kN
Dimensions | ||
---|---|---|
FLAT | 0 – 8 mm 8 – 12,7 mm |
|
ROUND | 3 – 7,8 mm 7,1 – 12,7 mm 12,4 – 18 mm |