Information on the most widely used ASTM standards within the materials testing industry
100KN ~ 600KN, tension test
General introduction
Depending on the jaw surface, speci mens made of a wide range of materials can be gripped.
Description of operation
The grips operate on the 'body over wedge' principle. During gripping the hydraulic pressure present causes an axial displacement of the body of the grip, producing a uniform lateral movement of the jaws towards the specimen. No axial displacements of any kind occur between specimen and jaws, eliminating unwanted axial forces. The symmetrical design and accurate guidance of the jaws in the body housing enable accurate, central, reproducible alignment of the specimen to the tensile axis, minimizing possible flexural stresses. The grips are designed for 210 bar and can be connected to 210-bar and 280-bar systems via the grip control unit.

Hydraulic System: High pressure, lower pressure control.

Key Features
Utilizing the wedge principle, the initial clamping force on the specimen is relatively small. During the testing process, as the testing force increases, the clamping force gradually increases.Automatic adjustment of alignment is achieved through the clamping device itself, allowing the specimen to maintain vertical stretching along the axis of the tensile testing machine, preventing the generation of off-axis stresses.The clamping device uses a wedge-shaped hydraulic clamp, with the clamp body made of medium carbon forged steel.
The metal structure's flow lines nearly coincide with the mechanical
flow lines after forging, resulting in a longer fatigue life for the
clamp body. Both oil cylinders inside the clamp body have been honed,
with a surface roughness of less than 0.4.
The clamping blocks
are made from quality alloy steel, with a hardness of 60-64 HRC after
quenching, ensuring durability; the teeth of the clamping blocks utilize
an improved herringbone design, which can reduce the size and holding
length of the clamping blocks while ensuring secure gripping.
Main technical specification
Load capacity: 20Kn, 50Kn, 100KN, 300Kn, 500KN, 600KN.
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