Principle of operation
The wedge action principle of these grips allows
them to be tightened onto a specimen without
altering the vertical position of the faces in
relation to the specimen. This is accomplished by
a design, which moves the grip body to close the
faces. This feature makes it possible to pre-select
the exact point at which the specimen will be held
with consistent gage length and no compressive
force applied which may cause specimen
buckling.
A strong clamping force can be applied to
materials that are difficult to hold through a high
mechanical advantage achieved by the tightening
mechanism. The grip faces are spring loaded
against a shoe which is in a fixed position in
respect to the testing frame holding mechanism,
only a light initial gripping force needs to be
applied to the specimen.
As the grip is tightened, it's frame is drawn up and
the inclined sides push against the matching side
of the faces which move laterally against the
specimen. A shoe incorporated to the driving shaft
prevents the faces from retracting.
The open front design of the grip frames allows
faces to be easily interchanged as well as easy
specimen loading. Because the faces are held in a
fixed position, there is no recoil or loosening when
the specimen ruptures, and if an extensometer is
attached, it will remain in place.
Application range
K Type of loading: tension
*Not suitable for through-zero/reverse stress
or fatigue testing
K Specimen material: wires, plastics, metals,
elastomers.
K Specimen shapes: flat, round.
Features
K Rated capacity 100 kN (10,000 kg, 22,500 lb)
K Quick set-up with rapid clamping and
unclamping action
K Easy specimen loading for increased
productivity
K Self-tightening wedge design eliminates
slippage
K
Interchangeable jaw faces for a range of
specimen geometries and types
K Fixed faces and moving body during
specimen loading
K Temperature range: -73 C to 250 C
(-100 F to 480 F)
Description
The manual wedge action grip is designed for
easy specimen loading, alignment and
positioning. After