Tensile Wedge Grip Inserts There are two basic types of mechanical wedge grips. Either the grip bodies move and the wedges remain stationary while being tightened on the specimen, or the wedges move as they tighten on the specimen and the bodies of the grips remain stationary.
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Fig. 1: Typical Tensile Wedge Grip Inserts, for both flat and round test specimens.
Wedge grip inserts of all types, in all sizes and load capacities to fit all existing wedge grip bodies, can be provided, including custom designs for special applications. While machined serration grip faces, either straight- or cross-serrated, are very popular, grip faces coated with tungsten carbide particles are also being used more extensively.
Some examples of tensile wedge grip inserts are shown in Fig. 1. The particular grip inserts shown are for 22 and 55 kip load capacity hydraulic wedge grips.
Figure 2 shows close-ups of tungsten carbide particle-coated and machined grip faces.
Fig. 2: Close-up of typical tungsten carbide particle-coated (left) and machine-cut serrated diamond pattern (right) grip faces.
Additional examples of mechanical wedge grips coated with tungsten carbide particles are shown in Fig. 3.
Fig. 3: MTS Advantage Mechanical Wedge Grips, coated with tungsten carbide particles.