MECHANICAL WEDGE GRIPS FOR FATIGUE TESTING

Instron® mechanical wedge action grips may be used in static or dynamic materials testing applications. Interchangeable wedge-shape grip faces accommodate either flat or round specimens. The grip is designed to allow test specimens to be securely gripped without introducing axial pre-loading to the specimen. This is achieved by using jaw faces that move in a horizontal direction relative to the specimen.

Principle of Operation

Each grip is mechanically operated, with gripping force being applied via movement of the grip body relative to the wedge-shaped jaw faces. This movement is induced by the tightening of four socket cap screws on the underside of the grip head. Each jaw face is located in the grip body by two extension springs, which allow the jaw faces to release the specimen after testing. The grip body wedge area is fitted with jaw guides, to ensure that the jaw faces remain square to each other and to the specimen.

Application Range

• Type of loading: Static or dynamic, reverse stress

• Specimen material: Metallics, plastics, composites

• Specimen geometries: Round section (not buttonhead) or flat specimens with or without shoulder tab

MECHANICAL WEDGE GRIPS

Safety Advice

Review safety note on page 234

ITEMS FOR USE WITH 2743-402

Catalog Number

Description

2704-521 Jaw faces for flats (flat-serrated, 0 - 7.8 mm) 50 mm wide

2704-522 Jaw faces for flats (flat-serrated, 7.1 - 15.7 mm) 50 mm wide

2704-529 Jaw faces for flats (flat-serrated, 15.0 - 21.0 mm) 50 mm wide. Quantity: 4 faces

2704-527 Jaw faces for flats (flat-serrated, 16.5 - 25.2 mm) 50 mm wide. Quantity: 4 faces

2704-525 Jaw faces for flats (carbide-coated, 0 - 7.8 mm) 50 mm wide

2704-526 Jaw faces for flats (carbide-coated, 7.1 - 15.7 mm) 50 mm wide

2704-523 Jaw faces for rounds (V-serrated, 6.1 - 11.9 mm)

2704-524 Jaw faces for rounds (V-serrated, 9.9 - 16.0 mm)

2704-528 Jaw faces for rounds (V-serrated, 16.0 - 20.0 mm) 50 mm wide. Quantity: 4 faces

2704-530 Accessory mounting block to provide M30 × 2 RH female thread. Set of 2 blocks