Designed as an integral part of the testing platform, in-head wedge grip jaws fit directly into the crosshead pocket of the frame and provide a grip that is adaptable to a variety of testing applications. These jaw faces are made from rugged heat-treated steel designed for durability and minimal maintenance, and are ideal for testing a variety flat, round, and cable specimens in compliance with ASTM E8. The teeth of the jaws are also hardened, and different tooth options increase the application range: a coarse tooth pattern is best for softer materials and higher loads, whereas a finer tooth pattern is best for harder materials. The wedge design causes the gripping force to increase as more tension force is applied. This ensures a secure gripping action with minimal slippage throughout the range of the test.

Filler plates are provided with the purchase of testing frames and allow a variety of specimen thicknesses to be tested. The filler plates adjust the opening of wedge grip jaws by changing the width of the crosshead pocket. All plates should be used for the thinnest specimens and no filler should be used for the thickest specimens.



Wedge Grip Jaw Faces for Flat Specimens

Flat wedge grip jaw faces are ideal for testing a variety of hard, flat specimens. Specimen sizes can also be varied in width, due to the variety of available grips.

  • Suitable for use with a variety of hard, flat specimens, including steel, aluminum, other metals and composite material
  • Operate in static tension only
  • Each set includes four flat wedge grip jaws

Available Models
Item Description Force Capacity Max Specimen Width Max Specimen Thickness Tooth Profile Teeth Per Inch Catalog No.
Jaw Faces 300 kN 50 mm 25 mm Horizonal 16 W-1214
Jaw Faces 300 kN 63 mm 35 mm Diamond 8 W-1258
Jaw Faces 300 kN 63 mm 35 mm Diamond 16 W-1259
Jaw Faces 600 kN 70 mm 45 mm Horizonal 8 W-1408
Jaw Faces 600 kN 70 mm 45 mm Diamond 8 W-1480-A
Jaw Faces 600 kN 70 mm 45 mm Horizonal 16 W-1409
Jaw Faces 600 kN 70 mm 45 mm Diamond 16 W-1409-A
Jaw Faces 1000 kN 82mm 50 mm Diamond 8 W-1559
Jaw Faces 1000 kN 82 mm 50 mm Diamond 16 W-1560
Jaw Faces 1500 kN 90 mm 76 mm Diamond 8 W-1660
Jaw Faces 2000 kN 100 mm 76 mm Diamond 8 W-1761
Jaw Faces 3000 kN 150 mm 105 mm Diamond 8 W-1911
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Vee Wedge Grip Jaw Faces for Round Specimens

Vee wedge grip jaw faces are ideal for testing a variety of round specimens. Most of the offered jaw faces can also be produced using through-hardened tool steel, which is suitable for re-bar applications. The variety of available jaws also allows variability in the range of specimen diameters. This versatility is due to the different depths and angles of the vee notch in the jaws available, depending on the specific dimensions of the specimen being tested.

  • Suitable for use with a variety of round specimens (including pipe, bar, tube and re-bar) made of a variety of materials (including steel, wrought iron, copper, bronze, brass, aluminum, and composites)
  • Operate in static tension only
  • Each set includes four vee wedge grip jaws

Available Models
Item Description Force Capacity Specimen Diameter Tooth Profile Teeth Per Inch Catalog No.
Jaw Faces 300 kN 5.0 - 13.0 mm Horizonal 16 W-1215-A
Jaw Faces 300 kN 12.0 - 32.0 mm Horizonal 16 W-1215
Jaw Faces 300 kN 12.7 - 40.0 mm Horizonal 10 W-1260
Jaw Faces 300 kN 12.7 - 40.0 mm Horizonal 16 W-1261
Jaw Faces 600 kN 7.0 - 25.0 mm Horizonal 16 W-1410-A
Jaw Faces 600 kN 12.7 - 57.0 mm Horizonal 10 W-1410
Jaw Faces 600 kN 12.7 - 57.0 mm Horizonal 16 W-1411
Jaw Faces 1000 kN 6.0 - 12.7 mm Horizonal 16 W-1563-A
Jaw Faces 1000 kN 12.7 - 57.0 mm Horizonal 10 W-1561
Jaw Faces 1000 kN 12.7 - 57.0 mm Horizonal 16 W-1563
Jaw Faces 1000 kN 45.0 - 85.0 mm Horizonal 10 W-1562
Jaw Faces 1500 kN 10.0 - 63.0 mm Horizonal 8 W-1669-A
Jaw Faces 1500 kN 12.7 - 82.0 mm Horizonal 10 W-1662
Jaw Faces 2000 kN 10.0 - 63.0 mm Horizonal 8 W-1669-B
Jaw Faces 2000 kN 32.0 - 95.0 mm Horizonal 10 W-1763
Jaw Faces 3000 kN 10.0 - 60.0 mm Diamond/Horizonal  Grip body range from 25 mm (#8) to 60 mm (#18), diamond cut, 10 teeth per inch
Grip inserts range from 10 mm (#3) to 25 mm (#8), horizontal cut 10 teeth per inch		 10 W-1916
Jaw Faces 3000 kN 35.0 - 125.0 mm Horizonal 10 W-1912
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Jaw Face Inserts for Cables

Cable jaw face inserts are ideal for testing seven stranded cable specimens. Cable grip jaws are only available for load frames with a capacity of 600 kN (135,000 lbs) or greater.

  • Inserts have a textured abrasive surface finish
  • Each set includes four grip inserts

Available Models
Item Description Force Capacity Specimen Diameter Catalog No.
Insert Holders 2000 kN   W-1538
Inserts 2000 kN 11.11 mm W-1538-B
Inserts 2000 kN 12.70 mm W-1538-C
Inserts 2000 kN 12.90 mm W-1538-F
Inserts 2000 kN 13.20 mm W-1538-G
Inserts 2000 kN 15.24 mm W-1538-H
Inserts 2000 kN 15.88 mm W-1538-D
Inserts 2000 kN 19.05 mm W-1538-E
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