Wedge Action Grips

Wedge action grips induce a wedging action as the jaw inserts slide relative to angled interior walls of the grip ‘chamber’ or grip body. As the jaws close, the clamp force to the test specimen increases both during test sample installation and the test loading.

Mechanical wedge action grips are more popular than power assisted pneumatic or hydraulic action grips because they are generally more compact, more affordable, and simpler to use. Power assist is very beneficial in higher force testing applications.

Mechanical wedge action grip feature either stationary grip bodies or stationary jaw inserts. Stationary grip bodies are coupled to the test machine and remain fixed. The jaws move during opening and closing and sample insertion. Wedge grips with stationary jaw inserts reduce or eliminate undesirable axial compressive loads that can cause sample damage as they are tightened. Stationary jaws clamp the sample without requiring axial movement. With some stationary jaw grips, handles turn a collar that moves the grip body. The jaw inserts couple directly to the test frame. Note that achieving the same goals is possible using adjustable jaws (fixed grip), with a more inconvenient sample loading procedure.

Wedge angle is typically small (e.g. 10-15 degrees) which limits the range of opening or sample thickness range with a jaw inserts. Multiple jaw inserts are then needed to cover multiple sample thicknesses.

All wedge action grips perform tensile tests. In fatigue testing applications, selected grips can perform tension-tension fatigue tests. Hydraulic action wedge grips can perform tension-compression, through zero loading, or compression-compression tests because of their design. The wisest path to selecting the best grip for your applications is to contact our applications engineer who will help you select or design a solution for you.

Wedge Action Grips

Mechanical Wedge Grips

Pneumatic Wedge Action Grips

Hydraulic Wedge Action Grips

18 results - showing 1 - 10

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	Details
	Mechanical Wedge Grip - G109 Wedge Action Grips » Mechanical Wedge Grips Specification Force 6 models from 22500 lb (100 kN) to 112,500 lb (500 kN) Grip Type Fixed or stationary grip body while jaws move vertically and laterally Accessories Thickness Flat samples to 2 in (50 mm); Round samples to 1.75 in (44 mm) diameter
	Tensile Mechanical Wedge Grip - G140W Wedge Action Grips » Mechanical Wedge Grips Specification Force 3 models from 90000 lb (400 kN) to 135000 lb (600 kN) Accessories Thickness 1.97 in (50 mm)
	Motorized Wedge Grip - G185 Wedge Action Grips » Mechanical Wedge Grips Specification Force 22500 lb (100 kN) Grip Type Jaws held in stationary (vertically) sample position while grip body moves adjustment. Accessories Thickness 0.63 in (16 mm)
	Mechanical Wedge Grip - G204 Wedge Action Grips » Mechanical Wedge Grips Specification Force Two different models - both rated 11250 lb (50 kN) Grip Type Fixed or stationary grip body while jaws move vertically and laterally Accessories Thickness 1.57 in (40 mm) or 2.36 in(60 mm)
	Wedge Grip for High Strength Wide Width Textiles - G208 Wedge Action Grips » Mechanical Wedge Grips Specification Force 9000 lb (40 kN) & 44500 lb (200 kN) Grip Type Fixed or stationary grip body while jaws move vertically and laterally Accessories Thickness 0.23 in (6 mm); 0.47 in (12 mm); 0.8 in (20 mm)
	Mechanical Wedge Grip - G243 Wedge Action Grips » Mechanical Wedge Grips Specification Force 4500 lb (20 kN) & 11250 lb (50 kN) Grip Type Fixed or stationary grip body while jaws move vertically and laterally Accessories Thickness 0.63 in (16 mm); 0.4 in (12 mm)
	Mechanical Wedge Grip - G256 Wedge Action Grips » Mechanical Wedge Grips Specification Force 1125 lb (5 kN) Grip Type Fixed or stationary grip body while jaws move vertically and laterally Accessories Thickness 0.31 in (8 mm)
	Mechanical Wedge Grip - G45 Wedge Action Grips » Mechanical Wedge Grips Specification Force 3 models from 55000 lb (250 kN) to 90000 lb (400 kN) Grip Type Round, Flat Accessories Thickness 2.95 in (75 mm)
	Mechanical Wedge Grip - G527 Wedge Action Grips » Mechanical Wedge Grips Specification Force Four models from 2250 lb (10 kN) to 55000 lb (250 kN) Grip Type Jaws move laterally in stationary position while grip bodies move on adjustment. Accessories Thickness Models vary from 0.63 in (16 mm) to 1.2 in (30 mm)
	Mechanical Wedge Grip - G622 Wedge Action Grips » Mechanical Wedge Grips Specification Force 2250 lb (10 kN) Grip Type Fixed or stationary grip body while jaws move vertically and laterally Accessories Thickness 0.43 in (11 mm)