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 initial face to specimen contact,
gripping force will increase as the testing load
increases. Virtually no pre-load is seen during
specimen clamping due to Instron's design of
moving grip bodies. This makes them particularly
suitable for testing high strength materials, such
as metals and composites, ensuring that
specimen slippage is eliminated.
G
2716-002 Wedge action grips
2716 Series Manual
Wedge Action Grips
Catalog number 2716-002
Specifications
Catalog number
2716-002
Maximum capacity
100 kN (10,000 kg, 22,500 lb)
Mechanical connection
Upper fitting in clevis pin (Type Dm)
Lower fitting in clevis pin (Type Dm)
Effective length (A)
Upper grip 230 mm (9.0 in)
Lower grip 230 mm (9.0 in)
Body width (B)
144 mm (5.67 in)
Overall width (C)
222 mm (8.75 in)
Weight (faces)
0.468 kg (1.0 lb)
Weight (no faces)
Upper grip 10 kg (20 lb)
Temperature range
-73 C to 250 C (-100 F to 480F)
Working principal
Manual Wedge action
Gripping length
57 mm (2.2 in)
G
Faces
Catalog Number
Specimen Thickness
Surface
Clamping Area
Application
(width x height)
2703-001
0 to 6.4 mm
Diamond Serrated
25 mm X 57 mm
For gripping metal, plastic, and fiber
(0 to 0.25 in)
Pitch 1.5 mm (16 teeth per in) (1 in X 2.2 in)
reinforced plastic specimens with or without
2703-002
6.4 to 12.6 mm
shoulder tab ends
(0.25 to 0.5 in)
2703-006
0 to 6.4 mm
Diamond Serrated
25 mm X 57 mm
For gripping metal, plastic, and fiber
(0 to 0.25 in)
Pitch 1.0 mm (25 teeth per in)
(1 in X 2.2 in)
reinforced plastic specimens with or without
2703-007
6.4 to 12.6 mm
shoulder tab ends
(0.25 to 0.5 in)
2703-070
12 to 16 mm
Round threaded (Note 3)
57 mm (2.2 in) on a For gripping round specimen with or without
(0.25 to 0.63 in)
Pitch 1.5 mm (16 teeth per in) 0.75 - 16 UNF-2B (threaded) shoulder tabs, and pipe/tube with plugs
2703-071
16 to 19 mm
57 mm (2.2 in) on a
(0.63 to 0.75 in)
0.875-16 UNF-2B (threaded)
2703-004
7 to 12.7 mm
Vee-Serrated (Note 3)
For gripping round specimen with or without
(0.28 to 0.5 in)
Pitch 1.5 mm (16 teeth per in)
shoulder tabs, and pipe/tube with plugs
2703-008
3.5 to 8 mm
Vee-Serrated (Note 3)
(0.13 to 0.31 in)
Pitch 1.0 mm (25 teeth per in)
2703-009
7 to 12.7 mm
(0.28 to 0.5 in)
2703-010 12.7 to 19 mm
Faces. Vee-serrated, flat serrated (1.0 mm), round threaded, and flat serrated (1.5 mm)
G
Grip dimensions
2716 Series Manual Wedge Action Grips
Catalog number 2716-002
Notes:
1. Grip catalog number provides two grips.
2. Grips may require a coupling to connect to load cell or machine base
3. Upper grip may require a flexible coupling for certain applications.
Notes:
1. Faces catalog number provides 4 faces.
2. All faces are hardened to 60-65 Rc, excluding rubber coated and if otherwise specified.
3. Threaded and Vee style faces are used for round specimens.
Corporate Headquarters
100 Royall Street, Canton, Massachusetts 02021-1089, USA
Tel: 800-564-8378 or 781-575-5000 Fax: 781-575-5751
Copyright Instron 2002. All rights reserved
Instron is a registered trademark of Instron Corporation
Instron reserves the right to change specifications without notice
pod_2716_002b_1002
European Headquarters
Coronation Road, High Wycombe, Bucks HP12 3SY, United Kingdom
Tel: +44 1494 464646 Fax: +44 1494 456123
(0.5 to .75 in)
www.instron.com
57 mm (2.2 in) on a 120
included angle vee groove