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