AXIAL TORSION WEDGE GRIPS
1
The application of both axial and torsional forces simultaneously under fatigue conditions requires special grip design. These grips utilize a wedge action gripping technique that makes them suitable for flat specimens as well as cylindrical.
Principle of Operation Major grip components are the grip driver, wedge grip head, grip attachment flange, and jaw faces. The grip driver applies the clamping force to the grip head by moving it relative to the jaw faces, which causes the jaw faces to clamp the specimen. The grip drive also incorporates three sets of anti-rotation sliders that transfer any applied torque from the actuator to the grip and specimen. The jaw faces are either serrated or Vee-grooved to accommodate flat or cylindrical specimens.
Application Range • Axial torsion tests on flat or cylindrical specimens AXIAL/TORSION HYDRAULIC WEDGE GRIPS Catalog Number
1
8260C
Axial Capacity kN
kgf
lbf
25
2,500 5,500
Torque Capacity
Temperature Rating
Nm
in-lb
°C
°F
100
885
+10 to +40
+50 to +100
Upper Fitting
Lower Fitting
Notes
Direct to actuator/load cell
Direct to actuator/load cell
Suitable for model 8874; requires: 207-bar (3,000 psi) hydraulic power supply and 2718-111 grip control manifold
ITEMS FOR USE WITH 8260C Catalog Number
Description
2703-801
Jaw faces for flats (serrated, 0 to 6.3 mm)
2703-802
Jaw faces for flats (serrated, 6.3 mm to 12.7 mm)
2703-803
Jaw faces for rounds (Vee-serrated, 3.0 mm to 7.8 mm)
2703-804
Jaw faces for rounds (Vee-serrated, 7.1 mm to 12.7 mm)
2703-807
Jaw faces for rounds (Vee-serrated, 12.4 mm to 18.0 mm)
Notes: 1. 2703-807 rated to 10 kN Axial force and 100 Nm torsional capacity.
www.instron.com/accessories 278
