User Manual

Series 647 Hydraulic Wedge Grip Force and
Torque Capacities
The amount of torque the grips can produce is reduced with biaxial operation. The amount of torque is affected
by the amount of axial force and the diameter of the specimen. The graphs, which follow the table, illustrate
the axial-torsional performance envelope of the Model 647.02B and Model 647.10 Hydraulic Wedge Grips
and the Model 647.25 Axial-Torsional Wedge Grips.
Note:
Charts assume that edges for RND specimens are diamond face vee or RND wedges.
Grip PressureDynamic ForceStatic ForceModel
21 MPa (3,000 psi)25 kN (5.5 kip)31 kN (7 kip)647.02B
1
21 MPa (3,000 psi)100 kN (22 kip)120 kN (27 kip)647.10
2
69 MPa (10,000 psi)250 kN (55 kip)333 kN (75 kip)647.25
3
69 MPa (10,000 psi)500 kN (110 kip)550 kN (120 kip)647.50
69 MPa (10,000 psi)1000 kN (220 kip)1200 kN (264 kip)647.100
1
Torsional force for the axial-torsional version is 220 N·m (2,000 in·lb).
2
Torsional force for the axial-torsional version can be 550 N·m (5,000 in·lb) or 1100 N·m (10,000 in·lb).
3
Torsional force for the axial-torsional version is 2200 N·m (20,000 in·lb).
24 Series 647 Hydraulic Wedge Grips Reference Manual
Introduction