MTS Series 646 Hydraulic Collet Grips - Manual (Page 44)

Series 646 Hydraulic Collet Grips 44 Installation
G. Select the upper coupling set. Place the coupling half with the threaded
holes against the adapter and grip threads. Rotate it back and forth, as
necessary, until the threads mesh with the actuator and grip threads.
H. Place the other coupling half against the actuator and grip threads.
While holding the two halves together, thread the socket head cap
screws into the coupling until they are finger tight.
I. Check both ends of the coupling to ensure the gap between the two
halves is approximately equal. If necessary, tighten and loosen the
socket head cap screws to achieve this.
J. Turn the hydraulic pressure off.
5. Tighten the upper grip.
With all the socket head cap screws finger tight, rotate the coupling
assembly in the direction shown on the coupling label until it is tight. This is
essential to ensure proper preloading of the coupling.
Tighten the socket head cap screws in the order shown in this figure, first to
10%, then to 50%, and finally to 100% of the torque specified on the label.
6. Install the collets.
See “Installing a Collet” for a procedure to install the collets into the grips.
7. Connect the hydraulics.
Turn the hydraulic pressure off. Ensure that system hydraulic pressure has
been reduced to zero before proceeding.
Using the provided hydraulic hoses, make connections between the pressure
and release ports on the grip and the pressure and release ports on the
external hydraulic grip supply. See your hydraulic grip control manual for
the port locations.
8. If applicable, install the cooling kit.
Use provided magnets to attach water cooling manifold to a convenient
location on the load frame.
Make the connections between the grips and the manifold for the optional
water cooling kit as shown in the water cooling section.
1. Insert bolts, finger tight.
2. Turn coupling
to tighten joint
3. Torque bolts
11 ft-lbs / 14.9 N-m.
Axial Rating
Torsion Rating
25 kN
220 N-m
Grip/Fixture
Force Xdcr
Upper Coupling
MTS Systems Corporation Mpls., MN. Patent Pending PN 466350-02
1 4
2 3
Torque Specification