Instron 2716-016, Operator'S Manual

Page: 49 / 78

Wedge Grips
Operating the wedge grips consists of installing the
proper grip faces for the type of specimen you are test-
ing, and loading test specimens. The following sections
describe these procedures.
Installing Grip Faces
The grip faces, Cat. No. 2703-171 for the wedge grips
have diamond shaped 45° serrations. These are the stand-
ard faces for the wedge grips, and can handle flat speci-
mens up to 6.35 mm (0.25 in.) in thickness.
To change the grips faces, do the following:
(a) Begin to remove any grip faces currently installed in
the grips by rotating the grip-actuating thumbwheel
to open the grip faces.
(b) Unhook the four springs from the pins on the grip
faces (see Figure 4-1).
(c) The grip faces are now loose in the body of the grip.
Slide the faces out of the grip body.
(d) Check that the grip body has a coating of lubricant
on the interior surfaces that contact the grip faces. If
necessary, renew with MolyKote™ G-N Paste
grease, or equivalent. Do not allow excessive grease
to get onto the new grip faces when they are in-
stalled. Wipe away excess grease.
(d) Install the new grip faces by sliding a new pair of
faces into the body of the grip.
Op
e
rat
io
n
Wedge Grips
4-3