Instron 2716-016, Operator'S Manual

Page: 53 / 78

Screw Grips
Operation of the screw grips consists of installing the
proper grip faces for the type of specimen you will be
testing, and loading test specimens. The following sec-
tions describe these procedures.
Installing Grip Faces
There are four types of grip faces available for the Screw
Grips, which are attached by means of set screws. The
four types are described as follows:
•
Smooth Face, Cat. No. 2702-130 - These faces work
with a wide variety of specimens, and are the stand-
ard grip faces for the Screw Grips.
•
Serrated Face, Cat. No. 2702-131 - These faces have
a diamond pattern, 40-teeth per inch serration, and
are used for hard or metallic specimens that are
more difficult to grip than standard specimens.
•
Rubber Face, Cat No. 2702-132 - These faces have a
thin rubber surface bonded to the faces to grip thin
specimens such as paper and polymer films that can-
not be gripped satisfactorily with the above faces.
•
Line Contact Face, Cat. No. 2702-133 - These faces
have a rubber surface bonded to one face, and have a
horizontal, semi-circular rib molded into the other
face. These faces are generally used for soft speci-
mens.
It is not necessary to have the same type of grip faces in
both the upper and lower grips. It is necessary, however,
Op
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Screw Grips
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