MTS Axial Extensometers - Manual (Page 26)

Configuration 26
2. Using a small adjustable wrench, grasp the sides of the upper arm.
3. Loosen the socket head cap screws with a hex wrench.
4. Repeat Step 2 and Step 3 to loosen the socket head cap screws on
the lower arm.
5. With the attachment hook in place, loosely attach the quick
attachment spring attachment adapter to the extensometer arm.
Repeat this step for the other arm.
6. Slide the selected knife edge under the attachment adapter and
between the two socket head cap screws on each extensometer arm.
• Use straight knife edges for round specimens. If straight knife
edges are being used, place the flat surface of a machinist’s
square or similar object across the face of both knife edges to
ensure that they are parallel to each other.
• Use three-point knife edges for flat specimens. Ensure that the
single-point contact knife edge is in the upper arm and the
two-point contact knife edge is in the lower arm.
7. Tighten the socket head cap screws on both extensometer arms.
How to Install Sliding Springs
Installing the sliding quick attachment springs on an extensometer
involves removing the existing knife edge hold-down from each arm of
the extensometer and replacing it with the adapter attachment.
Upper
Attachment
Adapter
Lower
Attachment
Adapter
Socket Head
Cap Screws
Front View
Knife Edges
Knife Edge
Hold-Down
and
Attachment Hook
Knife Edge
Hold-Down
and
Attachment Hook
(Top View)
(Bottom View)
Sliding springs
are mounted
here.