Torsional Stiffness Apparatus0 pages

Torsional Stiffness Apparatus 108
Leather Stiffness Testing

Measure the relative stiffness of leather and other
flexible materials.
Stiffness Tester Model 108 is based on the torsion
apparatus described in test method ASTM D2821. It is
used to measure the flexibility and stiffness of a leather or
other bendable specimen and has been shown to be a
reliable method of evaluating the relative stiffness of
leather used in gloves.
Simple to use, rugged design provides repeatable test
results.
Mounted to a rigid stand, the instrument consists of a torsion
head, fixed torsional wire, and specimen clamping system.
A specimen is affixed to a weighted clamp secured at the
bottom of a torsion wire. A torsion head equipped with a dial
protractor is turned in a plane normal to the torsion wire until
the specimen has been twisted 90°. Torsion values are
obtained by measuring the applied angular twist required to
reorient the sample 90° or some other specified setting.

Shown With Optional Remote Finger Control Knob