C oefficient of F riction
These Starrett test fixtures conform to ASTM , TAPPI and ISO application standards for determining the coefficient of friction on films, substrates, ceramics and slip resistant finishes. Test fixtures include all accessories based on the associated test method. O peration Coefficient of friction may be measured with two different test fixtures. Both fixtures consist of a horizontal table with a moveable sled having a known mass (typically 200g). Both the table and the sled are covered with the sample under test. A cable connects to the sled and to the load cell sensor, which is attached to the test frame's crosshead. A pulley guides the cable movement ensuring that the force is measured axially. The static friction is measured as the first maximum force. The kinetic or dynamic friction is measured as an average force between two points normally measured after the static friction point. Coefficient of friction is the measured force divided by the mass of the sled used. T esting S tandards These testing standards may be used with Starrett COF test fixtures:
• ASTM D1894 • TAPPI T549 • ISO 8295 • DIN 55375
COF-ASTM STEEL, NICKEL FINISH • For COF testing per ASTM-D1894 or TAPPI-T549 • 200g rubber-faced sled mass • Operating Temperatures 32° to 158°F (0° to 70°C)
Includes rubber-faced 200g weight block
Cofficient of Friction Fixture
Load Capacity
Platen Dimensions
Weight (each)
Clevis Type
Model No.
N
KGF
LBF 110
Sled Mass (grams) Sled Surface Material
in
mm lbs
kgs 3.5
mm 15.9
Supply
COF62-1 500
50
200
Rubber
10.6 x 5.9 270 x 150 7.8
1
D imensions
80
200gr
6
67
12
335
270
15.9
80
63.5
63.5
150
60
152
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