MIL-PRF-83261C
shall be subjected to inspections for penetration, evaporation, and steel-on-steel wear as specified in
table II. If the packaged sample size is less than 0.2 kg (0.5 pound), all tests in sampling plan B (see
4.3.2) will also be run on the sample from the bulk lot. The inspection lot shall be rejected if the sample
fails any of the tests.
4.3.2 Sampling plan B. A random sample of filled unit containers shall be selected from each
packaged lot (see 6.3) of fluid in accordance with the table III. This sample(s) shall be subjected to
inspections for worked stability, oil separation, load carrying capacity, water resistance, low temperature
torque, and high temperature performance, as specified in table II. If any sample fails, the lot shall be
rejected.
TABLE I. Physical properties of grease
CHARACTERISTIC
PERFORMANCE
LIMITS
UNITS
Penetration, Unworked
280, minimum
0.1 mm
Penetration, Worked
270 350
0.1 mm
Worked Stability, 100,000 Strokes
375, maximum
0.1 mm
Penetration
Evaporation
15.0, maximum
percent
Oil Separation
20.0, maximum
percent
Load Carrying Capacity
90, minimum
kg
Water Resistance
20, maximum
percent
Steel-on-Steel Wear, 52100 Steel
1.30 maximum
mm
Steel-on Steel Wear, M-50 Steel
1.30 maximum
mm
Storage Stability, Penetration
200, minimum
0.1 mm
Unworked
Storage Stability, Penetration
30, maximum
0.1 mm
Worked (Change from Original)
Low Temperature Torque
Starting
5000, maximum
g/cm
Low Temperature Torque
Running
1000, maximum
g/cm
High Temperature Performance
Average 4 Tests
500, maximum
hours
4
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