MIL-PRF-10924H
storage stability.
4.2 Sampling for tests. The sample for tests shall consist of two 2.27 kilogram (kg)
samples of grease taken at random from filled containers from each lot of grease (see 6.3). For
users who obtain grease in large containers, two 2.27 kg samples shall be taken in accordance
with ASTM D4057. The lot shall be unacceptable if either sample fails to comply with any of
the tests specified.
4.3 Verification methods. The types of verification methods included in this section are
visual inspection, measurement, sample tests, full-scale demonstration tests, simulation,
modeling, engineering evaluation, component properties analysis, and similarity to previously
approved or previous qualified designs.
4.3.1 Verification alternatives. The manufacturer may propose alternative test methods,
techniques, or equipment, including the application of statistical process control, tool control, or
cost effective sampling procedures, to verify performance. See the contract for alternatives that
replace verification required by this specification.
4.3.2 Inspection conditions. Unless otherwise specified herein, tests shall be conducted
on unworked grease, in any sequence.
4.3.3 Operating requirements verification. Complete each test under 4.3.3.
4.3.3.1 Finished grease property verifications. Use the test methods as specified in
table III to determine that finished grease properties are as specified within tolerances
(see 4.1.1.1).
Table III. Finished grease property test methods.
Test
ASTM and FTM Method
Dropping point
D2265
Oxidation stability (PDSC) at 210°C D5483
Worked penetration
D217
Corrosiveness (copper strip)
D4048
Water stability
D7342 Procedure A
Life performance
D3527
Evaporation (TGA)
E1131
Wear preventative characteristic
D2266
Load carrying capacity
D2596
Oil separation
D6184
Low temperature torque
FTM 7501 1/
Worked stability
D217 2/
Salt water corrosion resistance
D5969 3/
Elastomer compatibility
D4289
Roll stability
D1831
Biodegradation
D5864, D 6731 or D7373 4/
1/ Low temperature torque shall be performed in accordance with 4.3.4
6
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