FED-STD-791D
Method 3456.2
September 30, 1986
CHANNELING CHARACTERISTICS OF LUBRICANTS
1. SCOPE
1.1 This method is used for determining the channeling characteristics of
lubricants at low temperature.
2. SUMMARY
2.1 The test consists of storing the sample for 18 h at the temperature required by
the specification, cutting a channel in the lubricant with a metal strip, and determining
whether the lubricant flows together to cover the bottom of the container within 10 s.
3. SAMPLE SIZE
3.1 Approximately 650 mL of lubricant to be tested.
4. REFERENCES, STANDARDS, AND APPARATUS
4.1 Steel strip, square end (channeling tool), approximately 0.3
2
23 cm.
4.2 Thermometer, HB Instrument Co., No. 22360, or equivalent.
4.3 Container, flat bottom, approximately 9 cm I.D. by 11 cm high, with 2.5 cm
(minimum) legs, and with cover to support thermometer in center and steel strip at side of
container. (See Figure 1).
4.4 Heating bath, 46 to 48C.
4.5 Cooling bath (non-liquid), capable of maintaining the specified temperature
within 1C, size sufficient to accommodate container within 3 cm (minimum) clearance
on all sides.
5. MATERIALS
5. CAUTION: SOME MATERIALS ARE TOXIC AND HAZARDOUS. The
materials references and standards listed in this section must be handled carefully.
Federal Test Method 10000, Material Handling Safety Precautions, is a reference which
lists all toxic and hazardous materials cited in FTMS 791. The synonyms, life hazard,
flammability, handling and storage precautions, emergency treatment and measures, and
spill practices of each chemical are explained.
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