FED-STD-791 Lubricants, Liquid Fuels, And Related Products, Testing Method OfThis test method standard is composed of standard test methods for sampling, inspecting and testing lubricants, liquid fuels and related products. It is issued pursuant to the Federal Property and Administration Services Act of 1949, as amended and its application to the purchase of commodities referred to herein is mandatory on all Federal agencies.

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'�NOTE:This draft dated 15 April 2006' by DasH - Page 30 of 460

FED-STD-791D

5. MATERIALS

5.1 CAUTION - SOME MATERIALS ARE TOXIC AND HAZARDOUS. The

chemical materials 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.

5.2 Dry Cleaning Solvent (A-A-59601D).

5.3 Petroleum Ether (O-E-751). [1,4,0].

5.4 Di-2-ethylhexylsebacate, commercial grade. [0,0,0].

5.5 Test gear sets (2), composed of one brass and one steel gear (see Table 1).

TABLE I. Gear specifications.

Brass gear

Steel gear

Pitch diameter

1.107 cm (0.4359 in)

1.211 cm (0.9769 in)

Helix angle

55 LH

35 LH

Number teeth

0.000 cm (0.000 in)

Root diameter

ASTM B 121/B 121/M,

SAE AMS-S-7720

Composition

ASTM B 36/B 36M

Brinell hardness

100-140

210-250

Involute 14-1/2 pressure

Tooth form

angle

Normal pitch

90�

Shaft angle

6. PROCEDURE

6.1 Mount the brass gear on the drive shaft and the steel gear on the driven shaft. Scribe

alignment marks on the gears to insure that the gears are placed in the same position relative to

each other on each assembly at the test setup.