is the AGMA specification
covering gear lubricants. The
viscosity ranges of the AGMA
numbers (or grades) conform to the International Standards Organization
(ISO) viscosity classification system (see ISO viscosity classification
system). AGMA numbers and their viscosity ranges are as follows:
Rust and
Oxidation inhibited gear oils
AGMA Lube No. |
Viscosity
Range1 mm2/s (cSt) at 40ºC |
Equivalent ISO Grade |
Extreme
Pressure gear lubricants
2
AGMA Lube No. |
Synthetic
gear oils
3
AGMA Lube No. |
|
0 |
28.2 to 35.2 |
32 |
- |
0 S |
|
1 |
41.4 to 50.6 |
46 |
- |
1 S |
|
2 |
61.2 to 74.8 |
68 |
2 EP |
2 S |
|
3 |
90 to 110 |
100 |
3 EP |
3 S |
|
4 |
135 to 165 |
150 |
4 EP |
4 S |
|
5 |
198 to 242 |
220 |
5 EP |
5 S |
|
6 |
288 to 352 |
320 |
6 EP |
6 S |
|
7,7 Comp4 |
414 to 506 |
460 |
7 EP |
7 S |
|
8,8 Comp4 |
612 to 748 |
680 |
8 EP |
8 S |
|
8A Comp4 |
900 to 1100 |
1000 |
8A EP |
- |
|
9 |
1350 to 1650 |
1500 |
9 EP |
9 S |
|
10 |
2880 to 3520 |
- |
10 EP |
10 S |
|
11 |
4140 to 5060 |
- |
11 EP |
11 S |
|
12 |
6120 to 7480 |
- |
12 EP |
12 S |
|
13 |
190 to 220 cSt at 100ºC (212ºF)5 |
- |
13 EP |
13S |
| |
Residual
Compounds
6
AGMA Lubricant No. |
Viscosity
Ranges
5
cSt at 100ºC (212ºF) |
|
|
14R |
428.5 to 857.0 |
|
15r |
857.0 to 1714.0 |
|
|
1 Per ISO 3448, Industrial Liquid Lubricants -
ISO Viscosity Classification, also ASTM-D-2422
and British Standards Institution B. S. 4231.
2 Extreme-pressure lubricants should be used
only when recommended by the gear drive manufacturer.
3 Synthetic gear oils 9S-13S are available but
not yet in wide use.
4 Oils marked Comp are compounded with 3% to
10% fatty or synthetic fatty oils.
5 Viscosities of AGMA Lubricant Number 13 and
above are specified at 100ºC (210ºF) as measurement of viscosities of these
heavy lubricants at 40ºC (100ºF) would not be practical.
6 Residual compounds-diluent type, commonly
known as solvent cutbacks, are heavy oils containing a volatile, non
flammable diluent for ease of application. The diluent evaporates leaving a
thick film of lubricant on the gear teeth. Viscosities listed are for the
base compound without diluent.
CAUTION: These lubricants may require special
handling and storage procedures. Diluent can be toxic or irritating to the
skin. Do not use these lubricants without proper ventilation. Consult
lubricant supplier's instructions
Application
Notes:
