This classification was established in the USA by the National Lubricating Grease Institute (NLGI). This classifies greases solely in terms of their hardness or softness; no other property of performance level is taken into consideration.
|
NLGI Consistency |
Kinematic Viscosity at 40°C (mm2/s |
|
|
Minimum |
Maximum |
|
|
000 |
445 |
475 |
|
00 |
400 |
430 |
|
0 |
355 |
385 |
|
1 |
310 |
340 |
|
2 |
265 |
295 |
|
3 |
220 |
250 |
|
4 |
175 |
205 |
|
5 |
130 |
160 |
|
6 |
85 |
115 |