NLGI Grease Classification System
|
NLGI Grade |
Worked Penetration (ASTM D 217) @ 77°F |
Consistency Comments |
|
000 |
445-475 |
Semifluid (pourable) |
|
00 |
400-430 |
|
|
0 |
355-385 |
|
|
1 |
310-340 |
Slightly soft grease |
|
2 |
265-295 |
Most common grease grade |
|
3 |
220-250 |
Stiff grease |
|
4 |
175-205 |
|
|
5 |
130-160 |
Hard grease |
|
6* |
85-115 |
Very hard. “Brick Grease” |
|
* Grade 6 is reported as a block penetration because it holds its shape and is too stiff to be worked. A modified procedure requiring a cutting instrument is required for block penetration.
|
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