WinGD W-X82 - Page 180

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The (older) NAS 1638 and SAE AS 4059 cleanliness classes for oils are given in
Table 4.
Table 4: NAS 1638 and SAE AS 4059 Cleanliness Classes
Contamination (particles/100 ml)
Particle size (mm or microns)
Class 5 to 15 15 to 25 25 to 50 50 to 100 100 to 150
(14) 4 096 000 729 600 129 600 23 040 4 096
(13) 2 048 000 364 800 64 800 11 520 2 048
12 1 024 000 182 400 32 400 5 760 1 024
11 512 000 91 200 16 200 2 880 512
10 256 000 45 600 8 100 1 440 256
9 128 000 22 800 4 050 720 128
8 64 000 11 400 2 025 360 64
7 32 000 5 700 1 012 180 32
6 16 000 2 850 506 90 16
5 8 000 1 425 253 45 8
4 4 000 712 126 22 4
3 2 000 356 63 11 2
2 1 000 178 32 6 1
1 500 89 16 3 1
0 250 44 8 2 0
00 125 22 4 1 0
2017−08
Lubricating Oils