T-229
JIS K 2220 regulates the specification of grease which is based on NLGI viscosity
ranges.
Table 20-6 NLGI Viscosity Grades
Besides
JIS
viscosity
classifications, Table 20-7 contains
AGMA viscosity grades and their
equivalent ISO viscosity grades.
20.2.2 Selection of Lubricant
It is practical to select a lubricant by following the catalog or technical manual of the
manufacturer. Table 20-8 is the application guide from AGMA 250.03 "Lubrication of
Industrial Enclosed Gear Drives".
Table 20-9 is the application guide chart for worm gears from AGMA 250.03.
Table 20-10 expresses the reference value of viscosity of lubricant used in the
equations for the strength of worm gears in JGMA 405-01.
NLGI
No.
Viscosity
Range
State
Application
Semi-liquid
Semi-liquid
Very soft paste
Soft paste
Medium firm paste
Semi-hard paste
Hard paste
Very hard paste
Very hard paste
No. 000
No. 00
No. 0
No. 1
No. 2
No. 3
No. 4
No. 5
No. 6
445 … 475
400 … 430
335 … 385
310 … 340
265 … 295
220 … 250
175 … 205
130 … 165
85 … 115
ü
ï
ý For Central Lubrication System
ï
þ üï
ý For Automobile Chassis
ï
þ ü
ý For Ball & Roller Bearing, General Use
þü
ü
ý For Automobile Wheel Bearing
ï
þ
ý For Sleeve Bearing (Pillow Block)
ï
þ
AGMA No. of Gear Oil
R & O Type
EP Type
ISO Viscosity
Grades
1
2
3
4
5
6
7 7 comp
8 8 comp
8A comp
9
2 EP
3 EP
4 EP
5 EP
6 EP
7 EP
8 EP
9 EP
VG 46
VG 68
VG 100
VG 150
VG 220
VG 320
VG 460
VG 680
VG 1000
VG 1500
Table 20-7 AGMA Viscosity Grades
