Lubrication Section | Lubrication Selection

Lubrication Selection

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Selection of base oil viscosity grade (ISO-VG)

To determine the proper viscosity grade, the Cooper part number, operating temperature and speed (rpm) must be known.

Select the appropriate bearing geometry factor from the table below for the given shaft size and Series.

Multiply the geometry factor by the bearing rpm to obtain the velocity factor. Starting with the VG 150 graph on the next page (Temperature range charts), draw a vertical line from the calculated velocity factor and a horizontal line from the bearing operating temperature.

If the lines intersect inside the shaded area, a grease or oil containing a base oil viscosity grade (ISO-VG) of 150 should be suitable for use.

If the intersection of the lines is outside the shaded area on the VG 150 graph, follow the same procedures as above to determine if a VG 220 or VG 460 would be suitable.

For conditions not covered by the chart and graphs, please contact our technical department.

Geometry factors of 01, 02 and 03 Series for bore sizes through
inches	mm	Group size	01 Series	02 Series	03 Series
1 3/16 to 1 1/2	30 to 40	108	27.35	-	-
1 11/16 to 2	45 to 50	200	37.62	38.96	-
2 3/16 to 2 1/2	55 to 60	208	48.83	53.24	-
2 11/16 to 3	70 to 75	300	62.34	67.14	76.98
3 3/16 to 3 1/2	80 to 90	308	78.59	83.67	97.66
3 11/16 to 4	95 to 105	400	94.10	101.26	112.28
43/16 to 4 1/2	110 to 115	408	112.34	119.81	127.49
4 11/16 to 5	120 to 130	500	129.39	139.28	143.27
5 3/16 to 5 1/2	135 to 140	508	147.30	157.51	159.59
5 11/16 to 6 1/8	145 to 155	600	163.75	176.43	180.71
6 1/4 to 6 1/2	160	608	182.85	198.17	211.57
6 11/16 to 7	180	700	200.37	216.10	232.14
7 1/2 to 8	190 to 200	800	236.79	258.09	277.45
8 1/2 to 9 1/8	210 to 230	900	277.45	279.23	327.65
9 1/2 to 10	240 to 250	1000	322.52	343.19	358.94
10 1/2 to 11 1/8	275 to 280	1100	364.24	385.66	1100E - 396.51 1100X - 412.95
11 1/2 to 12	300	1200	412.95	435.18	463.45
12 1/2 to 13	320 to 330	1300	454.68	483.35	527.27
13 1/2 to 14 1/8	340 to 350	1400	500.71	536.13	551.12
14 1/2 to 15	380	1500	551.10	578.36	630.90
15 1/2 to 16	410	1600	599.82	630.90	-
16 1/2 to 17	420	1700	649.72	684.75	700.59
17 1/2 to 18 1/4	460	1800	700.83	730.09	758.32
18 1/2 to 19	480	1900	756.38	789.70	-
19 1/2 to 20	500	2000	809.82	836.98	917.07
20 1/2 to 21	520 to 530	2100	878.08	902.35	-
21 1/2 to 22	550 to 560	2200	933.91	965.75	994.32
22 1/2 to 23	580	2300	994.32	1030.41	1052.12
23 1/2 to 24	600	2400	1052.23	1074.21	-