Dodge USN 500 Series Instruction Manual - Page 6

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Dodge USN 500 Series Instruction Manual
Table 7 - Viscosity of Oil in the Grease
Viscosity for Loads Up
DN
To 18% of Dyn. Cap*
(Cst @ Oper. Temp.)
2500
700
5000
650
7500
580
10000
500
12500
425
15000
390
17500
325
20000
280
22500
235
25000
200
DN = Bore Diameter (mm) x RPM
* = For loads above 18% of dynamic capacity an EP grease with the
above viscosity oil is recommended.
Table 8 - Regreasing Intervals (Months) *
(Based on 12 Hours Per Day - 66° Max.)
Size,
mm
250 500 750 1000 1250 1500 2000 2500 3000 3500
35-60
8
6
4
3
65
7
5
3
2
70-85
6
4
3
2
90-100
5
3
2
1
110-130
4
3
2
1
140-160
3
2
1
.5
Table 9 - Maximum RPM (Adapter Mount)
Shaft Size,
Basic Bearing
mm
Description
35
22308K C3
40
22209K C3
45
22210K C3
50
22211K C3
55
22212K C3
60
22213K C3
65
22215K C3
70
22216K C3
75
22217K C3
80
22218K C3
85
22219K C3
90
22220K C3
100
22222K C3
110
22224K C3
115
22226K C3
125
22228K C3
135
22230K C3
140
22232K C3
Viscosity for Loads Up
DN
To 18% of Dyn. Cap*
(Cst @ Oper. Temp.)
35000
125
40000
100
45000
85
50000
75
75000
62
100000
42
125000
30
150000
27
175000
22
200000
20
RPM*
2
1
.5
.5
.25
1
1
.5
.25
.25
1
.5
.25
.25
.5
.5
.25
.5
.25
.25
Maximum RPM
Grease
Oil
4300
5300
5600
7000
5300
6700
4500
5600
4000
5000
3600
4500
3400
4300
3200
4000
3000
3800
2600
3400
2400
3200
2200
3000
2000
2800
1800
2400
1700
2200
1600
2000
1500
1900
1400
1800
If the RPM of the application falls between 20% and 80% of
maxiumum RPM (Table 9 for adapter mount, Table 10 for direct
mount), pack the lower half of the housing one-third to one-half
full. If the RPM of the application is less than 20% of maximum
RPM, pack bearing housing cavity 100% full. If the RPM exceeds
80% of maximum RPM, do not add grease in the lower half of the
housing nor in the cap.
At each regreasing cycle, for applications up to 80% of maximum
RPM, slowly add grease until fresh grease is seen purging at the
seals. Regreasing should be done while running. Remote re-
greasing lines should be added to avoid endangering personnel.
If the RPM is greater than 80% of maximum RPM, add 4 strokes
of a handgun at each regreasing cycle for bores up to 50 mm.
For bores greater than 50 mm up to 130 mm add 8 strokes of
handgun at each regreasing cycle. For bores greater than 130
mm add 16 strokes of a handgun at each regreasing cycle.
For units running above 80% of maximum RPM, running
temperature should be monitored. If a drastic change in running
temperature is noted, it is recommended to remove the used
grease completely and recharge with fresh grease per the above
instructions.
Select a grease with a viscosity at operating temperature which
will provide full film lubrication (See Table 7). Use a 30°C-55°C
increase in bearing temperature above ambient, depending on
RPM and load. Use Table 8 as a general guide for regreasing
the bearings. A small amount of grease at frequent intervals in
.25
preferable to a large amount of grease at infrequent intervals. For
special applications involving high speeds or high temperatures
consult your local Dodge Industrial representative.
Applications such as conveyor pulleys and fans are shipped to a
job site with bearings already mounted to the shafts. Since these
units may be stored for long periods of time in unprotected areas
subject to rain, dust, etc., bearings should be packed 100% full
and so tagged at bearing assembly to prevent contamination or
corrosion of the bearings.
6
MN3066