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Severity of Service
Standard
Severe
Extreme
Low Temperature
* Special high temperature grease is recommended (Dow Corning DC44). Note that Dow Corning DC44 grease does not mix with other grease types.
Thoroughly clean bearing & cavity before adding grease.
** Special low temperature grease is recommended (Aeroshell 7). Different brushes may also be required.
Contact your local Baldor district office or an authorized Baldor service center for technical assistance.
Frame Size
NEMA (IEC)
Up to 210 incl. (132)
Over 210 to 280 incl. (180)
Over 280 to 360 incl. (225)
Over 360 to 500 incl. (300)
* Weight in grams = .005 DB
Lubrication Procedure
Be sure that the grease you are adding to the motor is compatible with the grease already in the motor. Consult
your Baldor distributor or an authorized service center if a grease other than the recommended type is to be used.
Caution:
To avoid damage to motor bearings, grease must be kept free of dirt. For an extremely dirty environment,
contact your Baldor distributor or an authorized Baldor Service Center for additional information.
With Grease Outlet Plug
1.
Clean all grease fittings.
2.
Remove grease outlet plug.
3.
If motor is stopped, add the recommended amount of grease.
If motor is to be greased while running, a slightly greater quantity of grease will have to be added.
Add grease slowly until new grease appears at shaft hole in the endplate or purge outlet plug.
4.
Re-install grease outlet plug.
Without Grease Outlet Plug
1.
Disassemble motor.
2.
Add recommended amount of grease to bearing and bearing cavity. (Bearing should be about 1/3 full of
grease and outboard bearing cavity should be about 1/2 full of grease.)
Note: Bearing is 1/3 full when only one side of bearing is completely full of grease.
3.
Assemble motor.
Sample Lubrication Determination
Assume - NEMA 286T (IEC 180), 1750 RPM motor driving an exhaust fan in an ambient temperature of 43° C and
the atmosphere is moderately corrosive.
1.
Table 3-2 list 9500 hours for standard conditions.
2.
Table 3-3 classifies severity of service as "Severe".
3.
Table 3-4 lists a multiplier value of 0.5 for Severe conditions.
4.
Table 3-5 shows that 1.2 in
Note: Smaller bearings in size category may require reduced amounts of grease.
3-2
Table 3-3 Service Conditions
Ambient Temperature
Maximum
40° C
50° C
>50° C * or Class H Insulation Severe dirt, Abrasive
<-30° C **
Table 3-4 Lubrication Interval Multiplier
Severity of Service
Standard
Severe
Extreme
Low Temperature
Table 3-5 Bearings Sizes and Types
Bearing Description (These are the Large bearings (Shaft End) in each frame size)
OD
Bearing
D mm
6307
80
6311
120
6313
140
NU319
200
or 3.9 teaspoon of grease is to be added.
3
Atmospheric
Type of Bearing
Contamination
Clean, Little Corrosion
Deep Groove Ball Bearing
Moderate dirt,
Ball Thrust, Roller
Corrosion
All Bearings
dust, Corrosion
All Bearings
Multiplier
1.0
0.5
0.1
1.0
Weight of Grease to
Width
add oz (Grams) *
B mm
21
0.30 (8.4 )
29
0.61 (17 )
33
0.81 (23 )
45
2.12 (60)
Volume of grease to be added
in
teaspoon
3
0.6
2.0
1.2
3.9
1.5
5.2
4.1
13.4
MN605
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Troubleshooting
