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Lubrication & Bearings
of a grease (over time) depends primarily on the type of grease, the size of the bearing, the speed at
which the bearing operates and the severity of the operating conditions. Good results can be obtained if
the following recommendations are used in your maintenance program.
Type of Grease A high grade ball or roller bearing grease should be used. Recommended grease for standard
service conditions is Polyrex EM (Mobil).
Equivalent and compatible greases include:
Texaco Polystar, Rykon Premium #2, Pennzoil Pen 2 Lube and Chevron SRI−2.
− Maximum operating temperature for standard motors = 110° C.
− Shut−down temperature in case of a malfunction = 115° C.
Lubrication Intervals Recommended lubrication intervals are shown in Table 3-2. It is important to realize that the
recommended intervals of Table 3-2 are based on average use.
Refer to additional information contained in Tables 3-3 and 3-4.
NEMA / (IEC) Frame Size
Up to 210 incl. (132)
Over 210 to 280 incl. (180)
Over 280 to 360 incl. (225)
Over 360 to 500 incl. (300)
*
Lubrication intervals are for ball bearings. For roller bearings, divide the listed lubrication interval by 2.
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.
3-2 Maintenance & Troubleshooting
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Bearing grease will lose its lubricating ability over time, not suddenly. The lubricating ability
Table 3-2 Lubrication Intervals *
>2500
5500 Hrs.
3600 Hrs.
* 2200 Hrs.
*2200 Hrs.
Table 3-3 Service Conditions
Ambient Temperature
Maximum
40° C
50° C
>50° C* or
Class H Insulation
<-30° C **
Table 3-4 Lubrication Interval Multiplier
Severity of Service
Standard
Severe
Extreme
Low Temperature
Base Speed - RPM
1750
1150
12000 Hrs.
18000 Hrs.
9500 Hrs.
15000 Hrs.
7400 Hrs.
12000 Hrs.
3500 Hrs.
7400 Hrs.
Atmospheric
Contamination
Clean, Little Corrosion
Moderate dirt, Corrosion
Severe dirt, Abrasive dust,
Corrosion
Multiplier
1.0
0.5
0.1
1.0
<800
22000 Hrs.
18000 Hrs.
15000 Hrs.
10500 Hrs.
Type of Bearing
Deep Groove Ball Bearing
Ball Thrust, Roller
All Bearings
All Bearings
MN605
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Table of Contents
Troubleshooting
