Specification Sheet

3−2 Maintenance & Troubleshooting MN408
Relubrication Intervals Recommended relubrication 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, 3-4 and 3-5.
Table 3-2 Relubrication Intervals *
NEMA / (IEC) Frame Size
Rated Speed - RPM
10000 6000 3600 1800 1200 900
Up to 210 incl. (132) ** 2700 Hrs. 5500 Hrs. 12000 Hrs. 18000 Hrs. 22000 Hrs.
Over 210 to 280 incl. (180) ** 3600 Hrs. 9500 Hrs. 15000 Hrs. 18000 Hrs.
Over 280 to 360 incl. (225) ** * 2200 Hrs. 7400 Hrs. 12000 Hrs. 15000 Hrs.
Over 360 to 449 incl. (315) ** *2200 Hrs. 3500 Hrs. 7400 Hrs. 10500 Hrs.
* Relubrication intervals are for ball bearings.
For vertically mounted motors and roller bearings, divide the relubrication interval by 2.
** For motors operating at speeds greater than 3600 RPM, contact Baldor for relubrication recommendations.
Table 3-3 Service Conditions
Severity of Service
Hours per day
of Operation
Ambient Temperature
Maximum
Atmospheric
Contamination
Standard 8 40 C Clean, Little Corrosion
Severe 16 Plus 50 C Moderate dirt, Corrosion
Extreme 16 Plus >50 C* or
Class H Insulation
Severe dirt, Abrasive dust, Corrosion, Heavy
Shock or Vibration
Low Temperature <−29 C **
* 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).
Table 3-4 Relubrication Interval Multiplier
Severity of Service
Multiplier
Standard 1.0
Severe 0.5
Extreme 0.1
Low Temperature 1.0
Some motor designs use different bearings on each motor end. This is normally indicated on the motor nameplate.
In this case, the larger bearing is installed on the motor Drive endplate. For best relubrication results, only use the
appropriate amount of grease for each bearing size (not the same for both).