Page 44 of 45
Product Information Packet: ECP844256T-4 - 250HP,1200RPM,3PH,60HZ,449T,TEFC,FOOT,
MN416
Installation & Maintenance 3
Table 1 Service Conditions
Severity
of Service
Ambient T
emperature
Maximum
Atmospheric
Contamination
Type of Bearing
Standard
40
°
C
Clean, Little Corrosion
Deep Groove Ball Bearing
Severe
50
°
C
Moderate dirt, Corrosion
Ball Thrust, Roller
Extreme
>50
°
C* or Class H Insulation
Severe dirt, Abrasive dust, Corrosion
All Bearings
Low T
emperature
<-30
°
C **
*
Special high temperature grease is recommended. ** Special low temperature grease is recommended.
Table
2 Lubrication Frequency (Ball Bearings)
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 5000 incl. (300)
**
*2200 Hrs.
3500 Hrs.
7400 Hrs.
10500 Hrs.
*
Relubrication intervals are for ball bearings. For vertically mounted motors and roller bearings, divide the relubrication i
nterval by 2.
**
For motors operating at speeds greater than 3600 RPM, contact Baldor for relubrication recommendations.
Table
3 Lubrication Interval Multiplier
Severity
of Service
Multiplier
Standard
1.0
Severe
0.5
Extreme
0.1
Low T
emperature
1.0
Table
4 Amount of Grease to Add
Frame
Size NEMA (IEC)
Bearing Description (Largest bearing in each frame size)
Bearing
OD
D mm
Width
B mm
W
eight of
grease to add
ounce (gram)
V
olume of grease
to add
inches
3
teaspoon
Up to 210 incl. (132)
6307
80
21
0.30 (8.4)
0.6
2.0
Over 210 to 280 incl. (180)
631
1
120
29
0.61 (17.4)
1.2
3.9
Over 280 to 360 incl. (200)
6313
140
33
0.81 (23.1)
1.5
5.2
Over 360 to 5000 incl. (300)
NU322
240
50
2.12 (60.0)
4.1
13.4
W
eight in grams = 0.005 DB