DEZ
S
ERIES
1000
I
NSTALLATION
,
O
PERATION AND
M
AINTENANCE
M
ANUAL
18
Table 4 - Bearing Sizes and Types
Frame Size
NEMA (IEC)
Bearing Description (These are the “Large” bearings (shaft End)
in each frame size)
Bearing
OD
mm
Width
mm
Weight of
Grease to
add oz.
(grams)
Volume of grease
to be added
in
3
teaspoon
Up to 210 incl. (132)
6307
80
21
0.30 (8.4)
0.6
2.0
Over 210 to 280 incl. (180)
6311
120
29
0.61 (17.4)
1.2
3.9
Over 280
6313
140
33
0.81 (23.1)
1.5
5.2
Sample Lubrication Determination
Assume NEMA 280T (IEC 180), 1750 RPM motor driving an exhaust fan in an ambient temperature of 43
C and an
atmosphere that is moderately corrosive.
1. Table 1 lists 9500 hrs for standard conditions.
2. Table 2 classifies severity of service as “Severe.”
3. Table 3 lists a multiplier of 0.5 for severe conditions.
4. Table 4 shows 1.2 in³ or 3.9 teaspoons of grease to be added.
5.4.3 Lubrication
Procedure
Be sure that the grease you are adding is compatible
with the grease already in the motor. Consult the
factory or the motor manufacturer if you are using
grease other than the recommended type.
!
CAUTION
To avoid damage to motor bearings,
keep grease free of dirt. If you have an extremely
dirty environment, contact the factory or the motor
manufacturer for additional information.
1. Clean the grease fitting.
2. If motor has grease outlet plug, remove it.
3. If the motor is stopped, slowly add the
recommended amount of grease. If the motor is
to be greased while running, add a slightly
greater quantity of grease. Add grease slowly
until new grease appears at shaft hole in the
endplate or purge outlet plug.
4. Re-install the grease outlet plug if removed.
