DeLUX DPX12T, Installation & Operation Manual

Page: 370 / 383

T
able 2 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 temperatur
e
gr
ease is r
ecommended.
**
Special low temperatur
e
gr
ease is r
ecommended.
T
able
3
Lubrication Interval Multiplier
Severity
of Service
Multiplier
Standard
1.0
Severe
0.5
Extreme
0.1
Low T
emperature
1.0
T
able
4
A
m
ount of Grease to Add
Bearing Description (Largest bearing in each frame size)
Frame Size NEMA
(IEC)
Bearing
OD
Width
Weight of
grease
to
add
Volume of grease to add
(IEC)
Bearing
OD D mm
Width B
mm
grease to add ounce (gram)
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. (225)
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
Weight in grams = 0.005 DB
Procedure
Clean
the gr
ease fitting (or ar
ea ar
ound gr
ease hole, if equipped with slotted
gr
ease scr
ews). If motor has a purge plug, r
emove it. Motors can be
re
gr
eased while stopped (at less than 80
°
C) or running.
Apply gr
ease gun to fitting (or gr
ease hole). T
oo much gr
ease or injecting
gr
ease to quickly can cause pr
ematur
e bearing failur
e. Slowly apply the
recommended amount of gr
ease, taking 1 minute or so to apply
. Operate
motor f
or 20 minutes, then r
einstall purge plug if
pr
eviously r
emoved.
Caution: Keep gr
ease clean. Mixing dissimilar gr
ease is not r
ecommended.
Sample Relubrication Determination
This sample deter
mination is based on a NEMA 286T (IEC 180) motor
operating at 1750 RPM driving an exhaust fan in an ambient of 43
°
C
atmospher
e that is moderately corr
osive.
1.
Table 1 list 9500 hours for standar
d conditions.
2.
Table 2 classifies severity of service as Sever
e"
.
3.
Table 3 lists a multiplier value of 0.5 for Sever
e conditions.
4.
Table 4 shows that 1.2 in
3
or 3.9 teaspoon of gr
ease is to be added.
Note:
Smaller bearings in size categor
y may r
eq
uir
e r
educed amounts of
gr
ease.
P
.O. Box 2400
Fort Smith, AR 72902–2400 U.S.A. (501) 646–471
1
LB5028
1/01