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Recommended Bearing Lubrication Schedule
Relubrication Schedule in Months*
Fan Size 9 - 13 16 - 22 24 30 - 36
Fan
RPM
Bearing Bore (inches)
1
⁄2 - 1 1
1
⁄8 - 1
1
⁄2 1
5
⁄8 - 1
7
⁄8 1
15
⁄16 - 2
3
⁄16
to 250 12 12 12 12
500 12 12 12 12
750 12 12 12 12
1000 12 12 12 12
1250 12 12 12 12
1500 12 12 12 10
2000 12 10 8 6
2500 12 7 5 4
3000 12 5 3 2
3500 12 3 2 0.75
4000 12 2 0.5
5000 12 1
Number
of shots of
grease**
48810
* Lubrication interval is based on 12 hour per day operation and
maximum 160°F. housing temperature. For 24 hour per day
operation, the interval should be cut in half.
** Lubricant should be added with the shaft rotating and until clean
grease is seen purging from the bearing. The lubrication interval
may be modified based on the condition of the purged grease.
If bearing is not visible to observe purged grease, lubricate with
number of shots indicated for bore size.
Vektor-HS Nozzle Bearings
The bearings for the HS nozzle assembly are
permanently lubricated and do not require additional
grease.
Damper Actuators
Damper actuators, when supplied by manufacturer,
are designed to be maintenance free. No lubrication is
required.
10
Laboratory Exhaust System
®