V-belt drive installation, Bearings, Vektor-ms nozzle bearings – Greenheck Vektor-MH, Vektor-MD, and Vektor-MS (464652) User Manual
Page 15: Belt drive
Recommended Bearing Lubrication Schedule
Relubrication Schedule in Months*
Synthetic Grease
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
2
7
⁄
16
- 3
3
3
⁄
16
-
3
1
⁄
2
3
15
⁄
16
-
4
1
⁄
2
4
15
⁄
16
-
5
1
⁄
2
To 250
12
12
12
12
12
12
12
12
500
12
12
12
12
12
12
12
12
750
12
12
12
12
12
12
10
7
1000
12
12
12
12
12
9
6
4
1250
12
12
12
12
9
6
4
2
1500
12
12
12
10
7
4
2
2000
12
10
8
6
3
1.5
.5
2500
12
7
5
4
1
.5
3000
12
5
3
2
.5
3500
12
3
2
.75
4000
12
2
.5
5000
12
1
Number
of shots**
4
8
8
10
16
25
41
57
* Lubrication interval is based on 12 hour 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.
• For conditions including high temperatures, moisture, dirt
or excessive vibration, consult the factory for a specific
lubrication interval for your application.
• Lubricant should be a high quality lithium complex synthetic
grease conforming to NLGI Grade 2. Factory recommends
synthetic Mobilith SHC100.
• The use of non-synthetic lubricants will decrease lubrication
intervals by approximately three times.
• Storage periods of three months or longer require monthly
rotation of the shaft and purging grease prior to storage and
start-up.
Bearings
The bearings for Greenheck fans are carefully selected
to match the maximum load and operating conditions
of the specific class, arrangement, and fan size. The
instructions provided in this manual and those provided
by the bearing manufacturer will minimize any bearing
problems. Bearings are the most critical moving part
of the fan, therefore, special care is required when
mounting them on the unit and maintaining them.
Refer to the following chart and the manufacturer’s
instructions for grease types and intervals for various
operating conditions. Never mix greases made with
different bases. This will cause a breakdown of the
grease and possible failure of the bearing.
Vektor-MS Nozzle Bearings
The bearings for the MS nozzle assembly are
permanently lubricated and do not require additional
grease.
V-Belt Drive Installation
Belt Drive
1. Remove the protective coating from the end of the
fan shaft using mineral spirits or another similar
solvent. Check to ensure that the shaft is free of
nicks and burrs.
2. Slide sheaves on shafts - do not drive
sheaves on as this may result in
bearing damage.
3. Align fan and motor sheaves
with a straight-edge or
string and tighten.
4. Place belts over sheaves.
Do not pry or force belts,
as this could result in
damage to the cords in
the belts.
5. Adjust the tension until the belts appear snug. Run
the unit for a few minutes and allow the belts to
“Set” properly.
6. With the fan off and disconnect locked out, adjust
the belt tension by moving the motor pivot plate.
When in operation, the tight side of the belts should
be in a straight line from sheave to sheave with a
slight bow on the slack side.
Aligning Sheaves with
a Straight Edge
15
Laboratory Exhaust Systems
®