Installation, Operation & Maintenance Manual
IM-995
13
Safety & Bearing Lubrication Instructions
*Suggested lubrication interval under ideal continuous operating conditions. Relubricate
while running, if safety permits, until some purging occurs at seals. Adjust lubrication
frequency depending on conditions of purged grease. Use one-half of listed interval for
vertical shaft applications or for 24 hour operation. Hours of operation, temperature and
surrounding conditions will affect the relubrication frequency required.
1. Lubricate with a high quality NLGI No. 2 lithium-base grease having rust inhibitors and
antioxidant additives, and a minimum oil viscosity of 500 SUS at 100°F (38°C). Some
greases having these properties are:
Shell - Gadus S2 V100 2
Mobil - Ronex MP
Mobil - Mobilith SHC100
Mobil - Mobilith SHC220
2. Lubricate bearings prior to extended shutdown or storage and rotate shaft
monthly to aid corrosion protection.
3. Any lubrication requirements noted on the general assembly drawing supersede
requirements found here.
Fans with Unit Roller Bearings
Relubrication Schedule (Months)*
Spherical Roller Bearing - Solid Pillowblocks
Shaft DIA
Speed (RPM)
500
1000
1500
2000
2500
3000
3500
4000
4500
1" thru 1
7
Τ
16
"
(25 – 35)
6
4
4
2
1
1
1
1
1
/
2
1
11
Τ
16
" thru 2
3
Τ
16
"
(40 – 55)
4
2
1
1
/
2
1
1
/
2
1
/
2
1
/
2
1
/
2
1
/
2
2
7
Τ
16
" thru 3
7
Τ
16
"
(60 – 85)
3
1
1
/
2
1
1
/
2
1
/
2
1
/
4
1
/
4
3
15
Τ
16
" thru 4
15
Τ
16
"
(90 – 125)
2
1
/
2
1
1
/
2
1
/
4
*Suggested lubrication interval under ideal continuous operating conditions. Relubricate
while running, if safety permits, until some purging occurs at seals. Adjust lubrication
frequency depending on conditions of purged grease. Use one-half of listed interval for
vertical shaft applications or for 24 hour operation. Hours of operation, temperature and
surrounding conditions will affect the relubrication frequency required.
1. Lubricate with a high quality NLGI No. 2 lithium-base grease having rust inhibitors and
antioxidant additives, and a minimum oil viscosity of 500 SUS at 100°F (38°C). Some
greases having these properties are:
Shell - Gadus S2 V100 2
Mobil - Ronex MP
Mobil - Mobilith SHC100
Mobil - Mobilith SHC220
2. Lubricate bearings prior to extended shutdown or storage and rotate shaft monthly
to aid corrosion protection.
3. Any lubrication requirements noted on the general assembly drawing supersede
requirements found here.
Fans with Ball Bearings
Relubrication Schedule (Months)*
Ball Bearing Pillowblocks
Shaft DIA
Speed (RPM)
500
1000
1500
2000
2500
3000
3500
4000
4500
1
Τ
2
" thru 1
11
Τ
16
"
(13 – 45)
6
6
5
3
3
2
2
2
1
1
15
Τ
16
" thru 2
7
Τ
16
"
(50 – 60)
6
5
4
2
2
1
1
1
1
2
11
Τ
16
" thru 2
15
Τ
16
"
(65 – 75)
5
4
3
2
1
1
1
3
7
Τ
16
" thru 3
15
Τ
16
"
(80 – 100)
4
3
2
1
1
*Suggested lubrication interval under ideal continuous operating conditions. Remove
bearing cap and observe condition of used grease after lubricating. Adjust lubrication
frequency as needed. Use one-half of listed interval for vertical shaft applications or
for 24 hour operation. Hours of operation, temperature, and surrounding conditions
will affect the relubrication frequency required. Clean and repack bearings annually.
Remove old grease, pack bearing full and fill housing reservoir on both sides of
bearings to bottom of shaft.
1. Lubricate with a high quality NLGI No. 2 lithium-base grease having rust inhibitors
and antioxidant additives, and a minimum oil viscosity of 500 SUS at 100°F (38°C).
Some greases having these properties are:
Shell - Gadus S2 V100 2
Mobil - Ronex MP
Mobil - Mobilith SHC100
Mobil - Mobilith SHC220
2. Lubricate bearings prior to extended shutdown or storage and rotate shaft
monthly to aid corrosion protection.
3. Purge or remove old grease when changing lubrication brands or types.
4. Any lubrication requirements noted on the general assembly drawing supersede
requirements found here.
Static Oil Lubrication
1. Use only high quality mineral oil with a VG grade indicated on the customer
submittal drawing.
2. Static oil level should be at the center of the lower-most roller. (Do not overfill.)
3. Complete lubrication change should be made annually.
Fans with Spherical Roller Bearings
with Split Pillowblock Housings
Relubrication Schedule (Months)*
Spherical Roller Bearing - Split Pillowblocks
Grease to
be added
at each
interval
Shaft DIA
Speed (RPM)
500
750
1000
1500 2000 2500 3000 3500 4000
1
7
Τ
16
" thru 1
15
Τ
16
"
(35 – 50)
6
4
1
/
2
4
4
3
1
/
2
2
1
/
2
2
1
/
2
1
1
0.50 oz.
2
3
Τ
16
" thru 2
13
Τ
16
"
(55 – 70)
5
4
1
/
2
4
2
1
/
2
2
1
/
2
1
1
/
2
1
/
2
1
/
4
1
/
4
0.75 oz.
2
15
Τ
16
" thru 3
15
Τ
16
"
(75 – 100)
4
1
/
2
4
3
1
/
2
2
1
/
2
1
1
/
2
1
1
/
2
2.00 oz.
4
7
Τ
16
" thru 4
15
Τ
16
"
(110 – 135)
4
4
2
1
/
2
1
1
/
2
4.00 oz.
5
7
Τ
16
" thru 6
15
Τ
16
"
(140 – 180)
4
2
1
/
2
1
1
/
2
8.5 oz.
WARNING
1. This equipment must not be operated without proper guarding of all moving parts. While performing maintenance be sure remote
power switches are locked off. See installation manual for recommended safety practices.
2. Before starting: Check all setscrews for tightness and rotate wheel by hand to make sure it has not moved in transit.
Twin City Fan
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