Due to the recent application of inverter controlled motors, SFC series is designed for continuous lubrication in variable speed environments. Even if the cooling fan is balanced , excess vibration can occur during operation. Using an extended fan drive shaft (gearbox low speed shaft), run-out due to fan operation is significantly reduced. . Low Vibration Design 1 Year Maintenance free operation. Cooling Tower specific accessories are standard eqiupment. Gearbox is drilled and tapped for attachment of external air breather and oil fill/drain. The SFC gearbox is designed without protrusions beneath the mounting surface, leading to simple mounting base design and construction. The design also takes into account the use of an optional backstop and pump to be added without protruding beneath the mounting surface. . Flat Mount Design Extended Bearing Span By arranging the mounting bolt holes uniformly about the fan drive shaft, the load to the gearbox mounting base is transmitted uniformly. Balanced Mounting Load . Selection Criteria The SFC Series was specifically designed for the cooling tower environment. Use the chart to find the correct size based on motor size and reduction ratio. Maximized Surface Area High Efficiency Gearbox Cooling Fan 3 5dB(A) Noise Reduction From Previous Series Shaft speed reduction achieved using optimised gear pairs, reducing gear noise. Using FEM analysis, deflection under load is minimized and proper gear tooth contact is maintained. FEM modal analysis is also performed to minimize natural frequency oscillation. Due to the gearbox location in a cooling tower, minimal airflow from the cooling tower fan reaches it. The SFC gearbox is designed with maximum heat dissipation in mind. . Thermally Efficient Design Internal gearbox inspection possible without draining oil due to inspection cover location above operating oil level. Using internal splash oil lubrication, use of an oil pump and its periodic replacement is not required. Standard Equipment Integral Cooling Fan Oil Gauge Magnetic Plug Oil Seal Hood (Output Shaft) Backstop Oil Heater Oil Pump Flow Switch Oil Level Switch Dust-free Air Breather Vibration Sensor Seat Options Use of a backstop (optional) is to prevent reverse rotation of the cooling fan. Backstop uses the internal gear oil for lubrication. Grease lubrication type is also available. * * SFC Series Features The Cooling Tower Drives Optimised for cooling tower use Inverter Controlled Motors Available Accessories Ease of Maintanence Low Noise Fan Weight and Thrust Load Uniform Mounting Load Symetric Mounting Holes Air Flow Around the Gearbox Cooling Fan Forced Cooling Stagnant Air With a Gearbox Cooling Fan SFC Series Without a Gearbox Cooling Fan Backstop (Optional Oil Pump (Optional Flat Mount Design Extened Bearing Span Motor Size vs. Fan Speed Input Speed 1800r/min 16 18 112 100 Reduction Ratio Motor (kW) r/min Fan Speed 8 9 10 11.2 12.5 14 55 75 90 110 132 225 200 180 160 144 128 160 200 250 6.3 7.1 285 253 280 SFC045 SFC055 SFC060 SFC065 SFC070 SFC075 Gearbox Size Noise Level Under Load Power Transferred kW Noise Level dB(A) Previous Model 3 5dB(A) SFC Series Analysis Oil Fill Air Breather Inspection Cover Pipe Threads Oil Drain External Oil Gage Pipe Fan Stack Oil Gauge Cooling Fan Oil Splasher (Splash Lubrication) Backstop (optional) Oil Pump (optional) Oil Seal Hood (Output Shaft) Magnetic Plug
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Due to the recent application of inverter controlled motors, SFC series is designed for continuous lubricationin variable speed environments.
Even if the cooling fan is balanced , excess vibration can occur during operation.Using an extended fan drive shaft (gearbox low speed shaft), run-out due to fan operation is significantly reduced.
２. Low Vibration Design
1 Year Maintenance free operation.
Cooling Tower specific accessories are standard eqiupment.
Gearbox is drilled and tapped for attachment of externalair breather and oil fill/drain.
The SFC gearbox is designed without protrusions beneath the mounting surface,leading to simple mounting base design and construction.The design also takes into account the use of an optional backstop and pumpto be added without protruding beneath the mounting surface.
３. Flat Mount Design
Extended Bearing Span
By arranging the mounting bolt holes uniformly about the fan drive shaft, the loadto the gearbox mounting base is transmitted uniformly.
Balanced Mounting Load
１. Selection CriteriaThe SFC Series was specifically designed for the cooling tower environment.
Use the chart to find the correct size based on motor size and reduction ratio.
Maximized Surface Area High Efficiency Gearbox Cooling Fan
3～5dB(A) Noise Reduction From Previous SeriesShaft speed reduction achieved using optimised gear pairs, reducing gear noise. Using FEM analysis, deflection under load is minimized and proper gear tooth contact is maintained.FEM modal analysis is also performed to minimize natural frequency oscillation.
Due to the gearbox location in a cooling tower, minimal airflow from the cooling tower fan reaches it.The SFC gearbox is designed with maximum heat dissipation in mind.
４. Thermally Efficient Design
Internal gearbox inspection possible without draining oildue to inspection cover location above operating oil level.Using internal splash oil lubrication, use of an oil pump andits periodic replacement is not required.
1 1/4･3/8
1 1/4
３／ ８， １０ ｍｍ
1 1/4･1/2
Standard EquipmentIntegral Cooling Fan
Oil GaugeMagnetic Plug
Oil Seal Hood (Output Shaft)BackstopOil HeaterOil PumpFlow SwitchOil Level SwitchDust-free Air BreatherVibration Sensor Seat
Options
Use of a backstop (optional) is to prevent reverse rotation of the cooling fan.Backstop uses the internal gear oil for lubrication. Grease lubrication type is also available.
*
*
SFC Series FeaturesThe Cooling Tower Drives
Optimised for cooling tower use
Inverter Controlled Motors
Available Accessories
Ease of Maintanence
Low Noise
Fan Weight andThrust Load
Uniform Mounting Load
Symetric Mounting Holes
Air Flow Around the Gearbox
Cooling Fan
Forced CoolingStagnant Air
With a Gearbox Cooling Fan（SFC Series）
Without a Gearbox Cooling Fan
Backstop (Optional）Oil Pump (Optional）
Flat Mount Design
Exten
ed Be
aring
Span
Motor Size vs. Fan Speed Input Speed 1800r/min
16 18
112 100Reduction
Ratio
Mot
or (k
W)
r/minFan Speed
8 9 10 11.2 12.5 14
55
75
90
110
132
225 200 180 160 144 128
160
200
250
6.3 7.1
285 253
280
SFC045 SFC055 SFC060 SFC065 SFC070 SFC075GearboxSize
Noise Level Under Load
Power Transferred kW
Noise
Leve
l dB(
A)
Previous Model3～5dB(A)
SFC Series
ＦＥＭ Analysis
Oil FillAir Breather
Inspection Cover
Pipe Threads
Oil Drain
External Oil Gage Pipe
Fan Stack
Oil Gauge
Cooling Fan
Oil Splasher(Splash Lubrication)
Backstop (optional)Oil Pump (optional)
Oil Seal Hood (Output Shaft)
Magnetic Plug
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