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Selecting a Plastic Standard Fan

WindMaster® Fan Types


WindMaster Plastic LS7 Fans
7-Blade Plastic Standard Fans

  • Clockwise rotation
  • Smaller 7-blade fan design
  • Quieter with higher operating efficiency
  • Honeycomb hub structure for maximum durability without extra weight
  • For construction excavators and loaders

Specifications

Diameters: 22”-28” [559-711.2 mm]
Standard Pilots: >1"-2.57” [25-65 mm]
Pitch Width: 4.43" [113 mm]

WindMaster Plastic MS8 and HS8 Fans
8-Blade Plastic Standard Fans

  • 8-blade fans designed to cool lower power engines in heavy- and medium-duty trucks and buses that require a less aggressive fan
  • Lighter-weight hubless design
  • For class 5 to 8 trucks and buses
  • Clockwise rotation

Specifications

Diameters: 22"-32" [559-813 mm]
Standard Pilots: >1"-7" [25-178 mm]
Pitch Width: 3.39"-3.65" [86-92 mm]
Weight: 32" diameter fan = 9.5 lbs. [4.3 kg]

WindMaster Spider HS8 Fans
8-Blade Spider Standard Fans

  • Counterclockwise rotation
  • Double steel spider wit aluminum blades
  • For heavy-duty applications
  • Off-the-shelf ordering available. For custom-made metal and composite fans, select the “Composite & Metal Fans” link on the catalog home page.

Specifications

Diameters: 25.5"-28" [647.7 - 711.2mm]
Standard Pilots: 5" [127 mm]
Pitch Width: 2.94", 3.0” and 3.94" [74.7, 76.2 & 100.1 mm]
Weight: 14.2- 24.4 lbs. [31.31 – 53.79 kg]

WindMaster Plastic MS9 Fans
9-Blade Plastic Standard Fans

  • Available in both clockwise and counterclockwise rotation.
  • 9-blade standard fans with a unique blade shape for increased airflow and efficiency
  • Maximum cooling performance and quieter operation
  • Clockwise or counter clockwise options available
  • Hubless honeycomb mounting pilot for improved stacking
  • For new reduced-emission engines on medium- to heavy-duty trucks, buses and off-highway equipment

Specifications

Diameters: 22"-30" [560-762 mm]
Standard Pilots: 2"-5" [51-127 mm]
Pitch Width: 3.5" [91 mm]
Weight: 28" diameter fan = 8.2 lbs. [3.7 kg]

WindMaster Plastic HS9 Fans
9-Blade Plastic Standard Fans

  • 9-blade standard fans designed to pull more air and draw less horsepower for greater efficiency
  • Maximum cooling performance with less load on the engine and better fuel economy
  • Unique airfoil helps maintain blade shape at high RPM’s
  • Honeycomb hub structure for maximum durability without extra weight
  • For class 5 to 8 trucks, buses and a variety of off-highway vehicles and equipment

Specifications

Diameters: 24"-32" [610-813 mm]
Blade Configurations: 9-blade
Standard Pilots: 2"-5" [51-127 mm]
Pitch Width: 3.15" and 3.59" [80 and 92 mm]

WindMaster Plastic LS12 Fans
12-Blade Plastic Standard Fans

  • Clockwise Rotation
  • Lower profile 12-blade fan design
  • Good performance at lower static pressures and smaller diameters
  • Designed for industrial sweepers, road paving equipment and small engines
  • Honeycomb hub structure for maximum durability without extra weight
  • Unique manufacturing process cuts custom pilot or bolt circles

Specifications

Diameters: 16”-24” [406-610 mm]
Standard Pilots: >1"-5” [25-127 mm]
Pitch Width: 2.45" [62 mm]

WindMaster Fans are designed to exceed OEM specifications; actual results may vary.


Selecting a Fan Blade

PILOT AND BOLT CIRCLE HOLE DIAMETERS
SUCKER OR PUSHER?
CLEARANCE INFORMATION

Ideally the fan should be centered in the shroud with half the fan blade inside the shroud and the other half outside.

CAUTION

Fan must have 1” clearance in front of and behind the blades to ensure proper clearance when installed and rotating at high speed.

OPERATING SPEED

Calculate Operating Speed by multiplying maximum engine RPM by drive ratio.

DRIVE RATIO

Calculated Drive Ratio by dividing the accessory drive or crankshaft pulley diameter by the fan drive pulley diameter.

Example:

Accessory Drive                          Fan Drive

Crank Shaft Pulley                      Pulley

MAXIMUM ENGINE RPM = 2100

DRIVE RATIO

8” ¸ 7” = 1.14:1

OPERATING SPEED

2100 X 1.14 = 2,394 rpm’s

DIAMETER AND PROJECTED WIDTH

Rotation

Fan Part Numbering System

XX X XXX XX X
OEM/AFTERMKT FAN TYPE FAN DIAMETER PILOT DIAMETER DISK OFFSET
98-OEM 1 - 9 BLADE HS9 3.5" PW 813 = 32" 10 = 1" DIA W/7.97" BC 1 = FRONT
99-AFTERMARKET 2 - 9 BLADE HS9 3.0" PW 800 = 31.5" 12 = 1" DIA W/2.36" BC 2 = CENTER
  3 - 8 BLADE 3.65" PW 787 = 31" 20 = 2" DIA W/3.5" BC 3 = BACK
  4 - 12 BLADE LS12 2.45" PW 762 = 30" 25 = 2.56" DIA W/3.5" BC  
  5 - 9 BLADE MS9  3.59" PW 750 = 29.5" 50 = 5" DIA W/ 6" BC  
  6 - 11 BLADE HS11 3.59" PW 711 = 28" 70 = 7" DIA W/8.44" BC  
  7 - 7 BLADE LS7 VARIABLE PW 700 = 27.5" 71 = 7.09" DIA W/7.874" BC
  8 - 9 BLADE CCW MS9 3.59" PW 686 = 27" 15 = 1.5" W/2.88" BC  
    680 = 26.75" 16 = 1.6" W/2.5" BC  
    660 = 26" 27 = 2.75" W/3.75" BC  
    654 = 25.75" 49 = 4.96 W/5.78" BC  
    635 = 25"    
    610 = 24"    
    584 = 23"    
    559 = 22"    
    508 = 20"