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
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
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" | ||||