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Belt-Driven Radiator Cooling Fans

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Belt-Driven Radiator Cooling Fans

Belt-driven radiator fans are engine cooling fans driven directly by power from the engine via a pulley or belt from the water pump.

There are two main types of a belt-driven...

Belt-driven radiator fans are engine cooling fans driven directly by power from the engine via a pulley or belt from the water pump.

There are two main types of a belt-driven fan: clutch fans and flex fans.

Clutch Fans


Belt-driven clutch fans attach to a fan clutch. Most of the time, these fans are spinning at some fraction of the water pumps’ speed, but above a certain temperature, the thermostat in the fan clutch fully locks up, and the fan operates at the same speed as the water pump, drawing extra air through the radiator.

Flex Fans


Flex fans don’t have a clutch, so they spin at 100% of the speed of the water...

Belt-driven radiator fans are engine cooling fans driven directly by power from the engine via a pulley or belt from the water pump.

There are two main types of a belt-driven fan: clutch fans and flex fans.

Clutch Fans


Belt-driven clutch fans attach to a fan clutch. Most of the time, these fans are spinning at some fraction of the water pumps’ speed, but above a certain temperature, the thermostat in the fan clutch fully locks up, and the fan operates at the same speed as the water pump, drawing extra air through the radiator.

Flex Fans


Flex fans don’t have a clutch, so they spin at 100% of the speed of the water pump all the time! Most flex fans also have flexible blades that flatten out at high speeds, reducing the parasitic loss of horsepower.

Belt-driven vs. Electric Cooling Fans


Which is the right fan for your application? Since their speed is tied directly to rpms, mechanical radiator fans are ideal for vehicles that operate at higher revs, like towing vehicles and off-road rigs. They’re also simpler, without sensors, wiring, or electrical draw to worry about.

There are a lot of advantages to switching to an electric fan: they take up less room, they’re more energy efficient, and you can manually deactivate them (a handy feature for off-road vehicles crossing water or mud).

For a complete discussion on the subject of radiator cooling fans, check out this article on our blog.

Top Brands


Summit Racing Equipment has everything you need for anything you drive, and that includes belt-driven fans in a wide variety of sizes and blade counts, plus stock replacement and restoration fans. Shop here for the best brand names in cooling, including Flex-a-lite, Goodmark, Dorman, Perma-Cool, Maradyne, Vintage Air, and many more.

Individual Parts

Results 1 - 25 of 47

Fan, Rigid Style Race, Steel Blades, Standard Rotation, 18 in., 2.25 in. Depth, 8,000 RPM Rated, Each

Part Number: DER-17318

4.89 out of 5 stars ( 28 )

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Fan, Mechanical, Extra-Duty, 6 Blades, Steel Hub, Black, Clockwise Rotation, 17.00 in. Diameter, Ford, Each

Part Number: SDK-C6ZZ-8600-C

4.94 out of 5 stars ( 16 )

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Fan, Mechanical, Cooling, Straight Tip Style, Clockwise Rotation, 7 Blades, Steel, Black, 18.00 in. Diameter, Buick, Chevrolet, Olds, Pontiac, Each

Part Number: OPG-C980305

5.0 out of 5 stars ( 1 )

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Fan, Mechanical, Rigid Race, 17 in. Diameter, Steel, Reverse Rotation, 8,000 RPM Rating, Each

Part Number: DER-17417

4.71 out of 5 stars ( 14 )

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Fan Rigid Style Race Steel Blade 19" Std. Rotation 2" Depth 6,000 RPM Rated

Part Number: DER-17319

4.64 out of 5 stars ( 11 )

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Fan, Mechanical, Rigid Race, 13 in. Diameter, Steel, Standard Rotation, 8,000 RPM Rating, Each

Part Number: DER-17313

5.0 out of 5 stars ( 7 )

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Fan, Mechanical Cooling Fan, 5 Blades, Clockwise Rotation, Black Steel Blades, 3 in. Bolt Circle for Fan Clutch, Chevrolet, Each

Part Number: GMK-401031264

5.0 out of 5 stars ( 1 )

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Fan Rigid Style Race Steel Blade 18" Rev. Rotation 2" Depth 6,000 RPM Rated

Part Number: DER-17418

4.56 out of 5 stars ( 9 )

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Fan, Mechanical, 6 Blades, Steel, Black, Clockwise Rotation, Jeep, Each

Part Number: CWA-J0994277

4.5 out of 5 stars ( 2 )

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Fan, Mechanical, 5 blades, Clockwise Rotation, Steel Hub, Black, 17.00 in. Diameter, Ford, Each

Part Number: SDK-C5ZZ-8600-C

4.0 out of 5 stars ( 2 )

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Fans, Mechanical, 4-Blade, Clockwise Rotation, Steel, Black, 19.00 in. Diameter, Each

Part Number: AAF-ALL30099

5.0 out of 5 stars ( 1 )

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Fan, Mechanical, Race, 17 in., Standard Clockwise Rotation, Steel Hub, Steel Blades, Silver, Each

Part Number: FLX-125855

5.0 out of 5 stars ( 1 )

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Fan, Mechanical, 7 Plastic Blades, White, Clockwise Rotation, 16.00 in. Diameter, Nissan, 2.4L, Each

Part Number: RNB-620-450

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Mar 19, 2026 if ordered today

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Estimated Ship Date: Mar 19, 2026 if ordered today

Fan, Mechanical, 10 blades, Counterclockwise Rotation, Steel Hub, White Blades, 18.00 in. Diameter, Ford, Each

Part Number: FSS-36882

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Fan, Mechanical, 7 Steel Blades, Black, Clockwise Rotation, Ford, 428, Each

Part Number: SDK-C9ZE-8600-E

4.25 out of 5 stars ( 4 )

Estimated Ship Date: Mar 25, 2026 if ordered today

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Estimated Ship Date: Mar 25, 2026 if ordered today

Fan, Mechanical, 9 blades, Counterclockwise Rotation, Electronic Clutch, Black Blades, Land Rover, Each

Part Number: FSS-46119

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Estimated Ship Date: Mar 17, 2026 if ordered today

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Estimated Ship Date: Mar 17, 2026 if ordered today

Fan, Mechanical, 9 blades, Clockwise Rotation, Electronic Clutch, Black Blades, Land Rover, Each

Part Number: FSS-46120

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Estimated Ship Date: Mar 16, 2026 if ordered today

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Estimated Ship Date: Mar 16, 2026 if ordered today

Fan, Mechanical, Clockwise Rotation, Six Steel Blades, Silver, 17 in. Diameter, Each

Part Number: AFC-80181

5.0 out of 5 stars ( 1 )

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Fan, Mechanical, Clockwise Rotation, 10 Blades, Plastic, Black, Buick, Chevy, GMC, Oldsmobile, Each

Part Number: RNB-620-619

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Estimated Ship Date: Mar 19, 2026 if ordered today

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Estimated Ship Date: Mar 19, 2026 if ordered today

Fan, Flex-Type, Wide Blade, Clockwise, 19.312 in. Diameter, Stainless Steel Blades/Steel Hub, Universal, Each

Part Number: FLX-105496

4.0 out of 5 stars ( 8 )

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Fan, Flex-Type, Wide Blade, Clockwise, 18.25 in. Diameter, Stainless Steel Blades/Steel Hub, Universal, Each

Part Number: FLX-104803

5.0 out of 5 stars ( 4 )

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Fan, Flex-Type, Wide Blade, Clockwise, 17 in. Diameter, Stainless Steel Blades/Steel Hub, Universal, Each

Part Number: FLX-104482

4.79 out of 5 stars ( 19 )

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Fan, Flex, Mechanical, Clockwise, 16 in. Diameter, Stainless Steel Blades/Steel Hub, Each

Part Number: FLX-101254

5.0 out of 5 stars ( 8 )

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Fan, Flex-Type, Wide Blade, Clockwise, 18.25 in. Diameter, Stainless Steel Blades/Steel Hub, Universal, Each

Part Number: FLX-104483

5.0 out of 5 stars ( 10 )

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Fan, Clutch-Type, Clockwise, 17 in. Diameter, Steel Blades/Hub, Universal, Each

Part Number: VTA-32517-VUF

5.0 out of 5 stars ( 3 )

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