18in Stainless Fan

The DERALE 18 inch Stainless Fan (model 19118) is a mechanical flex-drive cooling fan engineered for engine heat management across automotive, marine, and industrial applications. This flex-fan design reduces parasitic drag at highway speeds while maintaining full cooling capacity during low-rpm operation, making it ideal for vehicles that demand thermal efficiency without constant-speed penalty. The 6-blade stainless steel construction resists corrosion in salt-air environments and high-temperature cycling, while the steel hub and universal bolt pattern accommodate a wide variety of engine configurations.

Measuring 18 inches in diameter with a 5/8-inch pilot bore, the fan weighs 2.95 lbs and is designed to mate with standard radiator shroud setups. The flex-blade technology automatically adjusts pitch under load, pulling maximum airflow when engine temperatures spike and reducing drag during cruise, which translates to measurable fuel economy gains on highway drives. Stainless blades handle thermal shock better than conventional steel, reducing blade fatigue and extending service life in high-demand cooling scenarios such as towing, off-road recovery operations, or sustained uphill driving where consistent radiator performance is critical.

This 18-inch stainless fan is suited for operators and enthusiasts who prioritize reliability and efficiency in engine cooling systems. Whether managing thermal loads during heavy-duty patrol, extended range training at remote locations, or off-grid operational vehicles, the DERALE mechanical fan eliminates electronic failure points while delivering consistent cooling capacity. The universal mounting pattern simplifies integration into retrofit projects and aftermarket cooling system upgrades where OEM fans fall short of operational demands.

Flex-fan technology has been industry standard for decades in high-performance and commercial applications because it solves the core thermal management problem: conventional fixed-pitch fans waste horsepower at cruise while struggling to shed heat at idle. The DERALE 19118 addresses this by automating blade pitch, allowing a single fan to perform across the full operating range. For buyers seeking a durable, low-maintenance cooling solution with proven field reliability, this 18-inch stainless model offers straightforward mechanical performance with no complex controls to fail.