HD Flex Fan 17in. Standard Rotation

The PERMA-COOL HD Flex Fan 17in. Standard Rotation is a heavy-duty mechanical cooling fan engineered for vehicles and equipment requiring reliable thermal management in demanding conditions. Designed with a universal bolt pattern and 5/8-inch pilot shaft, this fan delivers consistent airflow performance across a wide range of applications, from tactical vehicles to industrial cooling systems. The 17-inch diameter blade assembly provides optimal air displacement while maintaining a compact footprint suitable for space-constrained engine compartments.

Constructed with a durable steel hub and six stainless steel blades, the HD Flex Fan combines strength with corrosion resistance—critical in marine, off-road, and high-moisture environments where standard fans degrade rapidly. The polished and black center hub design reduces vibration and improves longevity under continuous operation, while the stainless blade composition resists rust and oxidation. Standard rotation ensures compatibility with conventional cooling system configurations, and the mechanical operation eliminates dependence on electronic controls or fluid coupling failures, providing reliability when electric fans may falter.

This fan is ideal for personnel operating tactical vehicles, expedition rigs, and equipment where mechanical simplicity and field reliability outweigh electronic complexity. Law enforcement and military operators benefit from the universal mounting pattern, which accommodates non-standard engine configurations and retrofit installations. Weighing just 2.75 pounds, the assembly adds minimal parasitic load while delivering substantial cooling capacity—making it a preferred choice for engine builders, field mechanics, and anyone requiring a proven, maintenance-friendly alternative to electronic cooling solutions.