Arctis Two-Speed Fan Drives

Less noise. Exceptional efficiency.

Arctis Two-Speed Fan Drives offer a better, more efficient cooling solution for on- and off-highway vehicles without ram air. Rigorously tested, Arctis Two-Speed Fan Drives are engineered for reliability and long operating life in the highest-heat under-hood conditions.

The Arctis Two-Speed alternates between eddy current and spring-actuated cooling for precise, highly efficient temperature control and superior horsepower performance. Under most operating conditions, the Arctis Two-Speed Fan Drives are powered by eddy current—turning the fan at a lower speed. This reduces operating noise, increases available horsepower for auxiliary systems, and minimizes radiator abrasion from dust and debris. When additional cooling is needed, the Arctis Two-Speed spring actuates and runs the fan at full input speed.


  • 80% reduction in fan engagement cycles for improved fan drive, belt and tensioner reliability
  • 85% reduction in full-speed operation for better fuel economy
  • Reduced operating noise
  • Increased available horsepower
  • Precision engine temperature control
  • Quick response to cooling needs
  • More efficient cooling
  • Less slip at engagement for longer friction liner life
  • Increased reliability
  • Easy installation and maintenance
  • Faster engine warm-ups in cold weather
  • Reduced radiator clogging and abrasion


  • Highest torque to date—2,700 in.-lbs. [305 N-m]
  • Larger air chamber for full disengagement
  • Ability to drive larger fans at higher ratios
  • Superior bearing technology for maximum reliability
  • Pneumatic control
  • Simple control via solenoid valve


  • Medium-duty trucks
  • Buses
  • Severe-service vehicles
  • Rear-engine cement mixers
  • Other on- and off-highway equipment with little to no ram air


Actuation: Eddy current at low speed with spring lockup
Minimum air pressure to disengage: 90 psi [620.5 kPa]
Out-of-box torque: 2,700 in-lbs. [305 N-m]
Friction disc diameter: 7.9 in. [200.6 mm]
Fan blade capacity (diameter): Application specific
Engine horsepower range: 250–600 HP [186–447 kW]
Friction liner wear limit, minimum thickness: 0.23 in. [5.76 mm]

Related Products

  • DM Advantage Two-Speed Fan Drives
  • PolarForce Two-Speed Conversion Kits
  • WindMaster Fans


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