A winding highway takes a turnA winding highway takes a turn

On-Highway Drives Arctis Two-Speed Fan Clutches

Arctis Two-Speed Fan Drive

Arctis Two-Speed Fan Clutches offer a better, more efficient cooling solution for on- and off-highway vehicles without ram air. Rigorously tested, Arctis Two-Speed Fan Clutches 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 Clutches are powered by eddy current—turning the fan at a lower speed. When additional cooling is needed, the Arctis Two-Speed spring actuates and runs the fan at full input speed.


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


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]

Features & Benefits

  • ECM control allows precision cooling of hotter running, emissions reduced engines
  • Up to 80% reduction in fan engagement cycles for reduces noise, conserves fuel and increase available horsepower
  • Less slip at engagement and premium bearing provide longer friction liner life, increased reliability and long life
  • Easy installation and maintenance
  • Design allows faster engine warm-ups in cold weather for operational efficiency
  • Ability to drive larger fans at higher ratios for a range of applications

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