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Determining “Duty Cycle”

This is commonly referred to as the expected “DUTY CYCLE” of the crane. Duty cycle means how often any crane is used during a 24 hour period.

  • How often it would be used during a 1 hour time period?
  • What type of work is the crane doing? — although an end user might only be occasionally using their crane, which means an ET Series crane would work, sometimes the job would require that the crane winch be running longer than a couple of minutes continuously, which would require a fully-hydraulic crane. Pulling underground water pumps would be the application that this situation will occur the most. Because the load is possibly being hauled up a long distance from below ground, a hydraulic winch, like those on the HT series cranes is a better fit for the job, even if the crane is only used occasionally.

HT / Full-Hydraulic Telescopic Cranes

  • HT25KX up to the HT66KX (5,000 LBS – 11,000 LBS)
  • Designed to be continuous-duty-use or for long lifts, such as lifting a water pumps from underground up to the surface.
  • Offer proportional control which means the operator has the ability to vary the speed of any crane function as he is using it, which allows the operator to “feather the movements” when needed.  (Such as delicate placement of large water pumps back in place or working on replacing a transmission on a piece of equipment in the field.)
  • Proportional-control HT cranes include full-power boom extension. Non-proportional HT cranes have power boom extension with a 4 FT manual pullout as well as single “ON-OFF” function switches.

ET / Electric-Hydraulic Telescopic Cranes

  • ET6K up to the ET36KX (2,000 LBS – 6,000 LBS)
  • Designed with electric winch motors to lift loads which are designed for “intermittent duty” or “occasional use” cranes.
  • Each individual crane’s electric winch will have a different constant run time allowed, but most of them are between 1.5 – 3 minutes running continuously.
  • These winches are not designed to be used more than a total of 10-15 minutes of use during any given hour. Operator controlled crane functions on the ET and Mast Cranes are either in the “ON or OFF” position.  NOTE: The ET12KXP is the exception with proportional controls.
  • ET and Mast Cranes have a variety of booms that are either partially powered out and then manual, or completely manual, except the ET25KXX, ET30KXX and ET36KX which have full-powered boom extensions.

CE/CT/VC Electric Mast & Van Cranes

  • CE1500FB up to the CT310KX (1,500 LBS – 2,000 LBS) & VC750FB up to the VC1000 (750 LBS – 1,000 LBS)
  • Designed with electric winch motors to lift loads which are designed for “intermittent duty” or “occasional use” cranes.
  • Each individual crane’s electric winch will have a different constant run time allowed, but most of them are between 1.5 – 3 minutes running continuously.
  • These winches are not designed to be used more than a total of 10-15 minutes of use during any given hour. Operator controlled crane functions on the Mast Cranes are either in the “ON or OFF” position.
  • A majority of Mast Cranes include manual rotation, elevation and manual boom extension.  The CT310KX includes power rotation, elevation and boom extension.