COMEUP Industrial Winch (Ver:03) - Manual (Page 7)

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Duty Cycle Ratings
All industrial winches are rated at S3 10%ED & 1min/10min rating intermittent periodic duty.
IV. Winching Principles
Calculating Fleet Angle
To obtain the best wire rope service, the direction of pull will be on a horizontal within ±3
degrees and perpendicular to be centerline of the winch drum within ±3 degrees. If the fleet
angle is bigger than the recommended angles, a good spooling cannot be obtained as the rope
will spoon on to one side of the rope drum.
Load Rating
Load and speed varies according to how much wire rope is on the drum. The first layer of
rope on the drum delivers the slowest speed and the maximum load. The top layer of rope on
the drum delivers the maximum speed and the minimum load.
For this reason, all industrial winches are rated at their first layer capacities.
According to EN 14492-1 Section 5.7.2, the flanged drum end plates shall protrude beyond
the rope wound on the drum at the top layer by at least 1.5 x the nominal rope diameter..