Rope Fleeting Angles


The fleet angle Ø, as displayed in FIGURE 2, governs the position of the lead sheave with respect to the drum. When the rope is at one end of the drum, against the drum flange, this fleet angle may not exceed one and a half degrees (1.5˚) for plain drums to two degrees (2˚) for grooved drums left or right from the centre line passing through the centre of the sheave groove and the midpoint of the drum.
The midpoint of the drum is donated by distance LD in FIGURE 2.

FIGURE 2: Fleet angle between the centre of the sheave groove and the midpoint of the drum.

Fleet angles larger than these suggested parameters can cause bad rope winding on drums and the rope can rub against the flanges of the sheave groove.
A safe rule of thumb that can be used is to multiply the length of the drum by 16.
This will be equivalent to the distance LS that the lead sheave needs to be away from the winch.
This distance will automatically result in a fleet angle of between 1.5 – 2˚.


It is recommended that sheaves operate centre line to centre line where possible.
The fleet angle Ø between two sheaves can be up to 2.5˚ left or right of the centre line passing through the centre of each sheave groove.
Refer to FIGURE 3 for an illustration of this.

FIGURE 3: Illustration of the fleet angle between the centres of two sheaves.



Leave a Replay

Related Posts

mill rotation winch

Dymot Mill Rotation Winches

When installing ball mills the installation is complex as an unbalanced loading due to liners and rotors make handling this heavy equipment challenging. This system

Dymot Conveyor Belt Pulling Winches

Conveyor Belts are fast becoming longer, wider and heavier. Dymot offers a range of Belt Puling Winches for this exact need. Dymot‘s Belt pulling Winches

Dymot Dual Rope Brake Capstan

Dymot Engineering Company was part of a Major Project in Peru to develop and Manufacture one of the largest Dual Braked Capstans to lock in

get all our latest news and posts

Subscribe to our newsletter

Scroll Up