99
GENERAL
When it is manufactured , the rope receives considerable
A
winch’s safety and correct operation largely depends on greasing that must be regularly renewed .
The ropes may the rope end on the winch and the load .
It is best to have an therefore be re-greased in view of their use , particularly along expert check the rope ends and the ropes themselves .
The rope the areas subject to bending .
end illustrated bellow is one of the authorised ends for lifting .
However , bear in mind that crimping also causes 10% loss of breaking load .
x Rope re-greasing x Rope ends x Inspections x Calculation of traction forces Daily visual inspection .
Periodical inspections by qualified persons depending on the conditions and time of use of the apparatus , its type and its classification .
Special inspections if the lifting apparatus is out of service for 3 months or more , or after damage to the rope or attachment points .
If , for operational reasons , re-greasing cannot be carried out , the rope life will be shortened and inspections must be made more frequently .
The influence of greasing and re-greasing on the life span is illustrated here : End prohibited when lifting .
The rope holders may in no case be used as rope endings in «lifting» .
« Talurit » crimping with tag Source : Lifting accessories ,
INRS
Examples of a few possible defects associated with the ropes (non-exhaustive list) : “Corkscrew” deformation “Basket” deformation Strand extrusion External wear Weight 90° 30° 20° 10° Weight 1.8
Winch force Winch force Winch force Winch force Weight 2.6
Weight 5.6
Weight 20 100 200 300 400 500 200 150 100 50 0 Greased and re-greased Greased No greased Tension constraint [
N
/ mm ] 2 Number of cycles ~ [ % ]