Lifting Systems
Depending on the user's needs and the weight of the load to be handled, wire ropes with 1, 2, 3 or 4 arms, without any end fittings or can be provided at the ends with various types of links, shackles and hooks.
All slings and sets are provided with an identification tag which states all required information (W.L.L., number of legs, leg’s length, serial number, harmonised standard, CE mark) and a Declaration of Conformity.
Wire rope slings made by PROlift have CE (European Machinery Directive) type approval!
Manufactured according to EN 13414-1 and EN 13411-3 standards, they are available as not galvanised (uncoated), lubricated not galvanised or galvanised, for different wire rope constructions and diameters.
Efficiency rating of end terminations
Efficiency of termination is a subunit parameter that determines the loss of work load compared to the theoretical maximum due to wire rope processing or the use of specific end accessories.
Efficiency of an end termination is directly proportional with breaking load force of wire rope used.
See below some commonly used end processes and accessories:
- wire rope fixed with wire clips: efficiency rating 80% (by this process 20% of the theoretical maximum load is lost)
- braided (hand spliced) wire rope: efficiency rating 80% (by this process 20% of the theoretical maximum load is lost)
- swaged (mechanical sleeve) wire rope: efficiency rating 90% (by this process 10% of the theoretical maximum load is lost)
- swaged (mechanical clamped) with Flemish Eye splicing wire rope: efficiency rating ~96% (by this process 4% of the theoretical maximum load is lost)
- wire rope fixed with spelter socket and resin: efficiency rating 100% (by this process none of the theoretical maximum load is lost)
- wire rope fixed with wedge socket: efficiency rating 80% (by this process 20% of the theoretical maximum load is lost)
It is very clear that braiding / hand-splicing is a process inferior to mechanical sleeve (clamping).
Thus, using the same wire rope, by mechanical swaging (hydraulic clamping) we get a maximum workload about 11% higher than braiding the same cable. Moreover, if we use the method Flemish Eye, we get an even higher maximum workload.