Steel Wire Rope for Cranes

Description:

The steel wire rope used for cranes are commonly the smooth or galvanized wire ropes with diameters from 6 to 70 mm. The structure can be:

6-strand wire rope: such as 6×37 structure (moderate flexibility), 6×19 (high strength but poor flexibility, mostly used for cable wind ropes), 6×61 (good flexibility and low strength, suitable for slings).
‌8-strand wire rope: such as 8×K26WS-EPIWRC (special-shaped strand surface contact), the advantages are high breaking force and strong resistance to bending fatigue, recommended for high-efficiency cranes.
‌Rope core type:
- ‌Hemp core/fiber core (FC): good flexibility, oil-lubricated steel wire, suitable for general environment;
- ‌Steel core (IWR/IWS): resistant to high temperature and high pressure, strong resistance to extrusion.

How to Choose the Wire Ropes?

‌Safety factor matching‌
- Lifting equipment: safety factor ≥5–6 times (such as bridge cranes, tower cranes);
- Slings/binding: safety factor ≥6–8 times (anti-impact load).
- Calculation basis: minimum breaking force = maximum load × safety factor.
Structure to match working conditions
- High strength, wear resistance: 6×19
- Frequent bending (such as lifting mechanism): 6×37 or 6×61
- Anti-rotation (multi-layer winding): 18×7, 35W×7 multi-layer strand structure
- High breaking force: 8×K26WS surface contact rope
Rope core and coating selection
- High temperature environment: asbestos core (hemp core is prohibited);
- Wet/corrosive environment: galvanized rope or plastic-coated rope;
- Heavy pressure scene: steel core (IWR/IWS);
- General scene: hemp core (FC, oil-lubricated).
Examples
- High-temperature molten metal lifting: Asbestos core steel wire rope (high temperature resistance ≥ 300℃)
- Port machinery/frequent amplitude change: 6×37+FC (good flexibility) or 8-strand surface contact rope (fatigue resistance)
- Precision equipment lifting: Non-metallic coated rope (anti-scratch)
- Open-air corrosive environment: Galvanized steel wire rope (anti-corrosion grade AB)
- Inclined shaft winch/heavy load lifting: 6×36WS+IWR (anti-extrusion) or 6×19S+FC (line contact)

Why Sinomac?

Professional Equipment Manufacturer
- Sinomac is a professional hoist and crane manufacturer. We only select quality components for our equipment. Wire ropes quality is the top concern.
Reliable Quality Assurance
- Every batch of wire rope from Sinomac undergoes strict quality control and testing, ensuring compliance with international standards for tensile strength, flexibility, and corrosion resistance.
Wide Range of Specifications
- We offer a comprehensive selection of wire rope types, sizes, and constructions—galvanized, stainless steel, compacted, and rotation-resistant—to meet diverse industrial demands.
Customized Solutions
- Tailored rope configurations, cut-to-length services, and end fittings are available to match specific application requirements, from cranes and elevators to marine and mining use.
Competitive Pricing & Fast Delivery
- With efficient production and logistics systems, we offer cost-effective pricing and prompt delivery to keep your projects on schedule.