High-Performance & Small Diameter Ropes · Gustav Wolf
PAWO F7S — High-Performance Steel-Core
8×19 Warrington on an IWRC heart — stability under duty.
PAWO F7S puts a Warrington 8×19 outer over an independent wire rope core (IWRC) at 1570 N/mm² grade — the stock designation reads 8×19W-IWRC 1570 U sZ. The steel heart adds strength, crush resistance and dimensional stability where fibre cores run out of headroom.
Stock position
Stocked at 8 mm in volume (7,800+ metres at last count); other F-series diameters quoted with Gustav Wolf support.
Specification
| Construction | 8×19 Warrington (W) |
| Core | IWRC — independent wire rope core |
| Grade | 1570 N/mm² |
| Finish · lay | U (bright) · sZ — right ordinary lay |
| Stocked | 8 mm (others in the F-series to order) |
| Standards | ISO 4344 · EN 12385-5 |
| Duty | High-duty suspension, MRL and high-rise packages |
Breaking forces and full mechanical properties are stated on the certificate issued with each rope — supplied against the applicable standard, never quoted generically.
High duty asks questions fibre cores answer poorly: heavier cars, taller travels, tighter stretch budgets. An IWRC is a rope within the rope — it holds diameter under groove pressure, trims constructional stretch, and carries load the strands alone cannot.
F7S is our stocked high-performance steel-core line (8 mm on the shelf in quantity), with the wider F-series available against specification. If you are speccing an MRL package or replacing a steel-core original, this is the family.
Why this line
- Steel heart: crush resistance and diameter stability in the groove
- Lower constructional stretch — fewer shortening visits on tall travels
- Warrington outers balance flexibility and wear
Typical applications
- Machine-room-less packages specifying steel-core rope
- High-rise and high-duty traction installations
- Steel-core originals at re-rope
Can I substitute F7S for a fibre-core original?
Not casually — core type changes stretch, diameter behaviour and sometimes traction. Where an upgrade is genuinely wanted, it is an engineered decision our technical team confirms against the installation, not a like-for-like swap.
Lift Industry Specialists
Need PAWO F7S priced?
Diameter, length, terminations and delivery point — that's all a quotation needs. Same-day answers from the works.