HTWR / Construction
1×7, 1×19, 7×7 and 7×19: how to read wire rope construction
Read strand and wire counts, then define bending and end-fitting requirements before selecting a construction.
Reference table
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| Construction | Arrangement | Total wires |
|---|---|---|
| 1×7 | 1 strand × 7 wires | 7 |
| 1×19 | 1 strand × 19 wires | 19 |
| 7×7 | 7 strands × 7 wires | 49 |
| 7×19 | 7 strands × 19 wires | 133 |
Counts are arithmetic descriptions of the named conventional arrangements. They do not identify every wire diameter, lay length, core option or compacted variant. Sources and scope ↗
Flexibility is a starting point, not the whole design
Single-strand products are generally used where limited flexibility is acceptable. A conventional 7×19 cable is a useful candidate for bending applications, but the actual sheave geometry, tension, travel and cycle requirements must be reviewed.
Compare complete specifications
Keep material, nominal diameter and acceptance criteria explicit when comparing constructions. Send end-fitting drawings too: changing construction may require a fresh review of termination compatibility and assembly testing.
Common questions
Does 7×19 mean a 7 mm rope?
No. It describes strand and wire arrangement. State nominal rope diameter separately, with units and tolerance.
Can construction alone predict bending life?
No. Define the bending geometry, load, motion and acceptance test for the specific assembly.
Sources and scope
Reference information supports specification discussions. Confirm the actual supplied product and acceptance criteria with the manufacturing team.