1x7 / 1x19 Steel Wire Rope

Specification:ASTM A475  Hot Dip Galvanized Strands
Nominal Diameter	Construction	Nominal Diameter of Wires	Approx Weight		Minimum Breaking Strength(kn)		Weight of Zinc Coating (Grade A)
			Ib/ft	kg/1000'	High Strength	Extra High Strength
in		in			Ib	Ib	oz/sq.ft	g/sq.m
1/8	1X7	0.041	0.032	14.5	1330	1830	0.40	122
5/32	1X7	0.052	0.051	23	2140	2940	0.40	122
3/16	1X7	0.062	0.073	33	2850	3990	0.50	153
7/32	1X7	0.072	0.098	45	3850	5400	0.50	153
1/4	1X7	0.080	0.121	55	4750	6650	0.60	183
9/32	1X7	0.093	0.164	74	6400	8950	0.70	214
5/16	1X7	0.109	0.205	93	8000	11200	0.80	244
3/8	1X7	0.120	0.273	124	10800	15400	0.80	244
7/16	1X7	0.145	0.399	181	14500	20800	0.90	275
1/2	1X7	0.165	0.517	235	18800	26900	0.90	275
1/2	1X7	0.100	0.504	229	19100	26700	0.70	214
9/16	1×19	0.113	0.637	289	24100	33700	0.80	244
5/8	1X19	0.125	0.796	362	28100	40200	0.85	259
Note: Stainless Steel Wire Rope is available.

Product Overview

It offers two configurations: 1×7 (7 wires twisted into one strand) for maximum strength, and 1×19 (19 wires twisted into one strand) for balanced strength and slight flexibility. Available in diameters from 2 mm to 30 mm, it provides tensile strength of 1670 MPa to 2160 MPa, complying with ISO 9001 and DIN 3060 standards. Unlike multi-strand ropes, its single-strand design eliminates inter-strand friction, ensuring uniform load distribution and high resistance to kinking. This rope is ideal for fixed applications (e.g., guy wires, structural supports) where rigidity and dimensional stability are prioritized over flexibility.

Product Features

Single-Strand Structural Benefits

• High Rigidity: Single-strand design (1×7/1×19) delivers 50% higher rigidity than multi-strand ropes, preventing bending or sagging in fixed applications (e.g., antenna guy wires).

• Uniform Load Distribution: No inter-strand gaps mean load is evenly spread across all wires, reducing stress concentration and minimizing wire breakage risk by 35%.

Configuration-Specific Performance

• 1×7 Variant: 7 thick wires maximize tensile strength (up to 2160 MPa), suitable for heavy fixed loads (e.g., bridge guy wires, industrial structural supports) where flexibility is not required.

• 1×19 Variant: 19 thinner wires add slight flexibility (bendable around pulleys ≥30× rope diameter), making it ideal for semi-fixed applications (e.g., garage door cables, lightweight rigging).

Applications

Fixed Structural Supports

1×7 (8-30 mm diameter) is used as guy wires for antennas, transmission towers, and bridge cable stays—its rigidity prevents tower sway in high winds, and high tensile strength supports structural loads (up to 50 tons).

Semi-Fixed Mechanical Uses

1×19 (2-16 mm) powers garage door lift cables, small boat rigging, and manual winches (for light loads, ≤5 tons)—its slight flexibility allows smooth spooling on small drums, while single-strand design resists kinking in repeated use.

FAQ

Can 1×7 rope be used for dynamic lifting?

No—1×7’s high rigidity makes it unsuitable for dynamic bending (e.g., crane hoists); choose 1×19 for semi-dynamic uses, or multi-strand ropes for full dynamic lifting.

What is the breaking load of a 10 mm 1×7 rope?

At 2160 MPa tensile strength, the 10 mm 1×7 rope has a minimum breaking load of 380 kN, suitable for 76 kN safe working load (5:1 safety factor) in fixed supports.

How to prevent corrosion in outdoor use?

Hot-dip galvanization or PVC coating is recommended—galvanized 1×7 rope offers 5+ years of service life in outdoor environments (e.g., tower guy wires), while PVC coating adds UV resistance for desert or coastal areas.