Allspars Marine and Architectural Rigging

In partnership with Ronstan

allspars

Architectural Rigging

Applications

Products

Specifications

Technical

TYPICAL STAINLESS STEEL WIRE ROPE BREAKING LOAD SPECIFICATIONS

		1 x 19				7 x 7				7 x 19
		Grade 304		Grade316		Grade 304		Grade 316		Grade304		Grade 316
WIRE DIAMETER		kg	lb	kg	lb	kg	lb	kg	lb	kg	lb	kg	lb
1.2mm	3/64 in.	170	370	110	240	122	270	87	190	122	270	83	180
1.6mm	1/16 in.	227	500	215	470	217	480	165	360	217	480	147	320
2.0mm	5/64in.	363	800	336	740	295	650	258	570	295	650	230	510
2.4mm	3/32 in.	545	1200	484	1060	417	920	332	730	417	920	323	710
3.2mm	1/8 in.	953	2100	861	1890	798	1760	652	1430	798	1760	602	1320
4.0mm	5/32 in.	1497	3290	1340	2950	1089	2400	1030	2270	1089	2400	956	2100
4.8mm	3/16 in.	2132	4690	1930	4250	1678	3690	1493	3280	1678	3690	1373	3020
5.5mm	7/32 in.	2858	6290	2540	5590	2268	4990	1950	4290	2268	4990	1807	3980
6.4mm	1/4 in.	3720	8180	3440	7570	2903	6390	2642	5810	2903	6390	2450	5590
7.2mm	9/32 in.	4718	10380	4350	9570	3523	7750	3353	7380	3528	7760	3031	6670
8.0mm	5/16 in.	5670	12470	5380	11840	4082	8980	4140	9110	4082	8980	3820	8400
9.5mm	3/8 in.	7938	17460	7580	16680	5443	11970	5830	12830	5443	11970	5388	11850
11.0mm	7/16 in.	10206	22450	10200	22440	7393	16260	7820	17200	7393	16260	7230	15910
12.7mm	1/2 in.	12799	28160	12101	26620	10342	22750	10900	23890	10342	22750	9628	21180
14.3mm	9/16 in.	16420	36120	14000	30800	12927	28440	13180	29000	12927	28440	12206	26850
16.0mm	5/8 in.	21320	46900	18399	40480	15876	34930	16500	36300	15876	34930	15300	33660
18.0mm	45/64in.					20192	44420	21000	46200	20192	44420	19300	42460
19.0mm	3/4 in.			21600	47520	22498	49500	23284	51220	22498	49500	21569	47450
20.0mm	25/32 in.					24928	54840	25800	56760	24928	54040	23900	52580
22.0mm	7/8 in.			29070	63950	30164	66360	31200	68640	30164	66360	28900	63580
25.4mm	1 in.			40600	89320					38737	85220	38642	85010
28.0mm	11/8 in.									48263	106180	46900	103180

STRETCH IN WIRE ROPES

Stretch is apparent in all wire ropes, initially as permanent stretch when the load is first applied and the individual wires bed down, and then as conventional elastic stretch within the wires. Where stretch is critical to the application, initial stretch can be accounted for with cables pretensioned or pre-stressed during swaging and cable manufacturing. Elastic stretch can be calculated by the following formula.
Elastic Stretch (mm) =
(W × L )/ (E × A)

Where:

W= Applied Load (kN)

L = Cable Length (mm)

E = Strand Modulas (kN/mm² )

A = Area of Cable = (D2 × ) / 4

1 x 19 107.5kN/mm² 15.59 × 10 exp 6 P.S.I.

7 x 7 57.3kN/mm² 8.31 × 10 exp 6 P.S.I.

7 x 19 47.5.5kN/mm² 6.89 × 10 exp 6 P.S.I.

SWAGING TO THE MILSPEC* STANDARD IMPERIAL WIRE AND TERMINALS

The swage portion of all Ronstan rigging products is manufactured to meet, or exceed, the United States of America *Military Specification, 'Milspec'.
Correct installation of a swage fitting requires that the shank of the fitting be formed down onto the wire with specialised dies and presses in accordance with the 'Milspec' dimensions.

Wire
Diameter

3/32 in.
2.4mm

1/8 in.
3.2mm

5/32 in.
4.0mm

3/16 in.
4.8mm

7/32 in.
5.6mm

1/4 in.
6.4mm

9/32 in.
7.1mm

5/16 in.
7.9mm

3/8 in.
9.5mm

7/16 in.
11.1mm

1/2 in.
12.7mm

9/16 in.
14.3mm

5/8 in.
15.9 in.

CODE No.

16 .

Bore
Diam. ID

2.77mm
0.109 in.

3.58mm
0.141 in.

4.37mm
0.172 in.

5.16mm
0.203 in.

5.94mm
0.234 in.

6.73mm
0.265 in.

7.54mm
0.297 in.

8.33mm
0.238 in.

9.91mm
0.390 in.

11.89mm
0.468 in.

13.49mm
0.531 in.

15.09mm
0.594 in.

16.66mm
0.656 in.

Length of wire
inside swage

32.0mm
1.26 in.

38.4mm
1.51 in.

44.7mm
1.76 in.

51.1mm
2.01 in.

57.4mm
2.26 in.

63.8mm
2.51 in.

70.1mm
2.76 in.

76.5mm
3.01 in.

89.2mm
3.51 in.

101.9mm
4.01 in.

119.3mm
4.70 in.

127.3mm
5.01 in.

140.0mm
5.51 in.

Diam. OD
before swaging

5.54mm
0.18 in.

6.35mm
0.250 in.

7.54mm
0.297 in.

9.12mm
0.359 in.

10.85mm
0.427 in.

12.55mm
0.494 in.

14.30mm
0.563 in.

16.13mm
0.635 in.

17.86mm
0.703 in.

19.84mm
0.781 in.

21.44mm
0.844 in.

24.99mm
0.94 in.

28.17mm
1.109 in.

Diam. OD
after swaging

4.83mm
.0.190 in

5.56mm
0.219 in.

6.35mm
0.250 in.

7.95mm
0.313 in.

9.53mm
0.375 in.

11.13mm
0.438 in.

12.70mm
0.500 in.

14.30mm
0.563in.

15.88mm
0.625 in.

17.48mm
.0.688 in

19.05mm
0.750 in.

22.23mm
0.875 in.

25.40mm
1.000 in.

Tolerance on 0D

+0, -0.13mm
5+0, -0.005 in.

+0, -0.18 mm
+0, -0.007 in.

+0, -0.20mm
+0, -0.008 in.

+0, -0.23mm
+0, -0.009 in.

+0, -0.25mm
+0, -0.010 in.

* As specified in Milspec MS21260 and MS20668

SWAGING DIMENSIONS** METRIC WIRE AND TERMINALS

Wire Diameter	3.0mm 0.118in.	4.0mm 0.157in.	5.0mm 0.197in.	6.0mm 0.236 in.	7.0mm 0.276in.	8.0mm 0.315in.	10.0mm 0.394in.
CODE No.	3M	4M	5M	6M	7M	8M	10M
Bore Diameter ID	3.40mm .134 in.	4.40mm .173 in.	5.40mm .213 in.	6.40mm .252 in.	7.40mm .291 in.	8.40mm .331 in.	10.40mm .409in.
Length of Wire inside swage	38.4mm . 1.512 in	44.8mm 1.764 in.	51.1mm 2.012 in.	63.8mm 2.512 in.	70.2mm 2.764 in.	76.5mm 3.012 in.	89.2mm 3.512 in.
Diameter 0D Before swaging	6.35mm .250 in.	7.54mm .297 in.	9.12mm .359 in.	12.54mm .494in.	14.30mm .563 in.	16.13mm .635 in.	17.85mm .703 in.
Diameter 0D After swaging	5.56mm .219 in.	6.35mm .250 in.	7.95mm .313 in	11.12mm .438 in.	12.70mm .500 in.	14.30mm .563 in.	15.90mm .626in.
Tolerance on 0D	+0, -0.13 +0, -0.005			+0, -0.18 +0, -0.007	+0, -0.20 +0, -0.008

LOAD RATINGS & SAFETY FACTOR

Breaking Loads (B.L.) are the typical loads at, or around, which failure can be expected to occur with new product. A factor of safety should be applied to the Breaking Load figures to suit each application. The factor of safety should allow for safety implications, service life, fatigue (including cyclic nature of loading and stresses), type of load and corrosion etc. Optional proof load testing of batch sampling can be ordered.