DYFORM®

The High-Tech Low Stretch Wire Rigging for Yachts & Dinghies

DYFORM is the high performance wire strand which gives a higher modulus of elasticity, offering the user less stretch and greater strength when compared with conventional wire of similar size.

Developed by Bridon Plc., the world's leading rope maker, it is backed by years of technical know-how and the famous Norseman name. This wire strand has always been in great demand and is an essential performance requirement on many racing craft and cruising yachts seeking higher performance and greater margins of safety.

The cross section shows how the unique DYFORM process creates specially shaped wires which fill a greater proportion of the strand cross section. This means a high breaking load and more resistance to stretch (a higher modulus of elasticity).

With just a 7 wire construction this version has virtually no constructional stretch. Comparison between a 3mm diameter 1 x 7 DYFORM and 3mm diameter 1 x 19 conventional strand with equivalent tensile loads, shows a difference in apparent elastic modulus:-

3mm 1 x 7 wire DYFORM	14.01 x 10³KGmm²
3mm 1 x 19 conventional	10.96 x 10³KGmm²

DYFORM 1 x 19 for Yachts
1 x 19 for Yachts

DYFORM 1 x 7 for Dinghies
1 x 7 for Dinghies

DYFORM Features

More than 30% increase in breaking strength.
Approved for use with conventional type swage and swageless fittings.
The ideal low stretch rigging for restricted design yachts which only permit 1 x 19 rigging.
Provides the corrosion resistance of marine grade 316S31 stainless steel.
Smoother surface gives lower aerodynamic drag.

DYFORM & Conventional Wire Comparison
Nominal Diameter	Part No.	Minimum Breaking Load		Approximate Weight		Minimum Breaking Load
(mm)		(kg)	(lb)	(kg/100m)	(lb/100ft)	(kg)	(lb)
	DYFORM 1 x 7					Conventional 1 x 19
2.5	D07-025	690	1518	3.40	2.28	500	1100
3	D07-030	1000	2200	4.90	3.28	720	1584
3.5	D07-035	1350	2970	6.70	4.49
4	D07-040	1780	3916	8.80	5.91	1280	2816
	DYFORM 1 x 19					Conventional 1 x 19
5	D19-050	2440	5368	13.50	9.10	2000	4400
6	D19-060	3550	7810	19.40	13.00	2880	6336
7	D19-070	4910	10802	26.00	17.40	3550	7810
8	D19-080	6150	13530	34.50	23.20	4640	10208
10	D19-100	9770	21494	54.00	36.30	7250	15950
12	D19-120	14400	31746	80.70	54.20	10400	22880
*14	D19-140	19300	42460	115.00	77.30	14180	31196
*16	D19-160	25600	56320	147.00	98.80	18560	40832
#19	D19-190	32000	70400	206.60	138.00	21620	47576
* 14mm & 16mm Dyform are 1 x 25 Construction # 19mm Dyform is 1 x 31 Construction