ISO 13733:2020 Roller Fairlead with Upper Roller

The ISO 13733:2020 Roller Fairlead with Upper Roller is a high-quality marine component designed to ensure smooth and controlled movement of ropes, cables, and mooring lines. This fairlead conforms to the ISO 13733:2020 standard, ensuring dimensional accuracy, material quality, and performance reliability. The inclusion of an upper roller provides additional support and reduces wear on the rope, making it ideal for demanding applications.  This fairlead is essential for maintaining proper rope alignment, preventing chafing and damage, and ensuring the safe and efficient operation of lifting and pulling systems.

Depending on the construction, universal fairleads shall be classified as belonging to one of the following four types:

• Type 4R: with one rope-passing opening;
• Type 5RL: with one rope-passing opening with an additional guide roller on the left side;
• Type 5RR: with one rope-passing opening with an additional guide roller on the right side;
• Type 7R: with two rope-passing openings.

Materials of ISO 13733:2020 Roller Fairlead with Upper Roller

The following materials are used for manufacturing the components of universal fairleads.

• Frame and other plates: weldable steel plates having a yield point of not less than 235 N/mm² except for the frames with a rope guide for nominal sizes 400A, 400B and 400C, which are made of weldable steel plates having a yield point of not less than 315 N/mm².
• Roller: weldable steel plates having a yield point of not less than 235 N/mm², except for the rollers for nominal sizes 400A,400B and 400C, which are made of weldable steel plates having a yield point of not less than 315 N/mm², or equivalent steel tubes.
• Axle: carbon steel having a yield point of not less than 345 N/mm².
• Bush: brass or bronze or equivalent.

Dimensions of ISO 13733:2020 Roller Fairlead with Upper Roller

Assembly of 4R universal fairleads

Key Structures

1. frame with rope guide
2. vertical rollers with housin gand washers
3. lower horizontal roller with washer
4. supper horizontal roller with washers
5. vertical axles with stopper
6. lower horizontal axle with stoppers
7. upper horizontal axle with stoppers
8. type 5RL
9. type 5RR

• a. Height of seat shall be determined in accordance with the hull construction design.
• b. For nominal size 250 and above
• c. For nominal size between 140 and 200 only
• d. Side shell

Assembly of 5RL and 5RR universal fairleads

Table 1—Dimensions of type 4R, 5RL and 5RR universal fairleads
Dimensions in millimeters
Nominal size Dn	B×H	D₁	D₂	h	h₁	h₂	b	b₁	b₂	b₃	b₄	W	C
140	195×150	139,8	114,3	277	130	480	335	515	656	820	140	260	150
160	200×150	165,2	114,3	290	145	515	365	570	730	920	140	310	175
180	200×150	190,7	139,8	315	155	560	391	620	800	1000	140	360	200
200	200×150	216,3	139,8	328	170	590	416	675	896	1110	140	410	225
250	250×200	267,4	165,2	416	195	715	517	825	1046	1270	180	520	280
300A	300×250	318,5	216,3	517	220	870	618	980	1206	1480	200	620	330
300B	300×250	318,5	216,3	517	220	870	618	980	1206	1480	200	620	330
400A	350×250	406,4	216,3	561	265	960	756	1210	1450	1750	200	795	420
400B	350×250	406,4	216,3	561	265	960	756	1210	1450	1750	200	795	420
400C	350×250	406,4	216,3	561	265	960	756	1210	1450	1750	200	795	420

Table2—Dimensions(continued) and SWL of type 4R, 5RL and 5RR universal fairleads
Dimensions in millimeters
Nominal size Dn	e	W₁	W₂	T	T₁	T₂	T₃	T₄	f	We leng Z₁	ing leg tha, b Z2	SWLC		Dimensions in millimeters
												kN	t	4R	5R
140	70	30	100	12	10	10	12	12	3	7	4	137	14	173	213
160	83	40	100	14	10	14	14	14	4	7	5	196	20	246	305
180	95	40	100	16	10	14	16	16	4	7	5	245	25	313	392
200	108	50	100	18	12	16	18	18	6	9	7	314	32	430	532
250	133	65	200	22	16	18	20	20	6	11	7	510	52	841	1031
300A	159	80	200	24	20	22	24	22	7	14	8	687	70	1364	1666
300B	159	80	200	26	22	24	24	22	8	15	9	736	75	1463	1786
400A	203	100	200	26	22	22	32	28	7	15	8	981	100	1971	2387
400B	203	100	200	28	24	26	32	28	8	17	9	1256	128	2240	2731
400C	203	100	200	30	26	28	32	28	8	18	9	1373	140	2395	2922
a. Welding with chamfering is available based on the same welding volume/strength. b. Welding otherwise than mentioned in the Figures in this document and this table: minimum leg length shall be 1/2 of thinner plate thickness. c. The SWLs shown in this table are for reference only. These are based on the loadings as mentioned in Annex A. The“SWL” which is marked on the fitting may be adjusted depending on the actual loading conditions of the mooring rope under the agreement between the user and the manufacturer. d. The calculated weight (mass)is for reference only excluding foundation.

Assembly of 7R universal fairleads

Key Structures

1. frame with rope guide
2. vertical rollers with housing and washers
3. lower horizontal roller with housing and washers
4. upper horizontal roller with housing and washers
5. vertical axles with stopper
6. lower horizontal axle with stoppers
7. upper horizontal axle with stoppers

• a. Height of seat shall be determined in accordance with the hull construction design.
• b. For nominal size 250 and above
• c. For nominal size between 140 and 200 only
• d. Side shell

Table 3—Dimensions of type 7R universal fairleads
Dimensions in millimeters
Nominal size Dn	B×H	D₁	D₂	h	h₁	h₂	b	b₁	b₂	b₃	b₄	W	C
140	195×150	1398	114.3	277	130	480	335	850	1000	1160	140	260	150
160	200×150	1652	1143	290	145	515	365	935	1100	1286	140	310	175
180	200×150	1907	1398	315	155	560	391	1011	1200	1400	140	360	200
200	200×150	2163	1398	328	170	590	416	1091	1320	1550	140	410	225
250	250×200	2674	1652	416	195	715	517	1342	1580	1820	180	520	280
300A	300×250	3185	2163	517	220	870	618	1598	1840	2150	200	620	330
300B	300×250	3185	2163	517	220	870	618	1598	1840	2150	200	620	330
400A	350×250	4064	2163	561	265	960	756	1966	2250	2550	200	795	420
400B	350×250	4064	2163	561	265	960	756	1966	2250	2550	200	795	420
400C	350×250	4064	2163	561	265	960	756	1966	2250	2550	200	795	420

Table 4—Dimensions(continued) and SWL of type 7R universal fairleads
Dimensions in millimeters
Nominal size Dn	e	W₁	W₂	T	T₁	T₂	T₃	T₄	f	Weld leng Z₁	ing leg tha, b Z2	SWLC		Calculated weightd
												kN	t	kg
140	70	30	100	12	12	18	12	12	6	9	7	137	14	276
160	83	40	100	14	14	20	14	14	6	10	7	196	20	398
180	95	40	100	16	16	28	16	16	8	11	9	245	25	547
200	108	50	100	18	18	28	18	18	8	13	9	314	32	713
250	133	65	200	22	26	36	20	20	10	18	10	510	52	1473
300A	159	80	200	24	28	46	24	22	10	20	10	687	70	2301
300B	159	80	200	26	30	48	24	22	10	21	10	736	75	2449
400A	203	100	200	26	30	40	32	28	10	21	10	981	100	3317
400B	203	100	200	28	32	52	32	28	10	22	10	1256	128	3767
400C	203	100	200	30	34	54	32	28	10	24	10	1373	140	4012
a. Welding with chamfering is available based on the same welding volume/strength. b. Welding otherwise than mentioned in the Figures in this document and this table: minimum leg length shall be 1/2 of the thinner plate thickness. c. The SWLs shown in this table are for reference only. These are based on the loadings as mentioned in Annex A. The“SWL” which is marked on the fitting may be adjusted depending on the actual loading conditions of mooring rope under the agreement between the user and the manufacturer. d. The calculated weight (mass)is for reference excluding foundation.

Features of ISO 13733:2020 Roller Fairlead with Upper Roller

• Compliant with ISO 13733:2020 Standards: Meets the latest global standards for marine fairleads, ensuring top-notch performance and safety.
• Dual Roller Design (with Upper Roller): The upper roller provides additional support and minimizes rope contact, reducing friction and wear, extending rope life, and improving overall system efficiency. This is especially beneficial for applications with high loads or frequent rope movement.
• High-Strength Materials: Constructed from corrosion-resistant and high-strength materials, ensuring long-lasting performance even in harsh marine environments.
• Durable & Low Maintenance: Built to withstand heavy-duty applications with minimal maintenance requirements, saving time and costs for operators.
• Versatile Mounting Options: Designed for easy installation and compatibility with various marine equipment, including winches, capstans, and mooring systems.
• Improved Rope Life: The roller system ensures reduced wear on ropes and cables, contributing to their extended lifespan.

Applications of ISO 13733:2020 Roller Fairlead with Upper Roller

• Marine Industry: Ideal for use in vessels, offshore platforms, and shipping operations, particularly for mooring lines, towing cables, and anchor handling.
• Offshore Oil & Gas Operations: Ensures smooth handling of cables and lines in challenging offshore environments.
• Commercial Shipping & Freight: Assists in secure rope management for loading, unloading, and towing operations.
• Harbor & Port Facilities: Enhances the safety and efficiency of mooring and docking procedures.

Why Choose Our ISO 13733:2020 Roller Fairlead with Upper Roller?

1. Increased Rope Lifespan: Reduces wear and tear on ropes, saving money on replacements.  
2. Improved Safety: Ensures proper rope handling, minimizing the risk of accidents.
3. Enhanced Efficiency: Facilitates smooth and efficient operation of lifting and pulling systems.  
4. Reduced Downtime: Durable construction and reliable performance minimize maintenance requirements.
5. Compliance with Standards: Meets ISO 13733:2020 standards, ensuring quality and interchangeability.

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