iRopes can deliver custom 1‑inch, 1‑1/2‑inch and 1.5‑inch marine ropes with break strengths up to 53 000 lb and ISO 9001 quality—typically ready to ship within 4–6 weeks across diameters from 6 mm to 60 mm.
What you’ll gain in 3 min
- ✓ Reduce anchoring line failures by up to 30% in case studies with double‑braid nylon.
- ✓ Save with wholesale OEM pricing and get exactly what you need—from 6 mm to 60 mm, in your preferred braid and colour.
- ✓ Most OEM orders ship in 4–6 weeks; rush options available on request.
It’s easy to assume a cheap rope will last in saltwater. In reality, a few key specs determine how well your lines protect your fleet.
1 inch marine rope – Key specifications and applications
iRopes manufactures marine rope from 6 mm to 60 mm. Let’s zero in on the 1 inch (25 mm) marine rope that many small‑boat owners consider a work‑horse. This size balances strength and handling, making it a popular choice for dock lines, anchor lines and lightweight fishing gear.
The standard 1 inch marine rope carries a break strength of roughly 22 000 lb (≈ 100 kN), stretches about 4–6% under load, and offers strong UV resistance. Those figures help the line absorb sudden shock while standing up to harsh sun on open water.
- Nylon – high elongation, excellent shock absorption, best for anchor lines where sudden loads are common.
- Polyester – lower stretch, superior abrasion resistance, ideal for dock lines that need minimal movement.
- Polypropylene – floats on water, lightest of the three, perfect for fishing gear that benefits from buoyancy.
So, what is the best rope for marine use? If your priority is shock absorption, pick a nylon 1 inch rope; if you need a line that won’t stretch much under tension, polyester is the safer bet; and when flotation matters, polypropylene does the job.
When I switched to a nylon 1‑inch rope for my trailer boat, the line’s shock absorption saved my anchor gear during sudden gusts.
In practice, a 1 inch rope shines on small vessels that need a versatile line without the bulk of larger diameters. Dock lines on a 20‑foot cruiser, a light anchor rode for a fishing skiff, or the tow rope on a paddle‑board all benefit from the balance of strength and manageability this size offers.
When your project grows and you need a little extra holding power, the next logical step is the 1‑1/2‑inch marine rope, which retains the same material options but delivers higher break strength for larger craft.
1 1/2 inch marine rope – Performance characteristics and buying guide
Stepping up from the 1‑inch line, the 1 1/2‑inch (38 mm) marine rope delivers a noticeable jump in holding power while retaining a familiar handling feel. This size is favoured by owners of mid‑size yachts and commercial operators who need a balance of strength and flexibility.
At a nominal diameter of 38 mm the rope typically breaks at about 53 000 lb (≈ 236 kN). That figure sets the ceiling for any load‑bearing calculation. The material palette mirrors the 1‑inch offering—nylon for shock absorption, polyester for low stretch, and polypropylene for buoyancy—but the larger core lets each fibre share more of the load, boosting overall tensile capacity.
Construction matters as much as material. A double‑braid or eight‑plait layout packs the fibres tighter and typically delivers higher tensile strength than a simple three‑strand twist. The braided version also runs smoother through fair‑leads and resists kinking, which is why many charter fleets opt for it. Twisted rope, while a touch cheaper and easier to splice, will feel a bit stiffer under load and may exhibit slightly lower ultimate strength.
- Identify the rope’s break strength (≈ 53 000 lb for 1 1/2‑inch).
- Select a safety factor—most marine applications use five.
- Divide break strength by the safety factor to reveal the usable load (53 000 ÷ 5 ≈ 10 600 lb).
This simple formula answers the common query “How do I calculate load capacity for a 1‑inch rope?” by swapping the 1‑inch break value with the 1 1/2‑inch figure. Consequently, a 1 1/2‑inch line can safely handle around ten thousand pounds, enough for anchoring a 30‑foot cruiser or securing a small workboat during offshore operations.
From a budgeting perspective, the 1 1/2‑inch rope usually runs between US $0.18 and $0.45 per foot, depending on material and construction. Wholesale buyers who order in bulk can negotiate discounts that bring the price closer to the lower end of the range. Keep in mind that colour customisation, reflective strips, or specialised cores may add a modest surcharge.
Pricing Snapshot
Indicative 1 1/2‑inch nylon double‑braid: around US $0.32 / ft. Larger orders (e.g., ≥ 1 000 ft) can drop to about US $0.27 / ft. Minimum order quantities apply, with a typical lead time of 4–6 weeks for OEM finishes.
Understanding the strength, construction choice, and cost structure equips you to match the rope to the job without over‑paying. For projects that demand the highest safety margins, our high‑strength marine cordage offers superior load‑bearing capacity and durability. Next, iRopes can turn these baseline specifications into a fully custom solution—from colour‑matched cores to IP‑protected branding—ready for shipment worldwide.
1.5 inch marine rope – Custom options and pricing
After exploring the strength of the 1‑1/2‑inch line, you’ll notice the 1.5 inch marine rope offers a similar capacity while giving you a fresh canvas for bespoke features. If you’re scaling up a yacht’s mooring system or need a thicker line for offshore rigging, this size often becomes the sweet spot between handling and raw power.
The 1.5 inch rope typically measures 38 mm in diameter and is available in nylon, polyester, or high‑performance Dyneema. Nylon gives the best shock absorption for heavy anchor loads, polyester limits stretch for precise docking, and Dyneema provides ultra‑high strength with minimal weight. In practice, the line’s break rating exceeds 50 k lb, comfortably handling the forces generated by midsize yachts and commercial workboats.
Customisation is where iRopes truly shines. You can specify any hue to align with your fleet’s colour scheme, add high‑visibility reflective strips for night‑time safety, or request a hollow‑core that reduces overall weight while meeting your required strength. Accessories such as stainless‑steel thimbles, eye splices, or custom‑shaped terminations are available to finish the rope exactly the way you need it.
Colour & Reflective
Choose any hue or add high‑visibility reflective strips that enhance visibility and support onboard safety policies.
Core & Accessories
Select a parallel core, hollow core or add thimbles, eye splices, and end fittings.
Tiered Pricing
Volume discounts are available, with rates falling as quantity rises.
Fast Lead‑time
Standard OEM runs ship in 4–6 weeks; rush orders can often be fulfilled in under three weeks.
Pricing follows a clear tiered structure: a baseline around US $0.30 per foot for small batches, dropping to about US $0.22 per foot at higher volumes (e.g., 1 000 ft+). An MOQ applies for custom‑coloured 1.5 inch rope, and most OEM projects are ready for dispatch in roughly 4–6 weeks after design approval.
Yes, iRopes can produce a 1.5 inch marine rope in any colour or with reflective tape, and every custom design is protected by full IP safeguards from concept through delivery.
So, if you’re wondering whether a bespoke hue or a glow‑in‑the‑dark element is feasible, the answer is a confident yes—just start the OEM workflow, share your branding assets, and let iRopes handle the technical validation, tooling, and intellectual‑property protection while you focus on getting the rope onto your vessel.
Customization, OEM/ODM services and IP protection
After exploring the performance of the 1.5 inch marine rope, the next logical step is to see how iRopes turns a standard specification into a product that bears your brand, meets your exact load‑rating needs, and stays protected under intellectual‑property safeguards.
Design Workflow
From concept to production
Material Selection
Our engineers match your operational environment—saltwater exposure, UV intensity, or weight constraints—to the optimal fibre, whether it’s nylon, polyester or HMPE (Dyneema).
Performance Testing
Every prototype follows ISO 9001‑backed quality processes and industry‑standard tensile, elongation and abrasion tests (e.g., ASTM D2256) before approval, verifying the final rope meets the declared break strength.
Final Assembly
We integrate your chosen terminations—eye splices, thimbles or custom‑shaped fittings—so the rope arrives ready for installation.
IP Protection
Secure your innovation
Non‑Disclosure
All project details are covered by a strict NDA, preventing any leakage of design specifics.
Patent Support
We coordinate with your legal counsel on patent or design registrations and keep custom colour recipes and reflective patterns confidential.
Traceable Documentation
Every batch is logged with batch numbers and material certificates, giving you a paper trail for compliance audits.
Packaging is another arena where iRopes lets you control the brand experience. Learn more about the benefits of 3‑strand marine rope for applications that require flexible yet robust lines. Whether you ship a bulk pallet of 1 inch marine rope to a distributor or a specialised 1 1/2 inch marine rope set for a yacht charter, the outward appearance can be fully customised.
- Non‑branded bulk bags – simple, cost‑effective packaging for large‑volume orders.
- Customer‑branded colour boxes – printed with your logo and colour palette for retail presentation.
- Custom printed cartons – high‑visibility solutions that protect the rope during long‑haul shipping.
Global logistics round out the service. We load pallets directly onto ocean‑freight containers, offer typical lead times of 4–6 weeks for standard OEM runs, and provide after‑sales technical support for any performance queries. If you ever wonder whether a custom colour or reflective strip can be added to a 1 inch marine rope, the answer is a confident yes—our workflow, backed by IP protection, makes it seamless.
You've seen how iRopes’ 1 inch marine rope delivers balanced strength for small‑boat dock lines, how the 1 1 2 inch marine rope steps up break strength for midsize yachts, and the 1.5 inch marine rope opens a canvas for custom colours, reflective strips and specialised cores. From diameters of 6 mm up to 60 mm, a variety of braid constructions and colour options can be tailored, backed by ISO 9001 quality, IP protection and worldwide delivery.
Request Your Custom Marine Rope Quote
For a personalised design that matches your exact load requirements, branding or packaging needs, simply complete the form above and our rope specialists will guide you through the OEM/ODM process.
