Services

Socket pouring

Resin sockets poured on tow pendants and wire rope assemblies, at the boat or in our Hatfield shop. We bring the rig to the dock, cut the old socket off, and pour a new one. No size limit, and a certificate with every pour.

01

We come to the boat

Most of this work is tugs. A tow pendant reaches its removal criteria, or a socket gets damaged, and the boat is tied up until it has a new termination on it.

Pulling the pendant off the vessel and shipping it somewhere to be re-socketed costs days. So we load the rig and go. We cut the old socket off on the dock, prepare the rope, pour the new socket, and the assembly goes back in service without the wire ever leaving the pier.

That is the whole reason this service exists. Everything else on this page is detail.

Where we go

Mid-Atlantic, and further on request

Philadelphia and the Delaware River, New York and New Jersey harbor, and the ports between them are the regular run. Further up or down the coast is a conversation, not a no.

What we can pour

No size limit we have hit

We have not run into a rope or socket we could not pour. Tell us the diameter, the construction and the socket you are using and we will tell you straight whether it is a problem.

What we pour with

Wirelock or Socketfast

Both, depending on the job. If your spec or the vessel's records call for one of them, say so when you call and that is what goes in the socket.

The Nelson socket pouring rig set up on a dock, with a tug and a barge tied up behind it and the service truck alongside
A closed spelter socket on a pendant slung from a web sling at the dock, water and a barge behind
02

Why a poured socket

Because of all the ways to put an end on a wire rope, this is the one that gives back the whole rope.

Terminations are rated by efficiency: how much of the rope's catalog breaking strength the finished end actually develops. A properly poured resin socket rates at 100%. A wedge socket is about 80%. Wire rope clips, correctly applied, are about 80%. Swaged sockets also reach 100%, but they need a press, which is exactly what you do not have on a pier.

On a tow pendant, that difference is not academic. The rope is sized for the pull. A termination that gives back four fifths of it has quietly resized the whole assembly.

A resin socket is also inspectable. The cone of resin and broomed wire sits in the basket where a surveyor can see it. There is no hidden swage and no set of clips to re-torque. When the assembly comes up for inspection, the termination is one of the easier parts of it to sign off.
03

How the pour actually goes

Nothing about this is quick, and that is the point. The socket is only as good as the preparation underneath it.

A technician winding seizing wire onto a wire rope at the neck of an open spelter socket, held in a bench vise

Cut and seize

The old socket comes off. The rope is measured and cut to the finished length, and the end is seized so the lay does not run back on itself once it is opened up.

Broom

The wires are unlaid back to the seizing and opened out into a broom: every wire in the rope separated, the core dealt with, the whole thing splayed so the resin can get around each individual wire. This is the part of the job that takes the time, and it is the part that decides whether the termination is worth its rating.

Clean

The broom is cleaned so nothing is left on the wire for the resin to fail to grip. Lubricant on the wire at this stage is what turns a 100% termination into an unknown one.

Seat and pour

The broom is drawn up into the socket basket, the socket is aligned with the rope axis and sealed, and the resin is mixed and poured in one go. Then it cures, which happens on its own schedule and cannot be rushed.

Resin being poured from a mixing pail into the basket of an open spelter socket at the dock
A technician pouring resin into a socket held upright in a bench vise in the Hatfield shop
A wire rope end opened into a broom, every wire separated above the seizing, ready for cleaning and pouring
Two Nelson technicians preparing broomed rope ends side by side on the bench outside the Hatfield shop
04

Every pour runs off a checklist

Nothing above is done from memory. A twenty-five point sheet is filled out on the job, signed by the inspector, and kept with the assembly's paperwork.

Nelson Rigging Services, LLC

Maritime socket pours are performed by Nelson Rigging Services, LLC, our separate entity for this work. Same people, same shop in Hatfield, same standards. The checklist below is theirs, and a completed copy goes out with every pour.

What gets checked, and when

01

Before the pour

Nine items, covering the parts of the job that cannot be corrected once the resin is in.

  • Rope verified against the job spec: diameter, construction and lay
  • Socket size and type matched to the rope and its load rating
  • Socket clean, dry, free of debris and rust
  • End broomed to spec, photographed before it goes up
  • Rope centerd and secured in the socket
  • Mould sealant or putty applied at the base
  • Vent holes verified open, where the socket has them
  • Rope pre-heated where the spec or the weather calls for it
  • Resin on hand and within its shelf life
02

During the pour

Six items. This is the part that takes two minutes and cannot be repeated.

  • Compound temperature verified before it goes in
  • Poured in one continuous flow, no interruption
  • No visible leaks or spillage
  • Smoke and steam observed as expected, meaning moisture burning off
  • Fill level correct: slightly over the top, ground flush later
  • Timestamp recorded and a photograph taken
03

Cure and inspect

Six items, over however long the resin takes. Curing is not something you can hurry.

  • Cured undisturbed for the minimum time in the spec
  • Cooled slowly: no water, no forced air
  • Top ground flush where needed
  • Inspected for cracks, voids and improper fill
  • Marked with the job number, serial number and inspector initials
  • Cured socket photographed
04

Documentation

Four items, and the reason any of the rest is provable a year from now.

  • Photographs of the broomed wire, the pre-cure setup and the finished socket
  • Pour data logged in the inspection report
  • Certificate of conformance prepared where it is required
  • Working load limit or ID tag attached to the assembly
Page one of the Nelson Rigging Services spelter socket pour and inspection checklist: job header fields and the nine-point pre-pour inspection table Page two: the six-point pouring process table and the six-point post-pour and curing table Page three: the four-point documentation table, inspector signatures, date performed and comments
The sheet itself, Rev 1.0. Three pages, filled out on the job and signed before the assembly goes back in service.
05

In the shop, too

Not every socket has to be poured at the water. If the assembly can travel, or you are ordering a new pendant outright, the same work happens in Hatfield.

We stock the rope, so a new pendant can be built and socketed here as one job: rope off the reel, cut to length, sockets on both ends, ready to go on the boat. Because we also proof test in the same building, a shop-poured assembly can be pulled before it ships, which is the one thing a dockside pour cannot offer.

A finished poured socket on a wire rope pendant, with the coiled rope and its reel behind it
06

What you keep

Every pour comes with a certificate recording what was done, to what, with which resin, by whom and when.

  • The rope: diameter, construction and grade.
  • The socket, and the resin used in it.
  • The date of the pour, and who performed it.
  • The finished assembly, so the paperwork and the steel can be matched to each other later.
A field pour is not proof tested, and we will not pretend otherwise. There is no way to pull an assembly to its proof load on a pier, so a dockside socket is certified on the pour, not on a test. If the assembly has to be proof tested before it goes back in service, it has to be poured in the shop, or come to the shop afterwards, and we will say so when you call rather than after the invoice.

Need a socket poured

Tell us where the boat is, what the rope is, and when she needs to sail.

Arrange a pour

Termination efficiency figures are the standard published ratings for wire rope end terminations: resin-poured and swaged sockets at 100% of the rope's catalog breaking strength, wedge sockets and correctly applied wire rope clips at approximately 80%. Resin compounds used are Wirelock and Crosby Socketfast, poured to the manufacturer's published procedure. Coverage, capability and documentation current as of 2026.