Product Spotlight: Hammerlock Coupling Links

Product Spotlight: Hammerlock Coupling Links

What is a Hammerlock Coupling Link?

Hammerlock coupling links are used for attaching chain to master links, eye type hooks, installing a new branch to a sling or just connecting components during chain sling fabrication.

Hammerlock coupling links should NEVER be used to repair hoist chain—No coupling hardware should ever be used to repair a damaged link of chain. This can present a number of safety hazards to the operator and possibly the overall hoist. In the case of hoist chain damage or ware, the chain needs to be replaced as one piece.

Hammerlocks are also not appropriate for lengthening chain. Once again, if you desire a longer chain, you need to seek out a chain that is fabricated to the correct length, using the correct links.

Assembly and Disassembly of Hammerlock Coupling Links

Hammerlock coupling links are a favorite of riggers because they can so easily be assembled and disassembles in the field using only a hammer and punch.

How to assemble a hammerlock link:

  1. Bring the two halves of the body together so the center connectors are aligned
  2. Position the bushing in the center of the hammerlock, aligned with the connectors
  3. Insert the load pin through the hammerlock as far as you can by hand
  4. Hammer the load pin the rest of the way in, until all material is flush on both ends


Did you know the bushing in the center is one of the most important parts of a hammer coupling link? Without the bushing, the load pin on its own will not hold the hammerlock coupling together at all – It actually moves quite freely within the body on its own. The load pin is tapered on the ends which allows the bushing to sit in place and hold the hardware securely together. The bushing contains a spring-like system that allows the pin to push through when hammered, but returns to an un-movable state once in place – Unless directly hammered again using a punch!

How to disassemble a hammerlock link:

  1. Place the hammerlock link on a raised surface, creating room for the load pin to exit the bottom
  2. Align a punch with the center-top of the load pin
  3. Hammer the punch forcing the load pin out from the center of the hammerlock
  4. Pull now loosened parts apart by hand – It’s that easy!

In need of an affordable and reliable hammerlock coupling link?

That’s where YOKE comes in—With YOKE you never have to sacrifice quality for price. Find YOKE Hammerlock Connecting Links for Grade-100 Chain at your local Hercules SLR. YOKE Hammerlock connecting links are made of alloy steel and are quenched and tempered for maximum strength, reliability, and durability with a working load limit of 8800 pounds.

Since 1985, YOKE manufactures durable, reliable & high-quality rigging hardware that keeps your load secure, and your team safe. They run a strict production facility, with a huge emphasis on quality control & safety at every stage of the manufacturing process—From raw materials to the finished product for the end-user, with facilities across the globe, in Canada, Los Angeles and China. To learn more about YOKE at Hercules SLR, click here.


Product Spotlight: YOKE Swivel Self-Locking Hooks

yoke swivel self-locking hooks blog header

Product Spotlight: YOKE Rigging Hardware 

Concerned about price, quality & reliability? Choose YOKE, and get all three without making a sacrifice. YOKE swivels are manufactured with the highest grade materials, and are zinc-plated for corrosion resistance and a long life.


Swivel hooks come in two varieties. These are:

  • Positioning Hooks allow the rigger to align the hook while connecting to the load. These hooks aren’t meant to rotate while under load, only to position the hook to the pick point.
  • True Swivel Hooks with Bushings allow the hook to rotate freely under the load, while the top coupling/fitting pivots to let the load rotate. This helps prevents your line twisting.

Swivels should be used when the lift deals with these issues:

  • Swivels reduce bending loads on rigging attachments to allow the load to position itself freely.
  • Swivels should be used in place of shackles during applications where the shackle might twist and might be haphazardly loaded.

FYI: Before you lift a load, make sure there are not cracks or defects in the hook or latch, and that the chain or wire rope is not worn, and in good working order. Not all hooks are meant to overhead lift and not all swivels are meant to swivel under-load—It’s important to know which application the one you use is meant for.


Today, the Hercules SLR product spotlight is on YOKE Swivel Self-Locking Hooks and some of the lifting products from them we like the best. Read on to learn more about YOKE Swivel Self-Locking Hook specifications, tips for use and which applications to use swivel self-locking hooks for.


YOKE Swivel Self-Locking Hooks with Bronze Bushing(s) perform a full-swivel under-load. YOKE’s bronze bushings are a bearing consisting of a thin sleeve, used to help the hook rotate or swivel before you lift—Not while it supports a load.

Design factor of 4:1, proof-tested and certified. These hooks are meant for positioning devices, and are not meant to rotate while suspending a load.

Available for Grade 80 Lifting Chain in sizes: 7/32″, 1/4—5/16″, 3/8″, 1/2″, 5/8″, 3/4″, 7/8,” 1″ and Working Load Limits: 2,500lbs, 4,500lbs, 7,100lbs, 12,000lbs, 18,100lbs, 28,300lbs, 34,200lbs and 47,700lbs.


YOKE Swivel Self-Locking Hook with Bearing(s) are an excellent choice for lifting and perform a full swivel under-load. Designed with a 4:1 safety factor, and Working Load Limits: 7/32″, 1/4—5/16″, 3/8″, 1/2″, 5/8″, 3/4″, 7/8″ and 1″.

Available for Grade 80 Lifting Chain in sizes: 2,500lbs, 4,500lbs, 7,100lbs, 12,000lbs, 18,100lbs, 28,300lbs, 34,200lbs, 47,700lbs. Available for Grade 100 chain in sizes: 6, 7.8, 10, 13, 16, 20, 22, 26mm. Designed with a 4:1 safety factor, and for Working Load Limits: 1.4, 2.5, 4.0, 6.7, 10.0, 16.0, 19.0 and 26.5 tonnes.


YOKE Swivel Hooks are also available with an eye attachment. Available for Grade 80 Chain in sizes 7/32″, 1/4-5/16″, 3/8″, 1/2″, 5/8″, 3/4″, 7/8″, 1″ and 1-1/8″. Designed with a 4:1 safety factor, and for Working Load Limits: 2,500lbs, 4,500lbs, 7,100lbs, 12,000lbs, 18,100lbs, 28,300lbs, 34,200lbs, 47,700lbs.


Swivel self-locking hooks should only be used to swivel under-load if they’re fit with a bearing and are approved by the manufacturer overhead lifting. Swivel self-locking hooks are generally known as positioning hooks, since they rotate which makes connecting the rigging to the load much easier.

Industries that use YOKE Swivel Self-Locking Hooks, include:

  • Automotive
  • Construction
  • Mining
  • Manufacturing
  • Machining
  • Transportation


Grip Safe Locking Hook by Yoke gets Safety Boost

yoke grip safe locking hook x-95x series

Product Feature: YOKE Grip Safe Locking Hook Offers Safe Rigging 

Feature found on X-950-10 and X-951-10 Yoke Grip-Safe Locking Hooks.

Riggers in the field instantly recognize the safety features of the YOKE Grip Safe hooks for hoisting and rigging applications.

What makes the Yoke Grip Safe Locking Hook so good? Its ergonomically-designed handle is meant specifically for bulky, gloved hands, and a smoother trigger design made complete with a simple push-button that opens the mechanism—This helps operators avoid any potential finger or hand injuries other hooks cause when used for overhead lifting operations.

The unique design handle of the Grip Safe hook maintains the integrity, warranty and certification that may not always be available from other retrofit designs. The handle is designed as part of the overall forging so requires no complicated or expensive retro fit by the operator.

Grip safe hooks come in range of designs and sizes, including:

  • Eye type
  • Clevis type
  • Swivel type
  • 10mm through 22mm (4t – 19t WLL).

When YOKE says, “Safety is our first priority”, they mean it. 

Hercules SLR provides any rigging or hoisting solution your business, project or facility needs.

For quotes, or to for more information on Yoke Grip Safe Locking Hooks, email us at or call us at 1 (877) 461-4876

Hercules SLR is part of Hercules Group of Companies, with locations and unique businesses coast-to-coast. Hercules SLR provides securing, lifting and rigging services for sectors in Canada and Internationally. Hercules SLR serves the energy, oil & gas, manufacturing, construction, aerospace, infrastructure, utilities, mining, marine industries and more.

Hercules Group of Companies is made of: Hercules SLRHercules Machining & Millwright ServicesSpartan Industrial MarineStellar Industrial Sales and Wire Rope Atlantic.