Chain & Wire Rope

Forney Industries Wire Rope, Chain & Accessories

Welded and Weldless Chain: This group of products is designed for DIY, industrial, and professional users. Primary Applications; Grade 30 & Grade 70 Transport and Binder Chain are used in Farming, Logging, Construction, Transport, Restraining applications. Linked and Looped Chain is used for playground equipment, animal chains, boat chains, gate chains, trailer safety and barrier applications.

Chain Accessories. Our Chain Accessories directly support Welded and Weldless chain. Clevis, Slip, and Eye Hooks are the main products in this category. All of our Chain Accessories are heavily used in the farm and ranch, automotive, hardware, and industrial industries.

Wire Rope Offering: Forney wire rope offerings are intended to support commercial use.  It is considered Light to Moderate Duty and is also used in the everyday Do-it-Yourself-er (DIY) to light industrial markets. Wire rope is commonly used for winches, zip lines, pulleys’, stage rigging, and fence.

Wire Rope Accessories. Our Wire Rope Accessories directly support Wire Rope. Wire Rope Clips are the main products in this category. Wire Rope Accessories are heavily used in the farm and ranch, automotive, hardware, and industrial Industries.

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What is the difference between welded and weldless chain?

Welded graded chain

Industrial grade used extensively in rigging and towing. Forney® graded chains (Grade 30 and Grade 70) are manufactured in accordance with the NACM specification for chain, ASTM Standard A391, ASTM Standard A413, and meet all DOT standards.

Primary Applications; Grade 30 & Grade 70 Transport and Binder Chain- Farming, Logging, Construction, Transport, Restraining applications.

Weldless chain

Links are secured to each other by machine twisting or bending and tend to be less secure than welded chain.

Primary Applications: playground equipment, animal chains, boat chains, gate chains, trailer safety and barrier.

What is the difference between grade 30 and grade 70?

The grade number equates to the strength level of the chain with the grade number increasing as the strength of the chain increases. Both are not suitable for not overhead lifting

Grade 30 Chain – General Purpose chain, General purpose low carbon chain with industrial and agriculture applications.

Grade 70 Chain – higher strength heat treated carbon steel otherwise known as “Transport Chain” used for tie downs, loggers on transportation loads.


Where can I find D.O.T. regulations for load securement?

Department of Transportation regulations can be found at www.fmcsa.dot.gov

Which grades of chain can be used for overhead lifting?

Only grade 100 or grade 80 can be used for overhead lifting.

What does WLL mean and how is Forney graded chain rated?

WLL stands for Working Load Limits. This designates the maximum stress in pounds which should ever be applied to chain. This refers also to chain in the best condition, when new, and when the load is applied uniformly to a straight, untwisted length of chain.  

See WLL in the table below.

Chain/Wire Rope Size
Grade 30 Proof Coil (WLL in lbs.)
Grade 70 Transport (WLL in lbs.)
Double Loop (WLL in lbs.)
Straight Link (WLL in lbs.)
Twist Link (WLL in lbs.)
Galvanized Wire Rope (WLL in lbs.)
1/16" - - - - - 480
1/8" - - - - - 1,700
3/16" 750 - - - - 3,700
1/4" 1,250 - - - - 7,000
5/16" 1,900 4,700 - - - -
3/8" 2,650 6,600 - - - -
#2/0 - - 225 520 495 -
#3 - - 90 - - -

*WLL is sometimes called Safe Working Load (SWL)

What is the difference between a slip hook and grab hook?

Grab Hooks

Designed to hook onto a matched chain between the links.  The grab hook is commonly used to hook back into the chain between the links after wrapping an object, connect separate pieces of chain, and/or to shorten chain length.   You can loop your chain around something and hook the chain on to one link of the chain and it won't slip.

Slip Hooks

With a slip hook the chain will slip through the hook and tighten around the object (great for dragging logs, rocks, etc.) Designed with a wider throat, which is the space between the tip and the back of the hook, than the grab hook and allows the chain to slip through the hook.  This allows items such as webbing, chain, master links, or shackles to be placed on the hook do not slip out when there is no weight holding them in place.

What is the difference between a clevis and eye hook?

The top end of hoist hook is also different in shape according to how it will connect to the chain or rope, such as clevis hook and eye hook.

A clevis hook can be easily identified by its U shaped end which has pre-drilled holes at the upper section of each leg. These holes can be slipped through with a small and removable pin to secure the connection. The mechanism of the removable pin can also offer a quick and easy assembly. An eye hook is well-known as its rounded end, the design of circle makes ropes can be easily threaded through.

What are anchor shackles used for?

anchor-shackle-diagram.png

Anchor shackles connect to a fixed object and a moving one.  The round shape allows the moving load to pull from any direction but still have the same relative force applied to the anchor shackle.


Does the Weight Load Limit (WLL) Change if I have a “Side Load”?

Yes, in side loads the following load reductions need to be taken into account:

 Load Angle - New Working Load Limit

  • 0° - 100% of original WLL
  • 45° - 70% of original WLL
  • 90° - 50% of original WLL

What are the benefits between a screw pin and clevis pin?

Screw pin shackles are a perfect choice for items that require frequent connecting and disconnecting.  “Clevis pin” have a dual insurance with a pre-drilled hole on the thread prevent the bolt from loosening.

Can I use grade 43 hooks with grade 70 chain?

Yes, however, the assembly will be rated to the WLL of the weakest component.

What is the difference between quick link, cold shut and lap links?

Quick Links

  • Two-sided thread links
  • Designed to be reusable
  • Working Load Limit (WLL) must be matched to that of the chain

Cold Shut Links and Lap Links

  • Slide between two links
  • Hammered and peened shut through the eye
  • Working Load Limit (WLL) must be matched to that of the chain

What is the difference between drop forged and malleable rope clips?

“Drop Forged” is stronger and designed for heavy duty applications.  “Malleable are more brittle and should be used in light-duty applications.

Recommended Number of Forged Rope Clips to Use
Clip Size (in) Min No. of Clips Amount of Rope to Turn Back (in) Torque in Ft. Lbs.
1/8 2 3-1/4 4.5
3/16 2 3-3/4 7.5
1/4 2 4-3/4 15
5/16 3 5-1/4 30
3/8 3 6-1/2 45
7/16 3 7 65
1/2 3 11-1/2 65
9/16 3 12 95
5/8 3 12 95
3/4 4 18 130
7/8 4 19 225
1 5 26 225
1-1/8 6 34 225
1-1/4 7 44 360
1-3/8 7 44 360
1-1/2 8 54 360
1-5/8 8 58 430
1-3/4 8 61 590
2 8 71 750
2-1/4 8 73 750
2-1/2 9 84 750
2-3/4 10 100 750
3 10 106 1200
3-1/2 12 149 1200

Clip Size (in) Min No. of Clips Amount of Rope to Turn Back (in) Torque in Ft. Lbs.
1/16 2 3 2.5
3/32 2 3 2.5
1/8 3 4-3/4 3
3/16 3 5-1/2 4.5
1/4 3 7 15
5/16 3 7-3/4 15
3/8 3 9-1/2 30
7/16 3 10-1/4 40
1/2 4 15-1/4 45

Installation of wire rope clips

wire-rope-clips-installation.png

After initial inspection, wire rope clips are ready to be installed. In order to fix rope firmly, at least three clamps are required. The actual number of wire rope clips should be applied in accordance with the diagrams to the right.

Step 1

Go back no less than a specified length of wire rope (as shown in graph) from the eye/thimble. The first wire rope clip needs to be set one base width from the tail (sometimes called dead end) of the wire rope. Workers need to pay attention installing clips. The U-shaped Bolt of the wire rope clip must be placed on the “dead end” of the wire rope; and the saddle must be placed on the “live end” of the wire rope. (This can be easily remembered as “never saddle a dead horse”.) After clips are installed, both of the nuts need to be tightened to required torque as shown below.

Step 2

The second wire rope clip is the hardest one to install. There are two things we have to pay attention to: Position and Force. First, the clip should be placed close to the thimble as close as possible. Second, after positioning the clip, tighten the nuts, but keep them loose, DO NOT tight them up all the way.

Step 3

This step applies to all additional clips used starting from the 3rd clip. Their installation methods are the same. Prior to starting, workers have to add horizontal tension to wire rope to keep wire rope straight. Then install all additional clips to the wire rope in sequence, clips should be placed between the first two and separate from each other with equal intervals. Finally, tighten all nuts to specified torque (shown below) evenly.

When wire rope starts loading, stretch and shrink in diameter could occur. This may cause nuts to become loose. It is necessary to periodically inspect and re-tighten the clips.

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