Hammerlok Coupling Link (Grade 80)

CM Rigging Herc Alloy 800 Hammerlok Image

Working Load Limit: 2,100 to 72,300 lbs.
Sizes: 7/32 to 1-1/4 in.
The Hammerlok Coupling Link (Grade 80) is constructed of drop forged alloy steel and used primarily in the construction of overhead lifting slings.

Size (in): 9/32, 3/8, 1/2, 5/8, 3/4, 7/8, 1, 1-1/4, 7/32

WLL (lbs): 3500, 7100, 12000, 18100, 28300, 34200, 47700, 72300, 2100

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Features and Benefits

Heavy-Duty Grade 80 Alloy Steel Construction
Built for strength and durability, the Hammerlok is ideal for demanding overhead lifting applications, ensuring long-lasting performance under load.
Secure and Permanent Chain Connection
Designed to connect chain branches to master links, hooks, or other fittings with a mechanical interlock, providing a safe and tamper-resistant connection.
Easy Assembly with Hammer and Rivet
No special tools required—just a hammer and the included rivet/pin system make installation quick and straightforward, reducing downtime on the job site.
Wide Range of Sizes and Capacities
Available in sizes from 7/32" to 1-1/4", with working load limits up to 72,300 lbs, making it suitable for a variety of rigging configurations and load requirements.
Meets or Exceeds Industry Standards
Engineered to meet ASME B30.9 and other applicable standards, ensuring compliance and peace of mind in critical lifting operations.

Dual-Rated Versions Available Some Hammerlok models are dual-rated for Grade 80 and Grade 100, offering increased versatility in lifting applications.

Assembly Tooling While a hammer is typically used, optional assembly tools (like alignment pins or fixtures) may be available to simplify installation in high-volume or precision environments.

Color Coding or Finish Options In some cases, color-coded finishes may be available to help identify chain grade or size, though this is more common in custom or OEM applications.

Specifications

Model Number	Grade	Size (in)	WLL (lbs)
C664021-2	80	7/32	2,100
C664028-2	80	9/32	3,500
C664038-2	80	3/8	7,100
C664050-2	80	1/2	12,000
C664062-2	80	5/8	18,100
C664075-2	80	3/4	28,300
C664089-2	80	7/8	34,200
C664100-2	80	1	47,700
C664125-2	80	1-1/4	72,300

Documents

Brochures & Catalogs

[Brochure] CM Rigging Hammerlok 800 Brochure

Product & Data Sheets

[Product Sheet] Hammerlok Stud Tube Diameter Bulletin 152726 [Product Sheet] CM Rings and Links Overview

FAQs

What is the working load limit (WLL) of the Hammerlok Coupling Link?

The WLL ranges from 2,100 lbs to 72,300 lbs, depending on the size of the link (from 7/32" to 1-1/4").

Can the Hammerlok be used for chain repair or splicing?

No, it is not designed for chain repair or splicing. It should only be used to connect chain branches to master links or hooks in overhead lifting slings.

What chain grades is the Hammerlok compatible with?

It is designed for Grade 80 chain, and some models are dual-rated for Grade 100, offering added versatility.

What tools are required for assembly?

The Hammerlok is assembled using a hammer and a rivet/pin system—no special tools are required, making it easy to install in the field.

Does the Hammerlok meet industry standards?

Yes, it meets ASTM A952 standards and has a design factor of 4:1, ensuring compliance with overhead lifting safety requirements.

Rings & Links Overview

Hammerlok Coupling Link (Grade 80)