Crosby® McKissick® 418 Sheave Blocks w/ Hook & Roller Bearings
This is the heavy-duty end of the sheave block line: Crosby® McKissick® 418-type blocks built on roller bearings for frequent, high-cycle lifting rather than occasional use. Each block hangs from a forged alloy, heat-treated rigid hook, not a swivel, and is made in the USA. The 6" and 8" sheave sizes share a common hook assembly that interchanges across the McKissick 4-1/2" to 14" size range, so crews and dealers running mixed rigging inventory can standardize on one hook style instead of stocking separate hardware per block size. All sizes meet or exceed ASME B30.26 requirements.
Common Uses
- Crane operations and heavy load positioning
- High-cycle lifting applications where roller bearings outlast a bushing under repeated use
- Rigging setups standardizing on interchangeable hook hardware across multiple block sizes
- Contractors and dealers needing documented, made-in-USA rigging hardware
How to Choose the Right Sheave Block
Match wire rope diameter first, then confirm the working load limit covers your actual working load with margin to spare. Note the jump in capacity between the 6"/8" models and the 18" model — they're built for different wire rope diameters and load ranges, not just different sheave sizes.
| Sheave Size |
Wire Rope Diameter |
Working Load Limit |
Hook Type |
SKU |
| 6" |
5/8" - 3/4" |
16,000 lbs |
Rigid, forged alloy |
4180H6RB-CR |
| 8" |
5/8" - 3/4" |
16,000 lbs |
Rigid, forged alloy |
4180H8RB-CR |
| 18" |
1" |
30,000 lbs |
Rigid, forged alloy |
4180H182RB-CR |
Meeting ASME B30.26 covers the hardware's design and construction standard, not your specific lift or rigging setup. Confirm your wire rope, hook, and full rigging chain are matched to your lowest-rated component, and follow applicable OSHA rigging and crane standards along with your equipment documentation for setup and inspection requirements.
Complete the Job
Need a fixed-mount block instead of one that hangs from a hook? See the Crosby® McKissick® 404 Tailboard Blocks w/ Bronze Bushing. For lighter-duty or shackle-end configurations, browse the Snatch Block w/ Hook SS 304 and 4190 Snatch Block w/ Shackle collections, or see the full Crosby® McKissick® Snatch Blocks line for other bearing and hook options.
Frequently Asked Questions
Why a rigid hook instead of a swivel hook?
A rigid forged hook keeps the block oriented to the load path without the rotation a swivel allows. It's the standard configuration for this heavy-duty McKissick line; if your rigging setup needs a swivel connection, check with our Product Experts on available configurations.
What does the interchangeable hook assembly mean for me?
The 6" and 8" models share a hook assembly compatible across McKissick blocks from 4-1/2" to 14". If you're running several block sizes in that range, you can standardize on one hook style rather than stocking a different hook for each block.
Why roller bearings instead of a bronze bushing?
Roller bearings are built to hold up under frequent, high-cycle lifting where a bronze bushing would wear faster. This line is built for that duty level, not occasional use.
How do I know which working load limit I need?
Identify the maximum load your rigging setup will actually lift or support, then choose a block with a WLL that provides margin above that figure. Never load a block at or beyond its rated WLL, and confirm your full rigging chain is rated to match.
What does ASME B30.26 compliance mean?
ASME B30.26 sets design, construction, and marking requirements for rigging hardware like blocks and hooks. It confirms the hardware is built to that standard; it doesn't certify your specific lift or substitute for your own inspection and load calculations.
