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Holloway Houston builds custom slings in-house to your exact specs - any length, WLL, and end fitting combination, with proof testing and cert documentation.
Sheaves
The sheave is the heart of any lifting block. It is the rotating interface that carries the load and dictates the lifespan of your wire rope. A poor-quality sheave with a soft groove will wear quickly, creating corrugations that act like a file, shredding expensive wire rope strands. To maximize safety and minimize downtime, you need sheaves engineered for toughness and geometric precision.
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Wire Rope Sheaves & Pulleys
Holloway Houston stocks the world's most trusted lineup of McKissick (Crosby) Sheaves. Unlike cast iron alternatives that can crack under shock loading, McKissick sheaves are Roll-Forged from high-quality steel, providing exceptional strength and a perfect groove profile. Whether you are replacing a worn pulley in a crane block or building a custom diversion system, we have the precise bore and diameter you need.
The McKissick Advantage: Roll-Forged Technology
Why are McKissick sheaves the industry standard?
- Roll-Forged™ Structure : A solid billet of steel is heated and split-formed, then "upset" and rolled to shape. This improves the grain structure of the steel, making it vastly stronger than cast sheaves of the same weight.
- Flame Hardened Grooves : The rope groove is flame-hardened to 35 Rockwell C (minimum). This ensures the groove retains its shape and smoothness, drastically reducing wear on both the sheave and the wire rope.
- Concentricity : Because they are machined from a solid forging, these sheaves offer superior balance and run-out characteristics, reducing vibration at high line speeds.
Bearing & Bore Types
Our inventory includes various hub configurations to match your specific shaft requirements.
- Design : Fitted with a self-lubricating SAE 660 Bronze Bushing.
- Application : Ideal for slow line speeds and high static loads (e.g., snatch blocks, deflection rollers).
- Maintenance : Requires regular grease lubrication via the shaft.
- Design : These sheaves are supplied with a precisely machined bore (e.g., 1.569", 1.875") ready for installation on a shaft or for the insertion of your own bearings.
- Application : OEM replacements, custom machinery, and applications where specific shaft tolerances are required.
- Key Feature : Available in a massive range of bore sizes to fit existing axles without additional machining.
Selection Guide: Matching the Rope
Selecting the correct sheave is important for safety.
- Wireline Size : You must match the sheave groove to your wire rope diameter (e.g., 1/2", 5/8", 1"). A groove that is too narrow will pinch and crush the rope; a groove that is too wide will flatten the rope.
- Sheave Diameter (D/d Ratio) : The larger the sheave, the less fatigue on the wire rope. A sheave diameter at least 20 times the rope diameter is recommended for standard hoisting applications.
- Bore Size : Measure your shaft diameter precisely. Our "Finished Bore" sheaves come in specific decimal sizes (e.g., 1.875") to ensure a tight, wobble-free fit.
Customization & Machining
Holloway Houston is a full-service rigging shop.
- Bore Modification : If you see a sheave with the right diameter but the wrong bore, our machine shop can often modify it to your specifications.
- Full Assembly : We can install these sheaves into Custom Blocks or Headache Balls fabricated to your requirements.
Browse our inventory below to filter by Wireline Size, Sheave Diameter, and Bore Size.
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Guides & Resources
All Articles
Wire Rope Types: Composition, Grades & How to Choose
A crane on an industrial site, a winch line on a barge, and a sling in a fabrication shop may all use wire rope, but rarely the same variety.
Types of Sheaves: Applications and Selection Guide
A sheave is a base component in any rigging or lifting system. Whether wire rope runs through a crane block, a winch fairlead, or an offshore pedes...
Why Buy from Holloway Houston?
HHI builds custom slings in-house to your exact specs - any length, WLL, and end fitting combination.
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Frequently Asked Questions
If you couldn't find your query please write to us wirerope@hollowayhouston.com
Sheaves guide and redirect wire rope, changing the direction of pull and, in block-and-tackle arrangements, providing mechanical advantage to reduce the effort needed to lift a load.
The sheave's groove diameter and tread diameter must be matched to the wire rope diameter and construction. An undersized sheave accelerates wire rope wear and fatigue; the manufacturer's minimum sheave-to-rope diameter ratio should be followed.
Rated capacity depends on the sheave or block size, bearing type, and reeving arrangement. Multi-part reeving changes the effective load on the block versus the load being lifted - confirm this in the rigging plan.
Inspect the groove for wear, cracking, or a sharp/worn profile, and check that the sheave rotates freely on its bearing. Lubricate per the manufacturer's schedule, and remove from service if groove wear approaches the rope diameter.
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