What types of cranes do we provide replacement sheaves for?
We can provide replacement crane block sheaves for Konecranes, Liebherr, American, Demag, Link-Belt, Terex, Grove, Mannitowoc and other makes. Applications include mobile cranes, harbor cranes, container cranes, tower cranes, railroad cranes jib/workshop cranes and others.
What is a sheave?
Definition of sheave (Entry 1 of 2) : a grooved wheel or pulley (as of a pulley block)
How does a sheave work on a cable?
The grooved wheel spins on an axle or bearing inside the frame of the block. This allows the wire or rope to move freely minimizing friction and wear on the cable. Sheaves can be used to redirect a cable or rope, lift loads, and transmit power. The words sheave and pulley are sometimes used interchangeably.
What is a sheave block?
Sheaves are also commonly known as pulleys, and when two or more pulleys are used together for extra strength, this is known as a sheave block. Rope pulleys were actually used as far back as the 1500s in order to hoist water out of wells, and they were likely used to lift and move heavy rocks that created Stonehenge in the UK.
What is the function of sheave?
A sheave (/ʃiːv/) or pulley wheel is a grooved wheel often used for holding a belt, wire rope, or rope and incorporated into a pulley. The sheave spins on an axle or bearing inside the frame of the pulley. This allows the wire or rope to move freely, minimizing friction and wear on the cable.
What are sheaves on a lift?
In traction elevators, elevator sheaves are the pulleys that hold the elevator cables. These are responsible for the elevator's traction and thus its lifting motion. With continued use, the grooves in the sheaves that hold the ropes become worn and affect the elevator's safety and efficiency.
Is a sheave the same as pulley?
A pulley is one of six types of simple machines. A sheave (pronounced “shiv”) is actually part of the pulley system. The sheave is the rotating, grooved wheel inside the pulley. This is the piece that the rope fits into.
What is a sheave in rigging?
They are used in tandem with a rope, belt, or cable to lift items with a crane. Essentially, a sheave is a wheel with an open groove that a rope or cable fits around so it can rotate around the exterior.
Why is a pulley called a sheave?
Wikipedia defines a pulley as "a wheel on an axle or shaft...", and it defines sheave as "a pulley with a grooved wheel..." Well, that suggests that all pulleys with grooved wheels are sheaves.
What is a block and sheave?
Sheaves and pulley blocks are devices that aid the lifting or pulling of loads. They mount to a surface or suspend from equipment and have a grooved wheel (sheave) for guiding a wire rope or aircraft cable that's attached to the load.
What are crane sheaves made of?
Sheaves can be found in forklifts, cranes, cable stranding machines, and wire drawing machines. Nylon is a popular material for sheaves because of its durability and versatility.
What does the winch and sheave do?
The winch is used to lower gravity mass to ground during conveyor maintenance. The rope on the Take-up System travels around the sheave on the trolley, up and over the gravity tower and down to the winch at the tower base. The winch is meant to be used to tension up a conveyor (the conveyor can go regenerative).
What is a sheave pin?
The Instrumented Sheave Pins are often used to measure line tension by monitoring reaction load on the pin. Using the equations provided below, the line tension can be determined.
How do you rig a sheave?
0:231:37Tackle Two Fold Purchase - YouTubeYouTubeStart of suggested clipEnd of suggested clipAnd begin by pulling your line from the upper block through the bottom sheave of the lower block.MoreAnd begin by pulling your line from the upper block through the bottom sheave of the lower block. And then up through the bottom sheave of the top block. Continue by pulling the line down.
What are synonyms for sheaves?
In this page you can discover 7 synonyms, antonyms, idiomatic expressions, and related words for sheaves, like: sheaf, bundles, sheave, clusters, packages, bunches and collections.
What is sheave used for?
No Comments. While sheaves may be a relatively small piece of hardware, they play a crucial part in mechanical engineering and lifting equipment. They are used in tandem with a rope, belt, or cable to lift items with a crane.
What is the shell of a sheave?
There is also a protective shell surrounding the sheave. Inside is the sheave or pulley, which looks like a wheel. There is a pin that runs through the sheave so that it can rotate. The opening between the interior sheave and exterior shelf is called the swallow, and the bottom opening of the shell is the breech. Source.
What is the term for the cable that moves over the wheel of a sheave?
The cable smoothly moves over the wheel of the sheave as it is wound up on the fixed object, lifting the other object into the air. Sheaves are also commonly known as pulleys, and when two or more pulleys are used together for extra strength, this is known as a sheave block.
What is a heavy duty sheave block?
Heavy-duty sheave blocks are best for heavy-duty applications with thicker ropes and cables and heavier weight bearings. They are available in 102 mm through 305 mm (4” through 12”), and are often used in work environments where the sheave block will be operating continuously.
How does a breech work?
Breech. First , there is a hook at the top which connects the entire block to the lifting equipment piece, such as the top of a crane. Next, there is a strap that surrounds the sheave block so the rope or cable stays in place. There is also a protective shell surrounding the sheave.
How wide is API groove?
Excessive wear can break down ropes and cables much quicker. The API style groove profile is 30 degrees wide, the Aise style is 35 degrees wide, and the European style is the widest at 45 degrees.
What is the groove profile of a sheave?
Groove Profiles. There are also different shapes and styles of the grooves within the sheaves. These different styles are made to accommodate different types of ropes or cables, and it is best to choose a groove size that is 5% to 10% wider than the diameter of the rope used. Source.
What is a sheave on a rope?
Sheaves can be used to redirect a cable or rope, lift loads, and transmit power. The words sheave and pulley are sometimes used interchangeably.
What is a grooved wheel?
Grooved wheel used for holding a belt, wire or rope. Not to be confused with sheaf, which has the same plural as "sheave". This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources.
Groove Profiles
Normal Duty Sheaves
- As the name implies, normal duty sheaves are designed for moderate weight loads and “normal” duty applications. These sheaves are available in 76mm through 406mm (3” to 16”) wide sheaves and are often protected with sheave guards so the rope or wire being used stays in place. A normal duty sheave block is best for lighter loads and slow line speeds, such as hand-operated a…
Heavy Duty Sheaves
- Heavy-duty sheave blocks are best for heavy-duty applications with thicker ropes and cables and heavier weight bearings. They are available in 102 mm through 305 mm (4” through 12”), and are often used in work environments where the sheave block will be operating continuously. Heavy-duty sheaves use closed die forging, which means that the hot metal is poured on dies (or mold…
Domed Sheaves
- Domed sheaves are reinforced for extreme duty applications. These sheave blocks are welded in a circular pattern, which reduces additional stresses made by welding ribs. Domed sheaves are also the largest and are available in 610 mm (24”) and larger sizes. Domed sheave blocks have the greatest strength and rigidity of all sheave types and are made ...