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Pulley Block

Pulley block is a simple machine composed of a plurality of movable and fixed pulleys, its working principle is mainly based on the characteristics of movable pulleys and fixed pulleys, movable pulleys can save force, but can not change the direction of force; The fixed pulley can change the direction of the force, but not the effort, the combination of the two, the pulley set can save effort and change the direction of the force.

Application scenario of pulley block: Pulley block has a wide range of applications in real life because it can save effort and change the direction of force. Pulley blocks are often used to lift heavy objects on construction sites; In the lifting operation, the pulley block can easily change the lifting direction; The pulley block is also an indispensable part of the ship and lifting machinery
Parameters: 16t 5t 20t 32t (customizable)

Crane Pulley Block

Your Professional Pulley Block Supplier!

Henan Jinjiayou trading Co., LTD is a modern production enterprise integrating R&D, customization, production, sales and service. The company was founded in 2007, is located in the famous "lifting town" - Changyuan, Henan Province, the registered capital of 11.8 million, covers an area of 25333 square meters. Main products crane wheel group, drum group, hook group, coupling, widely used in metallurgy, lifting, mining, electric power, chemical industry and other fields.

Why Choose Us

Quality Control

We rigorously oversee every detail from raw materials through the production process. Equipped with comprehensive physical and chemical testing equipment as well as high-precision measuring instruments, we conduct multi-level quality inspections.

Customized Service

Based on customer requirements, we offer one-on-one customized services, enabling demand-driven production and ensuring precise product dimensions.

Patent Certification

Our products have obtained ISO 9001 Quality Management System certification and other relevant qualifications, demonstrating our authoritative and professional credentials.

Quality Service

We maintain a dedicated after-sales service team that responds to customer inquiries within 10 minutes and provides solutions within 3 hours. For complex after-sales issues, we commit to dispatching technicians to the site within 2 days for resolution.

Our Best-Selling Pulley Block

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Crane Pulley Block

Pulley block is a simple mechanical device composed of movable pulley and fixed pulley, and its operating mechanism fully integrates the characteristics of the two types of pulley. The movable pulley has a labor-saving function but cannot change the direction of force, while the fixed pulley can adjust the direction of force but does not have the advantage of labor-saving.

Pulley Block Specification

Tonnage	16t 5t 20t 32t (customizable)
Pulley groove bottom	250mm-800mm
Outer diameter of pulley	300mm-920mm
Shaft length	130mm-812mm
Shaft diameter	45mm-110mm
Thickness	70mm-882mm

Key Features of Pulley Block

Directional Change

The primary function of a pulley block is to change the direction of a line or cable. By passing the rope through the pulley, the load's direction can be altered, enabling more efficient and controlled pulling or lifting in various directions.

Mechanical Advantage

When a line is run through a pulley block, it effectively creates a block and tackle system, providing a mechanical advantage. This allows for the application of less force on the pulling end while still achieving a significant increase in force on the load side.

Load Sharing

Pulley blocks are commonly used to distribute the load between multiple lines or ropes, preventing overloading of a single line and ensuring a safer lifting operation.

Rope Protection

The smooth and rounded surface of the pulley in a pulley block helps protect the rope or cable from sharp edges or abrasive surfaces, reducing wear and extending the life of the line.

Versatility

Pulley blocks come in various sizes and configurations, making them suitable for a wide range of applications and load capacities.

Pulley Block Key Components

Pulley

This is the core component, which guides the steel rope and allows it to pass through, transmitting the power.

Bearing

It helps the pulley rotate smoothly, reducing friction and improving operational efficiency.

Housing

It provides protection, preventing damage to the pulley and other internal components.

Steel Rope or Cable

This carries the load and works in conjunction with the pulley block.

Fixation Devices

These are used to secure the pulley block to the crane structure, ensuring its stability.

Pulley Block Size

Sheave Dia.	Capacity	Dimensions(mm)				Wire Rope Dia.	N.W.
mm	T	Hook A1	Eye A2	B	C	mm	kg
75	0.5	286	227	87	77	8	2.8
100	1	311.5	284.5	112	88	10	4.3
125	1.5	370	344	140	100	13	7.8
150	2	442.5	417	168	146	16	12.2
180	3	498	478	204	157	19	18.5
200	4	590.5	556	226	188	22	31
250	5	706.5	651	276	220	25	49.8
300	6	795	775	330	238	26	72
350	10	934	898	395	260	28	102

Pulley Block Used

01/

With gin poles in cell tower or tower crane erection.

02/

As a load multiplier on a marine mooring system allowing for greater pulling power but also control.

03/

Vehicle recovery; used with 4x4; first responders.

04/

Arborists use the tool to assist with lowering, lifting or dragging cut tree limbs.

05/

To re-direct line path from a winch system or improve its pulling capacity by up to 100%.

06/

To give mechanical advantage when lifting a load, or a multiplier block arrangement.

Packaging and Shipping

Packaging	Wooden box, PE film
Transportation methods	Road transport, rail transport, sea transport, air transport

Our Certificate

FAQ

Q: What is the purpose of a pulley block?

A: A pulley block gives direction to the rope while it's loaded. You then can increase the line or lift the weight of a hoist or winch by multiplying lines. The noticeable trait of a pulley block is that it is always closed, so you must thread the line through the axle.

Q: Is a sheave block the same as a pulley?

A: Sheave and pulley are terms that are often used interchangeably. A pulley mechanism in which the rope is mounted to the object and the pulley is attached to a fixed point. A simple machine that changes the direction of a force, generally to raise a load, is defined as a pulley.

Q: What is the mechanical advantage of a pulley block?

A: A single fixed pulley has a mechanical advantage of one. One pulley doesn't make a mechanical advantage, as the same amount of force is needed. However, if additional pulleys are added, a mechanical advantage is created. Using two pulleys together means you need half the force to lift.

Q: What is a sheave block used for in lifting?

A: Sheave blocks — These are essential tools for lifting and rigging operations. These blocks feature grooved wheels, known as sheaves, that guide ropes or cables to increase the lifting or pulling capacity.

As one of the leading pulley block manufacturers and suppliers in China, we warmly welcome you to wholesale pulley block made in China here and get quotation from our factory. All customized products are with high quality and competitive price.

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