China Good quality 250kg 3m Manual Chain Hoist Pulley Manufacturer pulley system

Product Description

250KG 3M manual chain hoist pulley manufacturer 

Capacity: From 0.25T to 30T

·Durable and reliable, this ultra-light hoist can be operated with minimum manual power.
·Working Temperature: -40ºC -+ 60ºC.
·Specially heat-treated top and bottom hooks are strong and durable enough for the toughest of jobs. The design of the bottom hook, with relatively large dimensions, makes it easy to stabilize a load in the proper position.
·Unique ball and needle bearings provide a remarkable boost to mechanical efficiency; generating high output power with minimum manual input.
·The load chain is made of an exclusively developed, heat-treated special steel alloy.

Quality features:
1. Wheel cover with guide slots guard against jamming and slipping of chain.
2. Forged swivel hooks and latches prevent twisting of chain and reduce unintentional unhooking of the unit or the load.
3. Chain guide and stripper ensures proper fit of chain over pocket wheel.
4. Two-stage gear reduction with hardened gears and pinion.

Chain block drawing


Model CB-B
Capacity(ton) 0.25 0.5 1 1.5 2 3 5 7.5 10
Standard lifting height(m) 2.5 2.5 2.5 2.5 2.5 3 3 3 3
Running Test Load(ton) 0.3125 0.625 1.25 1.875 2.5 3.75 6.25 9.375 12.5
Headroom H(mm) 280 345 376 442 470 548 688 765 765
Effort to required to lift max. load(N) 226 235 245 255 324 363 353 373 380
Load Chain Dia. (mm) Columns 1 1 1 1 1 1 2 3 4
Dia+Pitch 4× 12 5× 15 6× 18 7× 21 8× 24 10× 28 9× 27 9× 27 9× 27
Dimension(mm) A 121 148 172 196 210 255 280 433 463
B 114 132 151 173 175 205 189 189 189
C 24 25 30 33 35 40 42 56 56
D 31 31.5 37.5 42.5 45 50 53 85 85
Net Weight(kg) 6.5 9.3 12.2 16.5 19.5 32 41.1 61.6 75.7
Packing Measurements(l× w× h)(mm) 23× 16× 15 30× 17× 18 32× 18× 19 37× 20× 24 37× 20× 24 43× 40× 30 47× 44× 35.5 62× 47× 39.5 53× 51× 46.5
Extra Weight per meter of extra lift(kg) 0.81 1 1.29 1.61 1.92 2.68 4.1 5.86H 7.73


Application: Bridge Crane, Small Crane, H-Beam
Type: Manual Chain Hoist
Sling Type: Chain
Lift Speed: Manually
Maximum Lifting Height: as Per Operator
Chain Falls: 1


Customized Request

crane pulley

How do you select the right crane pulley configuration for a specific lifting task?

When selecting the appropriate crane pulley configuration for a specific lifting task, several factors need to be considered. Here's a detailed explanation:

Selecting the right crane pulley configuration is crucial to ensure safe and efficient lifting operations. The following steps can help in the selection process:

  1. Determine the Load: Start by understanding the characteristics of the load to be lifted. Consider factors such as its weight, dimensions, shape, and stability. This information will help determine the required load capacity and the number of sheaves needed in the pulley system.
  2. Assess the Lifting Mechanism: Evaluate the lifting mechanism of the crane being used. Different crane types, such as mobile cranes, tower cranes, or overhead cranes, may have specific requirements for pulley configurations. Consider the crane's capacity, lifting speed, and available lifting points to ensure compatibility with the desired pulley configuration.
  3. Determine the Required Mechanical Advantage: Calculate the mechanical advantage required for the lifting task. This involves considering the weight of the load and the force available from the lifting equipment. The mechanical advantage helps determine the number of sheaves required in the pulley system to achieve the desired lifting capacity and ease of operation.
  4. Evaluate Environmental Factors: Take into account the environmental conditions in which the lifting task will be performed. Factors such as temperature, humidity, dust, and corrosive substances can affect the choice of pulley materials and their durability. In harsh environments, heavy-duty pulleys with corrosion-resistant properties may be necessary.
  5. Consider Load Control and Precision: Determine the level of control and precision required for the lifting task. Some applications may require fine adjustments, precise positioning, or smooth movements. In such cases, pulleys with features like swivel capabilities or adjustable positioning may be necessary to achieve the desired level of control.
  6. Review Safety Requirements: Ensure compliance with safety regulations and standards. Consider incorporating safety features such as load limiters or overload protection devices in the pulley system to prevent accidents and protect the crane and personnel involved in the lifting operation.
  7. Consult Manufacturer Guidelines: Refer to the manufacturer's guidelines and specifications for the crane and pulley system. Manufacturers often provide recommendations and guidelines for selecting the appropriate pulley configuration based on specific crane models and lifting tasks.

By following these steps and considering the load, lifting mechanism, mechanical advantage, environmental factors, load control requirements, safety regulations, and manufacturer guidelines, it is possible to select the right crane pulley configuration for a specific lifting task. Proper selection ensures that the pulley system is capable of safely and efficiently handling the load, providing the necessary control, precision, and safety measures throughout the lifting operation.

crane pulley

Can crane pulleys be used in various types of cranes, including mobile and overhead cranes?

Yes, crane pulleys can be used in various types of cranes, including mobile and overhead cranes. Here's a detailed explanation:

Crane pulleys are a fundamental component in the lifting mechanism of cranes. They are versatile and can be incorporated into different crane designs and configurations to facilitate the lifting and movement of heavy loads. Here are examples of how crane pulleys are used in different types of cranes:

  • Mobile Cranes: Mobile cranes, such as truck-mounted cranes, rough-terrain cranes, or all-terrain cranes, are designed to be easily transportable and provide flexibility in various job sites. These cranes often utilize crane pulleys in their lifting systems. The pulleys are typically integrated into the boom structure or the jib, allowing for efficient load lifting and movement. The mechanical advantage provided by the pulleys helps mobile cranes handle heavy loads with ease.
  • Overhead Cranes: Overhead cranes, also known as bridge cranes or gantry cranes, are commonly used in industrial settings, warehouses, and manufacturing facilities. These cranes are designed to traverse along beams or tracks installed overhead. Crane pulleys play a crucial role in the lifting mechanism of overhead cranes. They are mounted on the crane's trolley or hoist assembly, enabling vertical lifting and horizontal movement of loads along the crane's span. The pulleys provide the necessary mechanical advantage to lift heavy loads and facilitate precise positioning within the working area.
  • Tower Cranes: Tower cranes are commonly used in construction sites to lift and move heavy construction materials and equipment to tall heights. These cranes feature a vertical tower structure and a horizontal jib that can rotate. Crane pulleys are an integral part of the tower crane's lifting mechanism. They are typically located at the top of the tower and are used in conjunction with the hoist system to lift and lower loads. The mechanical advantage provided by the pulleys allows tower cranes to handle heavy loads at significant heights.
  • Crawler Cranes: Crawler cranes are large, heavy-duty cranes that utilize tracks or crawlers for mobility. These cranes are often used in construction, mining, and other rugged environments. Crane pulleys are employed in the lifting system of crawler cranes to facilitate load lifting and movement. They are incorporated into the boom structure and work in conjunction with the hoist system to provide the necessary lifting force and mechanical advantage.

In summary, crane pulleys are versatile components that can be used in various types of cranes, including mobile cranes, overhead cranes, tower cranes, and crawler cranes. They play a critical role in the lifting mechanism, providing the required mechanical advantage to handle heavy loads and facilitate efficient and safe lifting operations.

crane pulley

What is a crane pulley, and how is it used in lifting and hoisting operations?

A crane pulley is a type of pulley specifically designed for lifting and hoisting operations in crane systems. It plays a crucial role in the mechanical advantage and efficiency of the lifting process. Here's a detailed explanation of what a crane pulley is and how it is used in lifting and hoisting operations:

Definition and Design:

A crane pulley is a wheel or a set of wheels with a grooved rim designed to guide and support a lifting cable or rope. It typically consists of a central axle, known as the sheave, mounted on a frame or housing. The sheave has a groove around its circumference to accommodate the lifting cable or rope. The design of the pulley may vary depending on the specific crane system, load capacity, and application requirements.

Mechanical Advantage:

The primary purpose of a crane pulley is to provide a mechanical advantage in lifting and hoisting operations. By utilizing a combination of fixed and movable pulleys, the pulley system effectively multiplies the force applied by the crane operator. This mechanical advantage allows for the lifting of heavier loads with reduced effort. The number and arrangement of pulleys in the system determine the degree of mechanical advantage achieved. Common configurations include single pulley, double pulley, and multiple pulley systems.

Load Distribution:

A crane pulley helps distribute the load evenly across the lifting cable or rope. As the cable wraps around the sheave, the load is spread over a larger surface area, reducing the stress and potential wear on the cable. This load distribution is essential for maintaining the integrity and safety of the lifting system. The groove on the sheave ensures that the cable remains properly aligned and securely seated during the lifting operation.

Directional Changes:

In lifting and hoisting operations, a crane pulley is also used to change the direction of the lifting force. By redirecting the cable or rope, the pulley allows the load to be lifted vertically or moved horizontally as required. This directional flexibility is particularly useful in complex lifting scenarios where precise positioning or maneuvering of the load is necessary.

Wire Rope Support and Protection:

A crane pulley provides support and protection to the wire rope or lifting cable. The groove on the sheave prevents the rope from slipping or twisting during the lifting process. It also minimizes friction between the rope and the pulley, reducing wear and extending the rope's lifespan. Some crane pulleys incorporate additional features such as bearings or bushings to further enhance the smooth operation of the pulley system.

Application in Crane Systems:

Crane pulleys are integral components of various crane systems, including overhead cranes, tower cranes, mobile cranes, and gantry cranes. These systems are commonly used in construction sites, manufacturing facilities, ports, and other industrial settings for lifting and moving heavy loads. The crane pulley, along with other components such as the hoist motor, wire rope, and control mechanisms, enables precise and controlled lifting operations.

In summary, a crane pulley is a specialized pulley used in lifting and hoisting operations. It provides a mechanical advantage, distributes the load, changes the direction of the lifting force, and supports the wire rope or lifting cable. Crane pulleys are essential components in crane systems and play a crucial role in ensuring the efficiency, safety, and effectiveness of lifting operations.

China Good quality 250kg 3m Manual Chain Hoist Pulley Manufacturer   pulley system	China Good quality 250kg 3m Manual Chain Hoist Pulley Manufacturer   pulley system
editor by CX


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