China OEM 4D Series Cast Iron Qd Bushing Sheaves Pulley for D Belts pulley drive

Product Description

4D Series Cast Iron QD Bushing Sheaves Pulley for D Belts

Product Description

4D series four-groove QD bushed sheaves are manufactured for D-series classic v-belts and D-banded belts; they range from 12.64″ to 58.64″ in diameter. Depending on the sheave size, they are made to use an F, J, or M QD (quick detachable) bushings, which we also stock. Most of our 4D QD sheaves are manufactured from a high-strength grade 35 cast iron, are phosphate-coated, and are painted for anti-corrosion. All of them are balanced at the factory for smooth machinery operation.

Product Parameters

 

Size

Bushing Type

Type

Pitch Diameter

Outside Diameter

(E)

(F)

(L)

(M)

Sheave Weight (LBS)

4D120F F A 12.0″ 12.64″ 31/32″ 6-1/16″ 3-3/4″ 1-11/32″ 83
4D130F F A 13.0″ 13.64″ 31/32″ 6-1/16″ 3-3/4″ 1-11/32″ 86
4D135F F A 13.5″ 14.14″ 31/32″ 6-1/16″ 3-3/4″ 1-11/32″ 89
4D140F F A 14.0″ 14.64″ 31/32″ 6-1/16″ 3-3/4″ 1-11/32″ 92
4D145F F A 14.5″ 15.14″ 31/32″ 6-1/16″ 3-3/4″ 1-11/32″ 95
4D150F F A 15.0″ 15.64″ 31/32″ 6-1/16″ 3-3/4″ 1-11/32″ 99
4D155F F A 15.5″ 16.14″ 31/32″ 6-1/16″ 3-3/4″ 1-11/32″ 102
4C160F F A 16.0″ 16.64″ 31/32″ 6-1/16″ 3-3/4″ 1-11/32″ 106
4D180J J A 18.0″ 18.64″ 1/8″ 6-1/16″ 4-5/8″ 1-5/16″ 120
4D200J J A 20.0″ 20.64″ 1/8″ 6-1/16″ 4-5/8″ 1-5/16″ 132
4D220J J A 22.0″ 22.64″ 1/8″ 6-1/16″ 4-5/8″ 1-5/16″ 155
4D270J J A 27.0″ 27.64″ 1/8″ 6-1/16″ 4-5/8″ 1-5/16″ 193
4D330M M B 33.0″ 33.64″ 11/32″ 6-1/16″ 6-3/4″ 1-1/32″ 280
4D400M M B 40.0″ 40.64″ 11/32″ 6-1/16″ 6-3/4″ 1-1/32″ 348
4D480M M B 48.0″ 48.64″ 11/32″ 6-1/16″ 6-3/4″ 1-1/32″ 380
4D580M M B 58.0″ 58.64″ 11/32″ 6-1/16″ 6-3/4″ 1-1/32″ 420

 

Company Profile

 

HZPT is a professional manufacturer of mechanical parts. Our main products are belt pulleys, sprockets, taper sleeves, coupling, and other transmission parts. Its products are mainly exported to Germany, Britain, France, and other European countries, with an annual export value of 18 million US dollars, accounting for more than 65% of the total output. The annual output value reached 200 million yuan.

Our products all adopt international, European, and American advanced industrial standards, use precise and good processing equipment, develop reasonable production technology, apply efficient and flexible management systems, and improve the quality management system to ensure that the product quality is good and the price is affordable.

Our factory adheres to the enterprise concept of “quality: the basis of enterprise survival, integrity: the basis of enterprise development, service: the source of enterprise development, low price: the instrument of enterprise development.” We are always looking CHINAMFG to the presence of customers at home and abroad, seeking CHINAMFG benefits and joint cause development.

Warehouse Stock

The warehouse covers an area of 5000 square CHINAMFG and can provide all kinds of standard models A/B/C/Z, with complete quantity and large quantity in stock. Meanwhile, it accepts all sorts of non-standard customization for drawing production. The daily production capacity is 10 tons, and the delivery time is short.

Packaging & Shipping

 

Experienced Workers Packing Pulleys Carefully, safe wooden cases keep parts from being injured or damaged during sea or air shipment.

 

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Certification: CE, ISO
Pulley Sizes: Type F
Manufacturing Process: Forging
Material: Carbon Steel
Surface Treatment: Baking Paint
Application: Chemical Industry, Grain Transport, Mining Transport, Power Plant
Samples:
US$ 9999/Piece
1 Piece(Min.Order)

|
Request Sample

sheave pulley

Can compound pulleys withstand harsh environmental conditions?

Compound pulleys are designed to operate in various environmental conditions, but their ability to withstand harsh conditions depends on several factors, including the materials used, maintenance practices, and the severity and duration of the environmental conditions. Here is a detailed explanation of the factors that influence the ability of compound pulleys to withstand harsh environmental conditions:

  1. Materials: The materials used in the construction of compound pulleys play a crucial role in their ability to withstand harsh environmental conditions. Pulleys made from durable and corrosion-resistant materials such as stainless steel, aluminum, or high-strength polymers are more resistant to environmental factors like moisture, chemicals, and extreme temperatures. These materials offer better protection against rust, corrosion, and degradation, thus enhancing the durability and longevity of the pulleys.
  2. Sealing and Protection: Compound pulleys can be equipped with seals, covers, or protective coatings to enhance their resistance to harsh environmental conditions. Seals and covers help prevent the ingress of moisture, dust, debris, or contaminants, which can cause damage to the pulley components. Protective coatings like powder coating or galvanization provide an additional layer of protection against corrosion and abrasion. Proper sealing and protection measures can significantly improve the ability of compound pulleys to withstand harsh environmental conditions.
  3. Maintenance Practices: Regular maintenance is essential for ensuring the longevity and performance of compound pulleys, especially in harsh environmental conditions. Routine maintenance tasks such as cleaning, lubrication, and inspection help identify and address any signs of wear, damage, or deterioration caused by the environment. Proper maintenance practices, carried out as per the manufacturer’s guidelines, can extend the lifespan of compound pulleys and enhance their ability to withstand harsh conditions.
  4. Extreme Temperatures: Compound pulleys may be subjected to extreme temperatures in certain environments. High temperatures can cause thermal expansion, leading to increased stress on the pulley components. Low temperatures can make materials more brittle and increase the risk of cracking or breakage. Pulleys designed for harsh temperature conditions may incorporate features such as heat-resistant materials, thermal insulation, or cooling mechanisms to mitigate the effects of extreme temperatures and maintain their functionality.
  5. Moisture and Corrosion: Moisture and corrosive elements in the environment can pose a challenge to the durability of compound pulleys. Exposure to moisture can lead to rust, corrosion, or degradation of the pulley components over time. Pulleys designed for harsh environments often incorporate corrosion-resistant materials, protective coatings, or regular anti-corrosion treatments to minimize the impact of moisture and prevent premature deterioration. Proper maintenance, including cleaning and lubrication, is crucial to remove any accumulated moisture, debris, or corrosive substances and preserve the pulley’s integrity.
  6. Chemical Exposure: Compound pulleys used in environments with chemical exposure need to be resistant to the specific chemicals present. Certain chemicals can cause corrosion, deterioration, or degradation of the pulley materials. In such cases, pulleys made from chemically resistant materials or coated with chemical-resistant coatings are necessary to withstand the harsh chemical environment. It is important to select pulleys specifically designed and rated for the chemical exposure encountered in the environment.

While compound pulleys can be designed to withstand harsh environmental conditions, it is important to note that prolonged exposure to severe or extreme conditions may still affect their performance and lifespan. Regular inspection, maintenance, and adherence to manufacturer guidelines are essential to ensure the continued functionality and safety of compound pulleys in harsh environments.

sheave pulley

What is the significance of proper alignment and tensioning in compound pulley systems?

Proper alignment and tensioning are of utmost significance in compound pulley systems as they directly affect the performance, efficiency, and safety of the system. When compound pulleys are correctly aligned and appropriately tensioned, several benefits are realized. Here is a detailed explanation of the significance of proper alignment and tensioning in compound pulley systems:

  1. Optimal Mechanical Advantage: Proper alignment and tensioning ensure that the compound pulley system operates at its maximum mechanical advantage. The mechanical advantage is the ratio between the load being lifted and the force applied to the rope or cable. When the pulleys are aligned correctly and the tension is properly adjusted, the load is distributed evenly among the multiple lines of support, resulting in efficient force distribution and increased lifting capacity.
  2. Efficient Power Transfer: Correct alignment and tensioning minimize energy losses and enhance power transfer within the compound pulley system. When the pulleys are aligned, the ropes or cables move smoothly over the sheaves, reducing frictional losses. Proper tensioning ensures that the ropes or cables are neither too loose nor too tight, optimizing the power transfer from the input force to the load being lifted. This efficient power transfer results in improved system performance and reduced energy consumption.
  3. Prevention of Excessive Wear and Damage: Improper alignment and tensioning can cause excessive wear and damage to the components of the compound pulley system. Misalignment can lead to uneven loading on the ropes or cables, causing them to rub against the sheaves or other parts of the system. This friction can result in accelerated wear, deformation, or even failure of the ropes, cables, sheaves, or bearings. Proper alignment and tensioning help distribute the load evenly, minimizing wear and extending the lifespan of the system components.
  4. Reduction of Stress and Fatigue: Correct alignment and tensioning reduce stress and fatigue on the ropes or cables, as well as on the pulley system itself. When the ropes or cables are properly tensioned, they experience less strain during the lifting or lowering process. This reduces the risk of overloading and premature failure of the ropes or cables. Additionally, proper alignment ensures that the forces are evenly distributed, preventing excessive stress on individual components of the pulley system and promoting its longevity.
  5. Enhanced Safety: Proper alignment and tensioning contribute to the overall safety of the compound pulley system. Misalignment or improper tensioning can lead to unexpected movements, jerks, or loss of control during lifting operations. This can pose a significant safety hazard to operators and bystanders. By ensuring proper alignment and tensioning, the system operates smoothly, minimizing the risk of accidents, injuries, and damage to property.

In summary, proper alignment and tensioning are crucial for the optimal performance, efficiency, and safety of compound pulley systems. They enable the system to operate at its maximum mechanical advantage, facilitate efficient power transfer, prevent excessive wear and damage, reduce stress and fatigue, and enhance overall safety. Regular inspection and maintenance should be carried out to ensure that compound pulley systems remain properly aligned and tensioned throughout their lifespan.

sheave pulley

What is a compound pulley, and how does it function in mechanical systems?

A compound pulley is a type of pulley system that consists of multiple fixed and movable pulleys working together to provide mechanical advantage in lifting or moving heavy loads. Here is a detailed explanation of what a compound pulley is and how it functions in mechanical systems:

A compound pulley is composed of two or more pulleys, which are connected by a continuous loop of rope, cable, or belt. The pulleys are arranged in such a way that some are fixed to a support structure, while others are movable. The rope or cable wraps around the pulleys, creating multiple line segments that support the load.

The primary function of a compound pulley is to multiply the force applied to the rope or cable, allowing the user to lift or move heavy loads with less effort. This mechanical advantage is achieved through the distribution of the load’s weight across multiple line segments and the reduction of the force required to lift the load.

When a force is applied to the free end of the rope or cable, the movable pulleys in the compound pulley system move in response. As the movable pulleys move, the length of rope or cable on one side of the pulley system decreases while the length on the other side increases. This movement causes the load to be lifted or moved.

The mechanical advantage provided by a compound pulley is determined by the number of line segments supporting the load. Each additional segment of rope or cable increases the mechanical advantage of the system. For example, a compound pulley with three line segments supporting the load provides a mechanical advantage of three, meaning the force applied to the rope or cable is multiplied by three.

Compound pulleys are commonly used in various mechanical systems, including cranes, hoists, elevators, and block and tackle systems. They are particularly useful in situations where heavy loads need to be lifted or moved with reduced effort or where space constraints make it challenging to incorporate larger, single-pulley systems.

It is important to note that while compound pulleys can provide mechanical advantage, they also introduce some trade-offs. As the mechanical advantage increases, the distance through which the rope or cable needs to be pulled also increases. Additionally, compound pulley systems may introduce some friction and inefficiency, requiring regular maintenance and lubrication to ensure smooth operation.

In conclusion, a compound pulley is a pulley system that utilizes multiple fixed and movable pulleys to provide mechanical advantage in lifting or moving heavy loads. By distributing the load across multiple line segments, compound pulleys reduce the force required to lift the load, making them valuable components in various mechanical systems.

China OEM 4D Series Cast Iron Qd Bushing Sheaves Pulley for D Belts   pulley driveChina OEM 4D Series Cast Iron Qd Bushing Sheaves Pulley for D Belts   pulley drive
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