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) | |
|---|
| Customization: |
Available
| Customized Request |
|---|
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:
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
How are compound pulleys used in the operation of cranes and elevators?
Compound pulleys play a crucial role in the operation of cranes and elevators, enabling them to lift and move heavy loads with ease and efficiency. The design and arrangement of compound pulleys provide mechanical advantage, allowing for the multiplication of force and the reduction of effort required to lift objects. Here is a detailed explanation of how compound pulleys are used in the operation of cranes and elevators:
Crane Operation:
In cranes, compound pulleys are commonly used in the lifting mechanism to handle heavy loads. The pulleys are arranged in a system of ropes or cables, with multiple sheaves connected in series or parallel. The ropes or cables pass through the sheaves, creating multiple lines of support. The combination of fixed and movable pulleys in the system increases the mechanical advantage, making it easier to lift heavy objects. When force is applied to the rope or cable, the compound pulleys distribute the load and reduce the amount of force required from the operator.
Elevator Operation:
In elevators, compound pulleys are utilized in the hoisting system to move the elevator car vertically. The pulleys are typically located at the top of the elevator shaft. The elevator car is suspended by ropes or cables that pass over the sheaves of the compound pulleys. The mechanical advantage provided by the pulley system allows the elevator motor to exert less force to lift the car. The compound pulleys effectively distribute the weight of the car, making it easier to move up and down. Additionally, the design of the pulley system allows the elevator car to be lifted and lowered smoothly and safely.
Both in cranes and elevators, compound pulleys offer the following advantages:
- Increased Lifting Capacity: The mechanical advantage provided by compound pulleys allows cranes and elevators to lift much heavier loads than what could be achieved with a single pulley system. The compound pulleys distribute the load over multiple lines of support, reducing the strain on individual ropes or cables and enabling the lifting of heavier objects.
- Efficiency: Compound pulleys increase the efficiency of cranes and elevators by reducing the amount of force required to lift or lower loads. The mechanical advantage achieved through the arrangement of pulleys allows operators to lift heavy objects with less effort, making the operation more efficient and less fatiguing.
- Precise Control: Compound pulley systems offer precise control over the movement of cranes and elevators. By adjusting the tension and arrangement of the ropes or cables, operators can control the speed and direction of the lifting or lowering process. This precise control allows for safe and accurate positioning of loads in various applications.
- Smooth Operation: The combination of fixed and movable pulleys in compound pulley systems helps ensure smooth and stable operation of cranes and elevators. The pulleys reduce the friction between the ropes or cables and the sheaves, minimizing jerky movements and providing a smooth lifting or lowering experience.
In summary, compound pulleys are essential components in the operation of cranes and elevators. Their mechanical advantage, increased lifting capacity, efficiency, precise control, and smooth operation make them ideal for handling heavy loads and facilitating vertical transportation in various industries and settings.
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.
editor by CX
2024-05-03