Product Description

Nylon Sheave Wire Lifting Pulley Block

This aluminum alloy and MC nylon open type hoisting tackle with hook possesses light dead weight, which is equipped with the aluminum alloy side panel and the MC nylon sheave. This single Sheave Pulley block is the open type. Our product can be used for lifting heavy objects and other operations in the line construction.
 

 

Main Specifications

Item Number	Model	Number of Sheave	Rated Load (kN)	Outer Diameter of Sheave ×Sheave Width (mm)	Rope Diameter (mm)	Weight (kg)	Hoisting Point Type
11101	QHN1-1K	1	10	Φ100×31	Φ7.7	1.8	G	H
11102	QHN1-2	2	10	Φ80×27	Φ6	1.8	G	H
11103	QHN1-3	3	10	Φ80×27	Φ6	2.1	G	H
11111	QHN2-1K	1	20	Φ120×35	Φ9.3	2.2	G	H	B
11112	QHN2-2	2	20	Φ100×31	Φ7.7	2.6	G	H
11113	QHN2-3	3	20	Φ100×31	Φ7.7	3.7	G	H
11121	QHN3-1K	1	30	Φ150×39	Φ11	3.4	G	H	B
11122	QHN3-2	2	30	Φ120×35	Φ9.3	4.5	G	H
11123	QHN3-3	3	30	Φ100×31	Φ7.7	4.6	G	H
11131	QHN5-1K	1	50	Φ166×40	Φ13	5.2	G	H	B
11133	QHN5-2	2	50	Φ150×39	Φ11	5.5	G	H
11134	QHN5-3	3	50	Φ120×35	Φ9.3	5.1	G	H
11141	QHN8-1K	1	80	Φ205×49	Φ17	7.2	G	H	B
11142	QHN8-2	2	80	Φ166×40	Φ13	8.3	G	H
11143	QHN8-3	3	80	Φ150×39	Φ11	7.9	G	H
11151	QHN10-1K	1	100	Φ246×60	Φ18.5	11.4	G		B
11152	QHN10-2	2	100	Φ166×40	Φ13	10.2		H
11153	QHN10-3	3	100	Φ150×39	Φ11	11.7		H
11161	QHN15-1K	1	150	Φ280×65	Φ21.5	12.1			B
11162	QHN15-2	2	150	Φ205×49	Φ17	12.8		H
11163	QHN15-3	3	150	Φ166×40	Φ13	11.8		H
11164	QHN15-4	4	150	Φ150×39	Φ11	13.9		H

Uses:Applied in line construction for lifting weight.
Features:Adopt aluminum alloy side panel and MC nylon sheave.so it is light in weight.the single sheave hoisting tackle is open style.

1. Training and services.
Marshine is a company specializing in the development, design and manufacture of electrical construction equipment and tools. We not only manufacture and sell international standard products, OEM and custom products, but also provide quality tracking and service monitoring.

2. How about the quality of your products?
Our products are manufactured in strict accordance with national and international standards, and each product is tested before delivery. If you would like to view our quality certification and various test reports, please consult us.

3. Why do you choose us?
Because we can provide you with excellent service, quality and reasonable price. In addition, we can also provide smooth delivery of goods, excellent customer solutions.

4. Customer inquiry.
If there is an emergency, customers can also use online contact methods (online Chat, Skype, WhatsApp, ) for faster and better communication. Any enquiry will be answered within 12 working hours.

5. How to obtain samples?
We can provide free samples to the buyer for testing, but the buyer needs to pay the freight. Existing samples take 2-3 days. If there is no stock, we will advise the delivery date.

6. How about packing and shipping?
All goods will be packed in plywood boxes for safe, long haul transport. Support EXW, FOB, CIF, CFR terms.
Required documents such as packing list, commercial invoice, bill of lading, air waybill, CO, Form E, Form F etc will be provided.

Note: If you do not find the product you need, please feel free to contact us. We will provide the best quotation as soon as we verify your requirements.

 

Types of pulleys and their advantages and disadvantages

There are several types of pulleys. Learn the basic equations of the pulley system. Then learn about the different uses for pulleys. The disadvantages of using pulleys will be covered. Knowing these, you can buy the pulley that suits your needs. Here are some of the best pulley types and their pros and cons.

Basic equations of pulley systems

A pulley system is a mechanism that allows 2 blocks of a certain mass to be connected by a taut rope. The acceleration of each block is the same in magnitude and direction. The external force acting on each block is the weight of the block (10g) and the tension in the string. The tension between the 2 blocks is the total tension and the force acting on the pulley is the weight of the 2 blocks.
This simple mechanism uses 2 simple equations to explain how the system works. First, the mass of the weight on both sides of the pulley must be the same. When the weight is forced to move, the rope tightens and the second pulley descends. The weight is also attached to the second pulley and must be the same distance as the first pulley. This will result in a speed ratio of 2 times the distance covered by the first pulley.
Second, we have to calculate the force required to lift the object. The lower mass is supported by a wire configuration passing through all pulleys, while the uppermost pulley is used to apply the force. The lower block is used to support the weight. The applied force needs to travel a distance nx to move the weight. This distance, called MA, can be written as:
Once we have gathered the necessary information, we can apply the calculations to the pulley system. We can also use the Mechanical Advantage Calculator to calculate the force on the anchor. To do this, we must apply a force to the load as well as to the pulley itself. Using this equation, we can calculate the force required by the load to lift the load.

Types of pulleys

There are 3 basic types of pulleys: movable, fixed and compound. Both types of pulleys translate the force applied to them. The ideal mechanical advantage of pulleys is two. This is because a single movable pulley only doubles the force, whereas a compound pulley doubles or triples the force. This type of pulley is often used with other types of pulleys.
Movable pulls move with the weight of the load, and the force pulling them increases on the lift side. They are often found in utility elevators and construction cranes. These systems are very simple, inexpensive and quiet to use. The force required to lift the object depends on the mechanical advantage of the system. The 2 most common types of pulleys are listed below. Let’s take a closer look at each one.
V-shaped pulleys are used in vehicles and electric motors. These pulleys require a “V” belt to function properly. Some have multiple “V” grooves to avoid slipping. They are used in heavy duty applications to reduce the risk of power slip. These pulleys also have more than 1 “V” groove. V-belt pulleys are commonly used in vehicles and electric motors.
Composite pulleys are made from more than 1 type of cable or rope wrapped around the wheel. They can be fixed or hinged and are usually made of stainless steel or bronze. Composite pulleys have multiple layers and can be a single unit or many different components. There are 3 main types of pulleys: fixed pulleys and composite pulleys. These are the most common types. Almost every type of pulley is used for some type of application.
Fixed pulleys have 1 advantage over movable pulleys: they change direction as the weight of the load increases. They are typically used in heavy construction equipment. Gun tackles, patio tackles, and stationary tackles are examples of equipment that use a pulley mechanism. These devices are very common and can be found on most modern construction sites. They provide great convenience for lifting large loads.

application

What are the applications of pulleys? Simply put, a pulley is a mechanical device that transforms a difficult task into an easier one. It consists of ropes and pulleys. It is usually used to lift objects. Usually, people wrap a rope around a pulley and pull up to lift the object. One disadvantage of using pulleys is that they require the same force as lifting the object directly.
One of the most popular applications of pulleys is lifting heavy objects. They help people pull up heavy objects and blocks. The system can also be used in seeders, lifts, grinders, etc. Other applications include raising flags, loading cargo, pulling curtains and rock or mountain climbing. Students can learn about the various uses of pulleys and the physics behind them.
Pulleys can be made of many different materials, depending on the application. Some are movable, which means they move with the object they are used to lift. This pulley system can be made of nylon, wire rope or fiber material. The best part about these systems is that they are easy to install and maintain. For a better grasp, use the guide or video tutorial to learn more about the pulley system and how it works.
Tapered pulleys are common in paper mills. They are high-quality pulleys that transmit power to connected parts. They can be dynamic or static and have different balances. Because pulley systems are highly customized, most industrial applications require systems designed specifically for specific applications. In this way, the system is safe, simple and inexpensive. The benefits of this design are endless.
The most common use of pulleys is for motor drives. They are used to minimize noise by applying force to the shaft to reduce the workload. They are also less expensive than gears and do not require lubrication. Furthermore, they can change the direction of the applied force. They are also less expensive than gears and are often used with other components. A screw is a cylindrical member with helical ribs used to connect something.

shortcoming

Although the pulley system makes it easier to move heavy objects, it still has some drawbacks. When using a pulley system, you must remember that the force required to lift the weight increases with the number of cycles. In addition, the distance between the puller and the heavy object increases, which may lead to accidents. Also, moving heavy objects can be tricky if the rope slips. Pulley systems are not very expensive and can be easily assembled. However, it does require a lot of space.
First, it is not efficient. Besides being inefficient, pulleys produce different forces at different speeds. Fixed pulleys use more force than the load, while movable pulleys move with the load. A movable pulley requires less force than a fixed pulley, but the combined system travels a long distance. Therefore, this method is not as efficient as the fixed method.
Pulleys are not only used in industrial processes. You can see them in various places in your daily life. For example, large construction cranes use pulleys to lift heavy loads. Even flagpoles, blinds, clotheslines, ziplines, motors and climbing equipment use pulleys. Still, despite their advantages, the disadvantages are not too serious.
Another disadvantage of the pulley is its wear and tear. While a pulley’s housing is theoretically infinite, its bearings and locking components typically wear out over time. To overcome this problem, a new bearing and locking assembly can be installed. No need to replace the housing and shaft, the entire assembly can be re-bonded and painted to replicate the original look. Alternatively, the pulley can be replaced with a new housing and shaft.
Using pulleys can also reduce the advantage of pulleys. On the other hand, interception and tackle is a system in which 2 pulleys are connected to each other using ropes. Unlike pulleys, pulley pulley systems can be adjusted in the direction of travel and can move heavy loads up to 4 times their force when used in hydraulic lifts.