Product Description

   ZheJiang Machinery & Equipment Import & Export Co., Ltd. (HBMEC), founded in 1978, is a combination of industry and trade, technology and trade of the state-owned professional foreign trade company. After more than 40 years of reform and development, our company has made remarkable achievements in its import and export business, and has established trade relations with more than 100 countries and regions.
 
Our products and Services as following, including:
   —- Various kinds of machinery and parts, especially raw castings and finished machined parts, fabrications. The filed covers: Fittings and couplings. Auto parts, Trailer parts, Agricultural machinery parts, Railway parts, Crusher parts, Pump parts, Valve parts,etc.
   —- Steel/Stainless steel fabricated parts, rubber gaskets and plastic parts. The process covers: Laser cutting, Punching, Stamping,Welding, etc  For construction, industrial supply etc.
   —- Other products processed according to your drawings and samples. 
 
We provide following services:
   —- Buying & Sourcing Agent, mainly in Machinery & Equipments & Spare parts filed.
   —- Import & Export Agent service.

   We know OEM and customer requirements well. We are Professional OEM spare parts provider for industrial supply, can be used in the food machinery industry, packaging machinery industry.

   We have a professional team, including engineers and mechanical engineering, responsible for supervising production and quality control.  Being an ISO9001 certified company, with our quality control system, you can get high quality products with fairly low costs. 
 
    Welcome to contact us freely! 

– PRODUCT DETAILS –

– HONOR & QUALIFICATION –

    Since 2000, we have been maintaining certification, standardizing the company’s business activities in accordance with the requirements of quality management system standards, and taking increasing customer satisfaction as our business purpose.

– FACTORY –

– PACKAGE & SHIPPING –

Packaging steps: 
Each piece put in on carton box, wood case, Plastics Packaging, pallet, etc.
Mode of shipping: 
Shipping by air, sea or car.
By sea for batch goods;
Customs specifying freight forwarders or negotiable shipping methods.

– OUR SERVICES –

1. Could make product for customer according to customer samples or drawings.
2. Can deal with various drawings soft wares:  PRO/E,  Auto CAD,  Slid Work,  UG, etc.
3. Could offer samples for free if the sample is simple and low value.
4. Submit samples with official inspection reports including  material report,mechanical property report and dimensional report.
5. Can provide the third party inspection report.
6. Could provide at least 1 year quality guarantee after customer receives the products.
7. We could supply storage service for customer if required.

– FAQ –

Q1. How can we quote for you?
Please  send  us enquiry  by email, with all  the  technical  drawings  you  have. Such  as  material  grade,  tolerance,  machining  demands,  surface  treatment, heat treatment, mechanical property requirements, etc. Our specialized engineer will check and quote for you, we would appreciate the opportunity and will respond in 3-5 working days or less. 
Q2. How can I get a sample to check your quality?
After price confirmed, you can requiry for samples to check quality.
If you need the samples, we will charge for the sample cost.
But the sample cost can be refundable when your quantity of first order is above the MOQ.
Q3. Can you do OEM for us?
Yes, the product packing can be designed as you want.
Please feel  free to contact us if you have any question.

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 two 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 two blocks is the total tension and the force acting on the pulley is the weight of the two blocks.
This simple mechanism uses two 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 three 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 two 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 one “V” groove. V-belt pulleys are commonly used in vehicles and electric motors.
Composite pulleys are made from more than one 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 three 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 one 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 two 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 four times their force when used in hydraulic lifts.