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Product Description

COMPANY INTRODUCTION

HangZhou Worth Engineering Technology Co., Ltd. founded in 2001 , Company is located in the Chinese ancient city — HangZhou. Our company has been engaged in producing custom made engineering accessories, OEM/ODM spare parts and industrial components for many years, including sand casting parts and investment casting spare parts, forging parts, sheet metal stamping spare parts, machined parts and plastic parts, which are widely used in petrochemical, automobile, chemical, environmental protection , machinery, construction, agriculture, aerospace, marine hardware and other industries.
 

GRAY IRON/DUCTILE IRON/ CARBON STEEL/ ALLOY STEEL/ALUMINUM SAND CASTING 

Sand casting accessories and cnc machining part for engine, refrigerator and air conditioner, fan, compressor, pump, flange, washer, coupling, gearbox case, shaft, valve and strainer, tractor, automotive, motor rotor, electronic case, computer,  water treatment equipment. Weight of products range from 0.5kgs to 10tons. The usually used materials are ductile iron, gray iron, high chrome iron, many kinds of steel, brass, copper, aluminum and wear resistant material, etc.
Process: sand casting+cnc machining+deburrs
Tolerance: +/-0.005mm
Surface: deburrs,degrease,chamfer
Service available: OEM & ODM
Quality control: 0 defects,100% inspection before packing
Delivery time: 30 days after confirm the drawing
Packing:   Inner:bubble poly bag; Outer:5 layers ctn box or poly wooden box/pallet
Logistics service:  sea,air,express,EXW,FOB,CIF,DDU,DDP

Warranty:   100% refund or replacement for NOK pcs

Our Services

1, R&D service                       2, Drawing design service
3, Samples service                  4, Bulk production service
5, Inspection service               6, Packing&shipping service

Packaging & Shipping

1.Packing: 
Inside:bubble bag
Outside:carton case or poly wooden case
2.Shipping: 
Small batch by courier, large batch by sea or air

Certifications

1. ISO9001-2008
2. SGS
3. Material Certificate
4. CIQ…

Company Capabilities:

(1).CNC machining parts
(2).The fabrication
(3).The mechanical assemble
(4).The Surface treatment

Plating :3+Cr,environmental,anti-corrosion maximum 480 hours salt spray test
Coating:powder coating,electrcial coating,maximum 480 hours salt spray test
Painting:environmental EXPOSY painting,cross-cutting test
Polish:satin polish,mirror polish,electrical polish, maximum 1200 grid
Dacromet:evironmental,anti-corrosion,maximum 560 hours salt spary test
Anodization:tumble,shot blast,sand blast…..,various color,maximum 480 hours salt spray test
Nylok:tight-locking,environmental,5 million times
Heat Treatment:adjust the mechanical properties,temper,normalization,quench……
(5).The Variousl Material
stainless steel:SS304,SS304L,SS316,SS316L,SS430,SS201……
aluminium:7075,6061,6063,5082,5051,2014…….
brass:H62,H58,H59……
steel:C20,C45,C60,C35……
steel alloy:25CrMo,42CrMo,25Cr,40Cr,Q345,11SMn30……
iron cast:QT600,QT250,HT450,HT150……
titanium alloy:GR2,GR5,GR7,GR9……
tungsten alloy:WuNiFe alloy,Carbide Wolfram……
the blanks:stamping parts,forging parts,die casting parts,profile,extrusion……
the plastic:PP,PE,POM,Acrylic,ABS,Delrin……

COMPANY EQUIPMENTS

TESTING FAXIHU (WEST LAKE) DIS.TIES

THE PACKAGE AND SHIPMENT

CUSTOMERS

 

FAQ
 

Q1. How to customize products?                                                                                                
A2: Attach your drawings with details (material, surface treatment, quantity and special requirements etc).    

Q2: Can you make the parts based on the sample?
A3: Yes, we could provide a rough cost and will measure and design the drawing according your sample.

Q3: Can my design be safe after sending it to you?
A5: We can sign the NDA before you send it.
                                                                                                                                                                                                   
Q4. How long will it take to get the quotation?                                                                       
A6: We will give you the quotation within 24 hours (Considering the time difference).    
         
Q5. How does the company control the quality?                                                                  
A7: Inspection product with professional equipment , like CMM, height gauge, caliper & micrometer, Ultrasonic fault detector, Hardness tester, Spectrum analyzer, impact testing machine, quadratic equipment .

 

 

Pulley Type

There are several types of pulleys. These include fixed pulleys, load multipliers and movable pulleys. Below is a description of each pulley type. A load multiplier is a special type of pulley with multiple wheels for increased lifting capacity. It is used in a wide range of applications including power transmission and construction. Some common uses of pulleys are listed below.

moving pulley

Movable pulleys work by transferring the weight of a load to another object of the same mass. Since a live pulley is inherently frictionless and weightless, the force required to lift a load with it is the same as the weight of the load. This principle applies to tall buildings and residences. It is an excellent choice for lifting heavy objects such as furniture and washing machines.
A pulley is a mechanical device with a wheel that rotates on a shaft. The axle is attached to the wheel and is usually fixed. The movable pulley can be fixed or movable, both of which can change the direction of the force on the rope. Some pulleys can also change the magnitude and direction of the force. They are ideal for a variety of applications, from lifting heavy objects to transporting objects.
Another type of movable pulley works by transmitting force to another object. It has a free axis and the total force provided by the rope tension is balanced. Since the tension on the rope is constant in each segment, pulling 1 end of the rope will double the force on the shaft, resulting in 2 mechanical advantages. This mechanical advantage is the main reason why movable pulleys are so versatile.
Another form of moving pulley is called a KWL diagram. The KWL diagram summarizes the basic concepts of the drive wheel. KWL diagrams are an excellent way to assess a student’s understanding of the concepts discussed in the course. Word questions are a great way to check whether students understand concepts. When students answer the word questions correctly, the answer is yes!
pulley

Fixed wheel pulley

If you need to move heavy objects, a single fixed wheel pulley is not a good choice. Using a single fixed pulley might be similar to using a handbag, but it’s not very convenient. This type of pulley system relies on friction to transmit motion. As a result, it can slip and isn’t always reliable. Fortunately, you can find other options that work just as well.
Fixed pulleys are the most basic type of pulley. They consist of grooved wheels and ropes attached to objects. These pulleys make lifting easier. Because the rope or cable only moves in 1 direction, the movement of the object feels lighter. And they are also easy to install. However, before you buy a fixed wheel pulley, make sure it is strong enough to support the weight of the load.
The disadvantages of fixed pulleys are obvious. One of them is the lack of mechanical advantage. A fixed pulley pulls up with the same force as a single moving pulley, and a single fixed pulley is not particularly effective as a force multiplier. However, the effect is more pronounced when you combine multiple fixed-wheel pulleys. You will get double the power! So what do fixed wheel pulleys have to offer?
Fixed wheel pulleys can be as small as a ring. A single ring pulley requires twice as much force as the weight being pulled. Adding more loops to the rope will reduce the effort required to pull the weight. The mechanical advantage of a fixed pulley is proportional to the number of strands running to the free pulley. A 100-pound pull on the free end will lift a 300-pound load.
pulley

composite pulley

Compound pulleys are pulleys that can be used to change the direction of a control wire. It can also be used to modify the mechanical force of the wire by moving the item it is connected to. In galleons, compound pulleys are more common. They are often combined with other ropes for mechanical advantage. Here are some common uses for composite pulleys.
The ideal mechanical advantage of a pulley is equal to the number of rope segments that pull up the load. This means that the more rope segments, the less force is required. A compound pulley will have the ideal mechanical advantage of 2, which means it will generate more force than a simple pulley. Composite pulleys are also more efficient at transmitting force because their number of rope segments is usually equal to the unit weight.
Composite pulley systems use more than 2 pulleys and ropes. More pulleys will reduce the force required to move heavier objects. They are usually used in large sailboats. The system is also used on construction sites. It can be used for a variety of applications, including lifting large objects or transmitting electricity. You can imagine how it would change your life if you had to move a large sailboat, but the result would be the same: a composite pulley system would make it easier to lift a large sailboat.
Composite pulleys are also known as fixed pulleys. The fixed pulley is stationary, and the movable pulley moves back and forth. The latter is more effective when used with a detachable cord or strap. On the other hand, a moving pulley is a moving pulley and it gives you a mechanical advantage. You can imagine this pulley on a flagpole.

load multiplier

The multiplication system has 3 basic parts: the rope grab, the connector, and the pulley. While some basic multipliers may combine the 3 parts, the concept remains the same. The multiplication system can make pulling the rope easier by reducing the amount of friction that occurs. Below are some examples of multiplication systems. A compact rope grab is a great option for resetting the multiplier.
The load reduction that a pulley system can achieve is proportional to the number of ropes used to support it. Although most utility pulley systems use only 4 ropes, the theoretical maximum load reduction is a quarter of the actual load. In other words, the four-wheel system only reduces the weight of a 1,000-pound load by a quarter. That would require 167 pounds of force, a far cry from the 500-pound load a single pulley system can achieve.
The mechanical advantage of a pulley system can be calculated by calculating the ratio between the forces exerted on each wire. For example, a 90-kilogram load is supported by 3 ropes, each weighing about 30-5 pounds. The ropes on pulleys A and B each carry a load of 60 kg. Using this formula, a single pulley system will yield a mechanical advantage over 2 tractors.
To calculate the force required to pull the rope over the pulley, measure the angle and deflection between the ropes. The deflection angle when added to the included angle should equal 180 degrees. A 75 degree angle requires 159% of the load force. This means a total load multiplier of four. This formula is an important tool for calculating the force multiple of the pulley.
pulley

Disadvantages of fixed pulleys

There are 2 basic types of pulleys: movable and fixed. Active pulleys are more advanced, allowing the pulley to move according to the load. They reduce the force required to lift the load. Active roller pulleys are more compact and therefore take up less space. Both types are good for lifting heavier objects, but they each have their pros and cons.
Fixed wheel pulleys can be used to lift heavy objects. This type of pulley consists of a wheel with a fixed shaft that has grooves on its edges for guiding ropes or cables. This is a simple machine as no motor or engine is required to lift objects. When 2 or more wheels are used together, the ropes around the wheels form a powerful hoist.
Single wheel pulleys are not suitable for lifting. They tend to push things down. Also, they are unreliable because they rely on friction and can slip. Also, a single wheel pulley would require a lot of space. Another disadvantage of fixed-wheel pulleys is that they make it difficult to move heavy objects easily. Single fixed-wheel pulleys also tend to slip easily, making them a poor choice for many applications.
Fixed wheel pulleys are also easier to install and maintain than manually operated ones. It requires less space and lubrication than manual pulleys. Manual pulleys can cause injury because the operator will be lifting the full weight of the heavy object. Additionally, rope slippage can lead to muscle strains and rope burns. And the system requires frequent maintenance.

China Custom China Foundry Ductile Grey Iron Sand Casting Flywheels and Pulley with Precision Machining     with Great qualityChina Custom China Foundry Ductile Grey Iron Sand Casting Flywheels and Pulley with Precision Machining     with Great quality

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