China Hot selling Multi Layer PCB Making DIY Printed Circuit Board Assembly wholesaler

Product Description


About us

Electronic Manufacturing Services
Xihu (West Lake) Electronics is specializes in providing customers PCB Assembly Services with utmost speed, flexibility and quality. We are establish in 2003, Located in HangZhou, China. 17 years of PCB assembly experience bring us a great wealth of production experience to ensure us catch the production requirements of various electronic products.

If you are looking for prototype or production of PCB assembly serice, welcome to contact with us to learn more !

Our Services

SMT Assembly Though-hole (DIP), FPC, Rigid-Flex
Full CZPT line for single or double sided assemblies. Wave solder, hand solder , selective solder. We can assemble both FPC and Rigid-Flex board.
Component placement down to 5711 package.    
BGA placement down to 0.5mm.    
Prototype & Production Full Turnkey Manufacturing Consigned
From DVT Prototype to volume production, we provide PCBA complete solution including making PCB, Provide us the some or all the materials and we will
our manufacturing suggestion help you to proceeding purchasing components,assembly, opening mold. take care of the assembly processes.
the production smoothly and acheive “Time to Market.”    
DFM,DFA Service Functional Testing Reliability testing equipment
Provide comments on design related issues to ensure a Make testing jig/mold, testing PCBA with the provided Vibration test machine, Hi-Low temperature chamber
smooth transition from design to mass production. test documention and equipment from Customers. machine, drop test machine.

Service parameters

We Offer PCBA complete solution starting from making PCB, purchasing all the component, PCB assembly, testing untill final packaging, and also includes opening mold.

Assembly Capability

PCB Max Size: 400*310mm
PCB Min Size: 10*10mm
PCB Thickness: 0.4~6mm
PCB / FPC Offer 2~16 layers on PCB, 1~6 layers on FPC
Components Size: 5711~150mm
Min Lead Pitch: 0.3mm
Min BGA Ball Pitch: 0.4mm
Placement Precision: +/-0.03mm
Lines: 4 x CZPT Productoin Lines
  2 x DIP Production Lines
  4 x Assembly lines
Leading time: 3 days after received all materials

SMT, Wave solder & Mixed Assembly Capbilities
Single & 2-side PCB Assembly Capilities
Rework ( Problem analyis , Hot Air & BGA Replacment) Capabilties
Class II & Class III Inspection process
AOI, Visual & X-ray Inspection process
Turnkey or Consigned or Combine Assembly services
PCBA Testing process
Functional testing / Voltage measument / Components check
Flexible adaptability to meet customer’s vary requirement on production & shipment.

Components Sourcing
Experienced purchasing team and strong local sourcing ability.
* Ability to source special component or accessories.
* Ability to identify the authenticity of component.
* Reasonable price.
* Shorter purchasing lead time for common used components.

Our Supply chain includes:


Q1: What files and documents need to provide for quotation ?
PCB: Gerber files RS274X format and PCB specification.
PCBA: Gerber files and BOM are the basic files need for make a quotation, and if possible pls also provide assembly drawing or photo of PCBA.

Q2: Is there any MOQ?
No, there no qty limited on our side. All up to you.

Q3: What is the expected quotation time for an RFQ?
For PCB, normally within 3 days.
For PCBA, normally 5~7 days, it depend on your design & components be required.

Q4: How about the privacy policy?
Normally we will sign a Non Disclosure Agreement with customers and we promise we will never share customer’s documents with any third parties.


drive chain type

Drive chains are used in a variety of industrial applications. Unlike roller chains, which are more efficient in terms of weight and size, drive chains slide on steel guides. Drive chains are often used for dirty work. Here’s what you need to know about the various types of drive chains. In this article, we’ll look at pin chains, engineered steel chains, bushing roller chains, and timing chains. These types are the most common and the most commonly used.

time chain

There are several factors to consider when deciding which drive chain to buy. What matters is how long the chain will last, as the timing chain will stretch over time. However, they are pre-stretched during manufacture to reduce the risk of stretching. Timing chains can also be noisy compared to toothed belt drives, but rails and chain tensioners can alleviate this problem. Timing chains also wear slower than belts, reducing repair costs.
Timing chains require little maintenance compared to belt drives. When well lubricated, timing chains require little maintenance. The only maintenance really required is checking the engine oil level and following the manufacturer’s recommended service intervals. Timing chains of drive chains are also safer than belt drives and can be dangerous if the toothed belt tears. Also, the timing chain only needs minor repairs and replacements. Garages can purchase complete timing chain kits that contain all the parts needed for repairs.
Drive chains can be equipped with roller chains or timing chains, depending on the load on the engine. The style of the timing chain depends on the type of motor used. However, the roller chain is the most common choice due to its high strength and NVH properties. The roller chain has 2 tabs pressed into the eyes, and 2 rollers above them. These components work together to improve engine performance.
Many modern vehicles use timing chains. Timing gears synchronize the camshaft and crankshaft so that the valves open and close at the appropriate times. This is critical to the running quality, power output, and fuel consumption of the engine. The timing chain also reduces the amount of pollution emitted by the vehicle. Over the past 2 decades, many OEMs have turned to time chains for OHC/DOHC engines.

pin chain

Steel pivot chains feature open barrels to reduce blocking and material buildup. These chains are designed for power transmission and transportation applications, often used in agricultural applications. They can be custom welded using specialized accessories. These chains can be used in agricultural, industrial and municipal applications. Here’s a closer look at each. Read on to learn about the benefits of steel pivot chains.
The Long Pitch Class 700 Pivot Chain is a versatile chain for conveying and lifting products. Its T-head pins fit snugly so dust doesn’t get into the pin holes. It is also constructed with a closed bearing structure to prevent elongation due to wear. Steel pivot chains are designed for high fatigue applications and are versatile.

Engineering Steel Chain

Engineered steel drive chain provides maximum power transfer while minimizing weight. Engineering chains are often used for tough oil drilling operations. Designed for durability and tight tolerances, these chains can be used in a variety of industrial equipment. Whether you need to lift heavy objects or store a lot of items, engineered steel chains will do the job. Read on to learn more about the benefits of engineering chains.
Engineered steel chains consist of links or pin joints with large gaps between the components. The material of these chains is designed to handle abrasives. While many of these chains are used as conveyors, some are designed for drives. You can find these chains on conveyors, forklifts, bucket elevators, oil rigs and more. To get the most out of them, they should be able to withstand the power produced by the prime mover.
The chain can withstand high tensile stresses and is ductile enough to withstand fatigue. The center-to-center distance between the chain and sprockets is between 30% and 50% of the pitch. On smaller sprockets, the arc of contact between the teeth and chain must be at least 120 degrees. The resistance of the chain drive depends on the use environment, including vibration, noise, fatigue strength and other factors.
There are many types of engineering steel drive chains, each with a different function. The most commonly used type is the elevator. Its lift mechanism raises and lowers the carriage. Most cranes are attached to the load with hooks. Another type of chain is the oval link. Its links are welded and the sprocket has receivers for each link. It is used in low speed applications for elevators, chain hoists and anchors in offshore operations.

Bushing Roller Chain

Typically, a bushing roller chain as a drive chain consists of 2 link assemblies. The inner link consists of 2 plates held together by 2 sleeves, while the outer link consists of 2 plates connected by pins that pass through the inner link. However, there are some differences between bushing roller chains. The main difference is the type of link and the amount of lubrication required. If you want to learn more about bushing roller chains, keep reading.
While roller chains are generally stronger and more durable than bushing chains, they are not immune to wear. During the driving cycle, they lengthen and undergo a process called articulation. The rate at which they elongate depends on the lubrication and load applied to them. The frequency of pin and bushing articulation is also critical. Like other wear parts, the manufacture of critical wear parts requires close attention to detail to ensure optimum performance. Correct raw material selection, part fabrication, and assembly are key factors in achieving optimum performance. Improperly prepared parts can affect wear life and performance.
Consider your application and load distribution when selecting a bushing roller chain as your drive chain. The length of the chain must be between 30 and 50 times its pitch. The arc of contact between the small sprocket teeth must be at least 120 degrees. The resistance of the drive chain depends on the usage environment, which will determine its fatigue strength and vibration level. It’s a good idea to check the chain length before deciding to replace it.

flat top chain

The TSplus flat top drive chain is the most flexible conveying medium on the market today. They can be connected end-to-end to create extended conveyor lines. The side bend design allows it to be used with a variety of conveyor types including inline, snake, and carousel conveyors. These chains are available in a variety of sizes, ranging in width from 3 feet to 20 feet.
A variety of materials are available for flat-top chains, including steel and plastic. Steel chains are ideal for applications requiring wear resistance. They are sturdy and well made. Plastic chains are particularly durable, but not suitable for harsh environments. Stainless steel flat top chains are suitable for a variety of applications, and some manufacturers make them from stainless steel or even aluminum. If your application requires a durable flat top chain, choose a chain made from iwis hardened stainless steel.
Another type of flat-top drive chain is the side bend chain. Suitable for flexible machinery requiring efficient conveying. It is equipped with a single hinge pin or double hinge pin. Either option will do, but each hinge pin has its advantages. Single hinge pin chains are suitable for smaller light-duty conveyors, while double hinge pins are more suitable for medium and heavy-duty applications.
CZPT is a modular flat top chain conveyor system. Its standardized components and modules can be easily integrated into any production process. And because it’s a single track, you can lengthen or shorten it as needed. Its versatile design makes it compatible with other conveyor systems such as belts and sprockets. This monorail modular design allows system lengths up to 40 meters and is compatible with other conveyor systems.

China Hot selling Multi Layer PCB Making DIY Printed Circuit Board Assembly     wholesaler China Hot selling Multi Layer PCB Making DIY Printed Circuit Board Assembly     wholesaler