China OEM ISO13485 and IATF16949 Shenzhen Electronics Manufacturing Service and PCBA+Box Building wholesaler

Product Description

Hongzhou Electronics,a member of Hongzhou Group,we have more than 15 years’ experience in PCBA contract manufacturing, professionally providing SMT, DIP, MI, AI, PCB assembling, conformal coating, final product assembling, testing, material procurement ,and 1 stop services such as wire harness, sheetmetal , plastic injection to make up complete product for customers. Our factory has a number of lines of SMT, assembly and testing, well-equipped with brand-newly imported CZPT and CZPT CZPT machine, full-automatic solder paste printing machine, 10 temperature zone reflow oven and wave-soldering oven. Our factory is also equipped with AOI, XRAY, SPI, ICT, full-automatic splitting machine, BGA rework station and conformal coating machine, with air conditioner and dust-free workshop and lead-free manufacturing process. We have passed ISO9001:2015 international quality management system, IATF16949:2016 automotive industry quality management system and ISO13485:2016 medical device quality management system.

Our PCBA and products are widely used in industrial control, medical device, food equipment, laser module, communication device, PLC module, transducer module, traffic control, automobile, smart home system, smart POS. We cooperate with worldwide clients and have long-term cooperated customers in USA, Canada, Germany,UK, Germany, Switzerland, Australia etc. which can be your reference.

Our advantages

Superior Quality

ISO9001 certified company, We have a very robust quality system and professional quality team;
Reliable Supply Chain,We have established long-term strategic cooperation with the top electronic components manufacturers all over the world, such as Xihu (West Lake) Dis.x, TI, Avnet, Future and etc;
High manufacturing capability, our PCB can reach a max layers of 64, minimum placement component size can meet 5711 and minimum placement spacing of BGA can meet 0.3mm;
We have complete inspection and testing for PCBA, including SPI,AOI,ICT,FCT,X-RAY,ROHS and aging.

Fast Turnaround

We offer fast and opened BOM quotation to customers;
10 years of cooperation experience with European and North American clients, quickly and professionally respond customer requirements.

Turnkey Service

We professionally offer the service of PCB Assembly (SMT, DIP, MI, AI), component procurement, product final assembly, testing, PCBA conformal coating, electronic product design and peripheral products support, etc;
Our factory is located in HangZhou, and besides we have warehouses in Hongkong, Europe and North America. We can prepare boards at the warehouse which is close to the customer and afford Kanban service according to customer requirements.

IP Protection
Strong believe in IP protection with proven records

Our SMT&DIP machines list:

No Machine name Machine Type Qty Manufacture Capacity Remarks
1 (GKG)
Auto. Printing machine
GKG-G5 3 GKG Cycle Time:<15s Plate size:420*520mm-737*737mm Size of printable board:50*50mm-400*310mm
Printing Accuracy:±0.571mm
Repeated Accuracy:±0.01mm
Placement machine
SM481 2 SAMSUNG Placement speed: 39000 CPH Corresponding element:5711-55mmIC(H 15mm) Placement accuracy:Chip±0.05mm,QFP±0.03mm Min Size of board:50mm(L)*40mm(W)
Max Size of board:740mm(L)*400mm(W)(Standard)
SM482 1 SAMSUNG Placement speed: 28000 CPH Corresponding element:5711-55mmIC(H 15mm) Placement accuracy:Chip±0.05mm,QFP±0.03mm Min Size of board:50mm(L)*40mm(W)
Max Size of board:740mm(L)*400mm(W)(Standard)
SM421 1 SAMSUNG Placement speed: 21000 CPH Corresponding element:5711-55mmIC(H 15mm) Placement accuracy:Chip±0.05mm,QFP±0.03mm Min Size of board:50mm(L)*40mm(W)
Max Size of board:740mm(L)*400mm(W)(Standard)
KE-3571AL 1 JUKI Placement speed: 17100 CPH Corresponding element:5711-50mmIC(H 20mm)
Placement accuracy:Chip±0.04mm,QFP±0.04mm Corresponding PCB Size:Min:40mm(L)*40mm(W) Max:650mm(L)*360mm(W)
KE-3571AL 1 JUKI Placement speed: 18500 CPH Corresponding element:5711-33mmIC(H 12mm)
Placement accuracy:Chip±0.04mm,QFP±0.04mm Corresponding PCB Size:Min:40mm(L)*40mm(W) Max:650mm(L)*360mm(W)
3 (JT)
Reflow oven machine
JTR-1000 1 JT 650-800mm/minute Number of zone:10 Zones
Temperature accuracy: +/-1ºC
AS-1000 1 JT 650-800mm/minute Number of zone:10 Zones
Temperature accuracy: +/-1ºC
NS-1000-N 1 JT 650-800mm/minute Number of zone:10 Zones
Temperature accuracy: +/-1ºC
IC cabinet
STF100S 1 HengKai 22 kinds of materials  
5 AOI (JT) JTA-300 1 JT 20000 Components/H Color image matching Resolution:Standard 20um/pixel,
Viewable range:44*33mm/32*24mm Speed:0.25 sec/FOV
ALD515 1 Aleader 20000 Components/H Color image matching Resolution:Standard 20um/pixel,
Viewable range:44*33mm/32*24mm Speed:0.25 sec/FOV
6 (JY)
IC bake machine
100 1 Jingyi Inside size L=600MM, W=500MM, H=1000MM Temperature range:0-250(ºC)
BGA Rework machine
LK-T6 1 LK Maximum hot air temperature: 400 °C High-precision temperature controller, temperature error of 1 ° Size:69CM*55CM*48CM
Welding success rate of up to 98%
Wave soldering machine
FM-350 1 SUNEAST Transmission speed: 500~1800mm/Min.
Board size: 50~350mm(W)*120mm(H)
Board height: 750±20mm
Preheating temperature: Max.200°C
Tin CZPT temperature: Max.300°C
9 X-Ray(Scienscope) View X1800 1 Scienscope Image speed (fps):30 Detection range (cm2):0.05-30 X-ray tube type:Transmissive closed tube Spatial resolution (um):5
Tube voltage (KV):90 (optional 100)
Tube current (uA):256 Magnification:500X
10 Conformal Coating machine (HangZhou) iCoat-3 1 HangZhou speed:Max 800mm/S Repeated positioning accuracy:±0.02mm

Below are some photoes of SMT&DIP machines and Inspection machines



Reflow machine-JTR1000 & AS-1000

What we need:

* Gerber files of the bare PCB
* Bill of materials to include: Manufacturer’s part number, type of part, type of packaging,
component locations listed by reference designators and quantity
* Dimensional specifications for non-standard components
* Assembly drawing, including any change notices
* Final test procedures (if available)

Our advantages :

1) Orders of small quantity,multi-species and high quality PCBA projects are also welcomed;
2) Speedy, Flexible and one-stop service in PCBA;
3) Assembly and Purchasing service offered, all components are promised to be purchased 100%
from Original factories or their pointed agents;
4) Transparent quotation,cost and benefit are detailedly opened to customer;
5) With professional Engineers and Long-term successful experience in cooperating with
customers inland and overseas, all new projects can be developed faster and better than expected;
6) With USA or Japan imported tin cream and tin bar, and 100% AOI testing during production,
all PCBAs we made are more reliable.

Our CZPT PCB PCBA manufacture:

1. No MOQ for Printed circuit board and CZPT DIP pcb assembling.
2. One-stop solution for various CZPT DIP PCB assembly.
3. Professional PCB Board engineer for one-to-1 service.
3. 100% PCBA AOI tested guarantee before shipping
4. RoHS, UL, ISO, SGS certificate approved
5. Factory production Capability of 30000 sqm/month
6. Turnkey EMS (electronics manfacturing service) including pcb manufacturing, compoments sourcing, pcb assembly, pcba conformal coating, box build, PCBA function testing.
7. Excellent Customer Service to Meet Your Special Needs
8. Shipment on time.

PCBs We Can Make:

1) We do PCB from double side up to 30-layer Multilayer PCB, HDI jobs.
2) If you have repeat orders from other suppliers, and you want to transfer to Intech, we can accept FREE OF TOOLING.
3) Except excellent quality and professional service, we also pay every detail for our customers, for example package to use Desiccant packs & moisture indicator in vacuum-sealed pack to protect PCB.
4) Material: We have FR4 TG135/TG158/TG180 normal material in stock, also have FR1/ FR2/ FR3/ CEM1/ CEM3/ ROGERS/ ARLON/ ISOLA.
5) Rigid / flex/ flex-rigid PCBs with UL approved.
6) Flexible,quickly feedback for customers always.
7) Quickly offer will be less then 4 hours, Some top urgent inquiry we can offer within 1hour.

Testing Procedures For PCB PCBA assembling:
We perform multiple quality assuring procedures before shipping out any PCB board. These include:
* Visual Inspection
* Flying probe, fixture tool
* Impedance control
* Solder-ability detection
* Digital metallographic microscope
* AOI (Automated Optical Inspection)

2. Support
Hongzhou aims to be the leading PCB manufacturer, and provide quality PCB products for electronic industry.

Layers 1-16 layers Min Board Thickness(2-layer) 0.2mm
Max Board Size 635 × 1100mm Min Board Thickness(4-layer) 0.6mm
Min Board Size 20 × 30mm Min Inner-layer Thickness 0.1mm
Min Trace 0.1mm Min Annular Ring 0.1mm
Min Space 0.1mm Min Hole Location Tolerance ±0.075mm
Min Hole Size 0.2mm Min Hole Size Tolerance ±0.05mm
Board Warp ≤ 1° Min Outer Dimension Tolerance ±0.1mm
Solder Mask Green, Yellow, Red, Black, Blue, White
Surface Finish HAL, HASL, Immersion Gold, Immersion Silver, Plating Gold, Plating Nickel, Plating Silver, Gold Finger, OSP
Board Material FR-4, High Tg FR-4, Halogen Free FR-4, Thick Copper FR-4, Aluminium Based, Rogers, Taconic
Acceptable file Gerber file(RS-274-X or RS-274-D with aperture list and drill files),Protel,PADS,POWERPCB,AutoCAD,ORCAD
CAM software Genesis, CAM350

3. PCB + Assembly
More and more of our existing PCB customers are now asking us for fully Assembled Printed Circuit Boards delivered to their door to take away all the time consuming stress of component procurement and assembly. In order to meet customers’ requirements, Hongzhou develops from a PCB manufacturer to a one-stop PCBA service provider, including PCB assembly, components sourcing, stencils, cable assembly and final product assembly and testing.

Available Services

PCB Manufacturing

PCB Assembly

Components Sourcing

SMT Stencils

Cable Assembly

PCBA Testing

Final Product Assembly

Assembly Technologces



Reflow Soldering

Wave Soldering

Hand Soldering


Mixed Assembly Technologies


PCB manufacturing Capacity

Items Capability
PCB Layers 1-28 layers
PCB material FR4, FR5, Aluminium,High Tg FR4, Halogen Free, Isola, Rogers
PCB Finished Board Thickness 0.2mm ~ 7.0mm(8mil-276mil)
PCB Copper Thickness 1/3oz ~ 7oz
PCB Max gold plating thickness 50 microinch
PCB Min. Trace Width/Space 0.075/0.075mm(3/3mil)
PCB Min. Finish Holes Size 0.1mm(4mil) for laser holes; 0.2mm(8mil) for mechanical holes
PCB Max.Finshed Size 600mm x 900mm (23.6″ x 35.43″
PCB Hole Tolerance PTH:±0.076mm(+/-3mil), NTPH:±0.05mm(+/-2mil)
PCB Soldermask Color Green, White, Black, Red, Yellow, Blue,ect
PCB Silkscreen Color White, Black, Yellow, Blue
PCB Impedance Control +/-10%
PCB Profiling Punching Routing, V-CUT, Chamfer
PCB Special Holes Blind/Buried holes, Countersunk holes
PCB Surface Finishing HASL, Lead Free HASL, Immersion tin, Immersion gold, Gold plating, Immersion silver, OSP, Carbon, etc.
PCB Certificate UL, ISO9001, ROHS, SG

pcb pcba Technical requirement:

1) Professional Surface-mounting and Through-hole soldering Technolog
2) Various sizes like 1206,0805,0603 components CZPT technology
3) ICT(In Circuit Test),FCT(Functional Circuit Test) technology.
4) CZPT OEM PCB Assembly With UL,CE,FCC,Rohs Approval
5) Nitrogen gas reflow soldering technology for SMT.
6) High Standard SMT& Solder Assembly Line
7) High density interconnected board placement technology capacity

SMT PCBA Capacity

Items Capacity
smt PCBA Min. IC Pitch 0.30mm(12mil)
smt PCBA Min. Chip Placement 5711
smt PCBA Max. PCB Size 410mm x 600mm(16.2″ x 23.6″)
smt PCBA Maximum BGA Size 74mm x 74mm(2.9″ x 2.9″)
smt PCBA BGA Ball Pitch 1mm ~ 3mm(4mil ~ 12mil)
smt PCBA BGA Ball Diameter 0.4mm ~ 1mm(16mil ~ 40mil)
smt PCBA QFP Lead Pitch 0.38mm ~ 2.54mm(15mil ~ 100mil)
smt PCBA Method SMT, DIP, AI,MI assembly
smt PCBA Certification ISO9001, ISO13485, IATF16949

Turnkey Electronics manufacturing Service

pcb service PCB circuit design, PCB Layout, pcb manufacturing, pcb copy
PCB components PCB components advicing, PCB compoments sourcing
PCBA OEM PCB prototype assembly, pcb with components,
Testing PCBA AOI test, PCB Assembly BGA X-RAY test, PCBA ICT test, PCBA FCT test
Conformal coating Conforal coating via coatingmachine , and UV oven
Box Build BOX build, box assembly
Turnkey service wire harness, sheet metal, plastic

* industrial control,
* medical device,
* food equipment,
* laser module,
* communication device,
* PLC module,
* transducer module,
* traffic control,
* automobile,
* smart home system,


Q1: What files do you use in PCB and assembly Quotation?
A1: Gerber, pcb. Auto CAD + Bill of Material

Q2: How do you make sure the quality?
A2: Our Product is all 100% tested including Flying Probe Test (for sample), E-test (mass) or AOI.

Q3: Can we visit your company?
A3: Of course! Welcome to visit our company, Hongzhou is located in Xihu (West Lake) Technology Building, HangZhou, Guandong province, china.

Q4: What is the lead time?
Q4: It takes 3-5 working days for sample, 7-10 working days for batch production based on files and quantity.

Q5: Will you keep our information and files secret?
A5: Sure! It is our basic principle to keep business secrets to protect our customers’ rights and behalf.

Q6. How to work with you?
A6: -Email and send us the PCB layout file, BOM list
– We will provide reply confirmation within 12 hours and reply to the offer within 3-5 days.
– Waiting for your company to confirm the price, order and payment method.
– We will start the production.



What is a roller chain?

What is a roller chain? A roller chain is a transmission system that transmits power from 1 shaft to another. Internal lubricant helps chains last longer and are interchangeable. Chains are usually made of carbon or alloy steel. Stainless steel is sometimes used in food processing machinery or in environments where lubrication is problematic. Brass and nylon are also sometimes used. If you need to slow down the machine, nylon chains can be used.

Roller chains are used to transmit power from 1 shaft to another

Generally speaking, the life of a roller chain is limited by 3 main factors: wear, corrosion, and fatigue. These can be minimized by following some simple guidelines. For optimum performance, the roller chain must be lubricated. Proper lubrication reduces friction and extends product life. Remember that corrosion and wind resistance can adversely affect lubrication, so protect the product properly.
A chain is a mechanical device used to transmit power from 1 shaft to another. The chain consists of a series of steel plates called bushings. Bushings are attached to the roller chain by pins or bushings. The block and bushing are held together by pins or bushings C riveted to the outer link D. The chain is also attached to the sprocket and bucket by pins or hooks. Chain pitch is measured between hinge centers, usually denoted p.
There are 3 types of chains: single-strand standard series, multi-strand standard series, and silent chain. Single strand chains are the most common type and cover a wide range of drive loads. Multi-strand chains provide greater power capacity without increasing chain pitch or line speed. An inverted tooth chain is a variant of a single-strand chain that eliminates the noise caused by pitch-related friction.
The inner and outer plates of the roller chain drive are made of steel. The rollers are positioned evenly between the chain links and are fastened to the sprockets. In addition, the rollers can rotate freely within the bushing. The chain links are arc-shaped and mesh with the sprocket teeth to transmit power through the chain.
Chain drives are another common way of transmitting mechanical power. These are the simplest forms of power transmission and are used on conveyor belts and other low-speed applications. The chain wraps around the sprocket and passes through the sprocket whose teeth mesh with the links. This mechanism transfers mechanical power from 1 shaft to another, increasing speed.

They are interchangeable

There are many different types of roller chains, but most are made of steel. Although they have their own advantages and features, they are generally interchangeable. You can buy different kinds of roller chains from domestic and foreign manufacturers, and you can choose the 1 that best suits your needs. Bearing Services can help you choose the right bearing for your application needs and budget. Here are some important things to consider before buying a roller chain. Here are some tips to make it easier for you to buy the right type of chain.
When choosing the right roller chain, be sure to consult the available size charts. Depends on how much chain you need to move the load you need to move. Remember that roller chains can be manufactured to fit a variety of machines and must meet your specific needs. Also, the chain should be long enough for the machine you are using. Make sure to buy a chain made of high-quality materials.
Double pitch roller chains have a flat top surface and are used in many different conveying applications. Double-pitch load-carrying roller chains, also known as oversized roller double-pitch chains, have rollers that extend beyond the sidebars to carry products. Double pitch drive series roller chains are used in elevators, long conveyor drives, agricultural machinery, and commercial sprinkler systems.
The tensile strength of a roller chain is a key factor to consider before purchasing a chain. The tensile strength of a chain is a function of the maximum force the chain can withstand before breaking. The 3 different types of tensile strength represent the force a chain can withstand without breaking. Each chain also has different strengths that can determine the type of chain you need.
The outer and inner links of the roller chain are designed for bearings. This allows the chain to be paired or unpaired with its internal links. The outer link has a pin, and the inner and outer pins are press-fit into the connecting plate. These links are usually made of steel and have a tensile strength of about 20 times their weight. The fatigue strength of two-pitch offset links is the same as that of the base chain.

They reduce wear with internal lubricants

In a roller chain, the pins and bushings rotate inside the chain without lubricant on the outside. They are in contact with the teeth of the sprocket and can easily wear out if not lubricated. The plates that connect the links and pivot about the pins can also rub against each other and cause wear. This is where lubricants come in handy. Without lubricant, the bare metal of the plate and bushing would rub against each other.
The lubricant should have the appropriate viscosity to penetrate critical internal surfaces and form an effective oil film. Recommended viscosities are listed in Table 1. Lubricants must be clean and non-corrosive. For roller chains, a good quality non-clean petroleum base oil is sufficient. While defoamers are not required, other additives such as antioxidants and extreme pressure inhibitors may be useful. However, impure oils should be avoided due to the risk of damage.
The shape of the spray head 10 overlaps with a conventional drive chain 12. The drive chain includes a plurality of rollers 24 and roller link plates 26. Each roller includes a roller pin 29 and is connected to a pair of pin link plates 28. Most drive chains have critical wear points on the sides of the roller pins 29. The shape of the spray head 10 prevents overspray onto the central portion of the roller.
In addition to preventing wear, these chains have unique specifications. Manufacturer CZPT requires raw material suppliers to certify that their products meet standards set by the American Society of Mechanical Engineers (ASME). CZPTs do not accept uncertified raw materials. For safety, the machine must be turned off before attempting to measure the chain. After the system is shut down, the measurement process should be completed in accordance with safety procedures.
General spray oil has lubricating properties, but is not as good as other types of chain lubricants. These are typically used for rust protection and include antioxidant chemicals. Generally, they are inexpensive and widely available in retail stores. However, they have the disadvantage of being very penetrating and difficult to apply evenly. Oil cannot stay on the chain as it spins, which can accelerate wear and corrosion.

They can be used to speed up or slow down machines

Typically, roller chains are chains used to move mechanical system components. Unlike belts, roller chains can be used to speed up or slow down a machine. The main difference between belts and roller chains is the lubrication process. Belts use lubrication to help them move at a constant speed, but should not exceed the critical speed of the roller chain. This critical speed is not easy to determine and lubrication is critical to its life.
A roller chain is a chain consisting of a steel bushing that holds the inner plate A and pins C together. Pin C is riveted to outer link D, while roller R surrounds each bushing B. The teeth of the sprocket are supported on the rollers. They spin freely on pins and bushings, reducing friction.
The chains can be single-stranded, double-stranded, or multi-stranded. The rated power capacity of the single strand chain can meet various drive load requirements. Multi-strand chains provide higher power capacity without increasing chain pitch or line speed. The silent chain, also known as the inverted tooth chain, consists of a series of toothed chainplates. The pins of the chain are pressed into the wide ends of the sidebars and outer links.
Although roller chains are a common mechanical component, they can fail under certain conditions. The most common cause of excessive wear is wrong to load sizing. Each manufacturer sets a maximum workload for its product. A chain that is too small for the load carried will not run smoothly and may cause premature failure. Chains can also fail due to rust or improper maintenance.
There are many ways to choose the correct size roller chain. The easiest way to choose the right 1 is to use a horsepower chart to determine the speed of the motor. RPM will determine the size of the chain and the number of teeth on the drive sprocket. Conveyor chains offer a variety of options to move products horizontally or vertically, even around bend radii.

China OEM ISO13485 and IATF16949 Shenzhen Electronics Manufacturing Service and PCBA+Box Building     wholesaler China OEM ISO13485 and IATF16949 Shenzhen Electronics Manufacturing Service and PCBA+Box Building     wholesaler