| Material |
1) Aluminum: AL 6061-T6, 6063, 7075-T etc. |
| 2) Stainless steel: 303, 304, 316L, 17-4(SUS630) etc. |
| 3) Steel: 4140, Q235, Q345B, 20#, 45# etc. |
| 4) Titanium: TA1, TA2/GR2, TA4/GR5, TC4, TC18 etc. |
| 5) Brass: C36000 (HPb62), C37700 (HPb59), C26800 (H68), C22000(H90) etc. |
| 6) Copper, Bronze, Magnesium alloy, Delrin, POM, Acrylic, PC, etc. |
| Surface Treatment |
Galvanized (zinc-plated, nickel-plated, chrome-plated, silver-plated),
powder coating/oil painting, polishing (mirror polishing,
electrolytic polishing),brushing, sand blasting, hot-dip galvanized. |
| Processing Craft |
Engineer drawings-CNC Machining-CNC Turning-Grinding-Inspection-Package |
| Tolerance |
+/-0.01mm or special requirements |
| Package |
PE Bag, Paper carton box, plywood case/pallet/crate |
| Application |
Auto parts, electronic products, power supply, industry cabinet, construction etc |
| Quality Control |
ISO9001/ROHS/SGS |
| Drawing File Format |
Solid works, Pro/E, Auto CAD, PDF |
| Features |
Customized Design
Sample Order Accepted
Short Delivery time
Competitive Prices
Long time quality Insurance
Professional after-sale services |
| Inspection |
1.Foundry in-house: 100% inspection on critical dimension; 100% on appearance.
2.Third Party inspection available upon requirement |
| Mainly Testing Facility |
Three-dimensional measuring instrument(CMM),Salt spray test box,Dynamic balance detector, Pneumatic detection |
| Application |
Medical,Semiconductor,War industry,Auto parts,Used widely |
| Delivery time |
15-20days |
| Quality Insurance |
One Year |
Welcome to the world of Zhengrong Precision Machining! Here, you will encounter a machinery processing factory with a glorious history spanning nearly 20 years. We are one of the oldest precision machinery processing factories in China, having witnessed the changes and development of the industry.
We specialize in the processing of precise, complex, specialized, and small parts, and have accumulated extensive experience in fields such as CNC machining, turning, milling, grinding, electrical discharge machining (EDM), and wire electrical discharge machining (WEDM), backed by our exceptional technical prowess. No matter the difficulty of the parts, we can craft flawless products for you with superb craftsmanship.
The products of Zhengrong Precision Machining are widely used in semiconductor testing equipment, medical devices, automation equipment, electronic devices, precision chemicals, aerospace, and various machinery fields. Our parts are an indispensable part of these high-precision equipment, contributing to scientific and technological progress and driving industry development.
We proudly inform you that Zhengrong Precision Machinery enjoys a high reputation both domestically and internationally. Over the years, we have established long-term and friendly cooperative relationships with numerous clients in Japan, the United States, Europe, and other countries, earning widespread trust and praise.
We sincerely invite you to delve deeper into the world of Zhengrong Precision Machining and explore the possibilities for collaboration together.
Detailed Photos
Our Advantages
1.Personalized Customization Service: Tailored to meet customers' technical requirements completely, from material selection to dimensional tolerances, creating exclusive products.
2.One-Stop Multi-Process Efficient Processing: From raw materials to finished products, we provide one-stop services including cutting, forming, grinding, etc., optimizing production processes to ensure dual enhancements in efficiency and quality.
3.Top-notch High-Precision Processing Skills: We focus on every detail, utilizing precision instruments to achieve micron-level processing accuracy, ensuring product quality.
4.Professional Customization of Irregular Parts: Proficient in handling irregular parts with complex shapes and special dimensions to meet your unique needs.
5.Welcome to Small Batch and Single-Piece Orders (Minimum Order Quantity = 1 Piece): With a minimum order quantity of only 1 piece, we understand and support every project need of yours, whether it's a single piece or small-batch production, we are happy to accept.
6.Cost Optimization Expertise: Leveraging our extensive experience and combining various processing technologies, we provide cost optimization solutions for your projects while maintaining exceptional quality.
7.Flexible Payment Terms: We offer flexible payment conditions, with a 50% deposit required upfront, and the balance paid after quality inspection satisfaction, allowing you to shop without worries.
8.Safe and Professional Packaging Solutions: We tailor professional packaging according to the characteristics of the parts to ensure their safety and reliability during transportation.
9.Stringent Quality Control System: Every step of the production process undergoes strict inspection by the quality control department, with all non-conforming parts being reworked to ensure you receive quality products.
10.Comprehensive Quality Documentation Support: We provide detailed documentation for your parts, including raw material certificates, heat treatment reports, and quality inspection reports, allowing you to have a clear understanding of product quality at a glance.
11.Rapid Delivery and Efficient Guarantee: Our internal production management is scientifically rigorous, with rapid response to urgent orders and delivery in the fastest 7 days, ensuring efficient progress of your project.
12.DDP Trade Term, Convenient Customs Clearance Service: Providing double customs clearance door-to-door service, eliminating cumbersome customs clearance processes, and delivering directly to you via express or air freight, making international trade simpler.
Production Process
CNC Machining
Our company is equipped with more than 15 high-speed, high-precision CNC machining equipment with a processing accuracy of up to ±0.005 millimeters. This equipment demonstrates robust processing capabilities for a variety of materials, including metals, plastics, and composites. Leveraging their expertise and extensive experience, our senior technicians fully utilize the advantages of these machines to manufacture components with complex shapes and strict tolerance requirements. Our technical superiority is particularly evident in the field of precision instrument manufacturing.
CNC machining technology plays a pivotal role in the production of core components such as optical instrument barrels, precision mechanical parts, and sensor housings. These components have extremely high requirements for dimensional accuracy, form accuracy, and surface quality. With the skilled operation of our senior technicians, our company's CNC machining equipment not only meets these stringent standards but also ensures the quality and precision of each product due to its excellent processing capabilities and efficient production efficiency. This perfectly aligns with the processing needs of precision instrument components.
Turning
Our company is equipped with multiple high-precision CNC lathes with a rotational speed of up to 6000 revolutions per minute and a processing accuracy of ±0.002 millimeters. We can also refine the roughness to a mirror-like finish of Ra0.4 according to customer requirements. Tool steel subjected to heat treatment demonstrates even better surface finish under our lathe turning process.
Turning technology is particularly suitable for mass producing rotationally symmetric precision components such as shafts, bearings, and gears. These components play a vital role in precision instruments, such as shafts and bearings in transmission systems and rotating parts in precision measurement instruments. Our CNC lathes, with their high-speed and efficient processing capabilities, can quickly produce these critical components while strictly adhering to tolerance requirements and surface quality standards
Our technicians, with their extensive experience and proficient skills, can fully utilize the high precision and high efficiency of the lathes to ensure that each product meets customer expectations and requirements. Whether in terms of processing accuracy, roughness, production efficiency, or quality stability, our CNC lathes and technical team demonstrate unparalleled advantages.
Surface Grinding
We are equipped with multiple advanced surface grinding machines capable of ensuring a high standard of dimensional accuracy of ±0.002 millimeters for parts, while achieving a mirror-like finish with a roughness of Ra0.4 according to customer requirements. Our technical team has accumulated rich experience in centerless grinding, surface grinding, internal and external cylindrical grinding, and excels in processing high-precision complex components including arcs, steps, and grooves.
For different material types, we flexibly select various types of grinding wheels such as brown alumina wheels, diamond wheels, and resin wheels, and precisely match the most suitable processing scheme based on the difference in grit size of the wheel bonding particles. In the field of precision instrument manufacturing, our grinding technology is widely used for processing complex-shaped components with extremely high requirements for surface roughness, form accuracy, and dimensional accuracy, such as precision mechanical components for optical instruments and high-precision parts for measurement instruments.
With our exceptional grinding process, we can ensure that the flatness, perpendicularity, parallelism, and other positional tolerances of these critical components meet extremely high standards, satisfying the stringent accuracy requirements for parts in precision instruments, and effectively supporting the manufacturing and upgrading of precision instruments.
Wire Electrical Discharge Machining (WEDM)
We are equipped with multiple high-precision Wire Electrical Discharge Machining (WEDM) devices. Our professional technicians, through precise wire cutting processes, can ensure a high standard of dimensional accuracy of ±0.01 millimeters for parts while effectively preventing deformation during the machining process. During the WEDM process, we exercise extreme precision in controlling the loss of cutting edges, profiles, internal holes, and eroded surfaces, thereby achieving high-precision maintenance of thickness dimensions.
It is particularly noteworthy that our WEDM technology demonstrates exceptional performance in processing high-strength, high-hardness materials such as hardened steel, as well as complex geometries that are difficult to tackle with traditional machining methods. In the field of precision instrument manufacturing, this technology is often used to machine components with micro-holes, precision slits, and complex curved surfaces. These components have extremely high requirements for dimensional accuracy, geometric shape accuracy, and surface quality.
We use fine molybdenum wire as the electrode. Leveraging the high precision and flexibility of WEDM technology, we can achieve precise cutting of these high-precision, high-complexity components. This technology not only meets the stringent accuracy requirements for parts in precision instrument manufacturing but also demonstrates our professional strength and technological advantages in the field of machinery manufacturing.
CNC machining, turning, milling, grinding, and WEDM each have their advantages in the processing of precision instrument components. Our company will reasonably select the appropriate machining method according to the requirements of the machining process to ensure the production of high-quality, high-precision precision instrument components for you.
ISO Certificate
Application Area
Product Categories
Company Profile
Qingdao Zhengrong Precision Machinery Co., Ltd. was established in 2007 and is located in Chengyang District, Qingdao City, Shandong Province, China. The company strictly follows the ISO9000 quality management system standard to ensure product excellence.
We specialize in processing parts made of various materials, including metallic materials, stainless steel, steel, aluminum, iron, alloys, plastics, and quartz glass. By integrating advanced processes such as heat treatment, quenching, centerless grinding, wire electrical discharge machining (WEDM), milling, surface grinding, computer numerical control (CNC) machining, and electrical discharge machining (EDM), we are proficient in manufacturing various highly challenging and structurally complex parts.
Our processing range is extensive, including but not limited to brackets, adapters, housings, flanges, timing pulleys, blocks, bushings, shafts and pins, gear shafts, rollers, spur gears, connectors, plates, tube fittings, bases, baffles, gaskets/washers, rings, insulating guide wheels, and guide posts.
These precision-processed parts are widely used in multiple fields such as semiconductor testing equipment, medical equipment, aerospace, hydrogen engines, automotive assembly lines, steel strip packaging machines, CCD sorting machines, ships, high-speed trains, cameras, and mobile phones.
Qingdao Zhengrong Precision Machinery Co., Ltd. is equipped with over 30 advanced processing machines, including lathes, milling machines, grinding machines, wire electrical discharge machining machines, and CNC machining centers. Additionally, we have a professional quality inspection department equipped with various precision inspection equipment to ensure that every product meets quality standards before leaving the factory.
As an enterprise specializing in the processing of precision, special, and small parts, we possess more than 18 years of rich experience. We sincerely invite friends from all walks of life to visit our company for guidance or engage in online exchanges.
Quality Assurance
FAQ
Q1: What kind of parts do you specialize in machining?
We excel at producing precise, small, special, and complex parts. Our expertise lies in creating intricate components that require tight tolerances and unique functionalities.
Q2: What processing technologies do you offer?
We possess a comprehensive suite of CNC machining capabilities, including 3-4 axis CNC machining, turning, milling, centerless grinding, surface grinding, cylindrical grinding, EDM (Electrical Discharge Machining), wire cutting, and laser cutting. This extensive range allows us to tackle a wide variety of projects with the most appropriate technique.
Q3: What tolerances can you guarantee?
We hold ourselves to the highest precision standards, guaranteeing tolerances down to +/- 0.001mm (1 micron or 1 micrometer). This ensures exceptional accuracy and functionality for your parts.
Q4: What is the typical lead time for production?
Our lead times are flexible and depend on the complexity of your project. Typically, we can complete production within 7-30 days.
Q5: Do you accept sample orders? And what is the sample lead time?
Absolutely! We understand the importance of sample verification before mass production. We offer sample orders with a quick turnaround time of approximately 7 days.
Q6: Do you provide inspection reports and material certificates?
Yes, we provide comprehensive documentation for your parts, including detailed inspection reports and material certificates. Additionally, we can offer heat treatment reports to ensure complete transparency and traceability.
Q7: How do you ensure quality?
We prioritize quality throughout the entire process. We have a dedicated in-house quality inspection department equipped with CMM (Coordinate Measuring Machine) testing capabilities. Furthermore, we support third-party testing to guarantee the highest quality standards for your project.
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