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| Application: | Machinery Accessory |
| Standard: | GB |
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| 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,auto parts,Used widely |
| Delivery time | 15-20days |
| Quality Insurance | One Year |
CNC machined parts refer to components or parts that are produced using Computer Numerical Control (CNC) machining techniques. CNC machining is a manufacturing process that utilizes computerized controls and precise tools to remove material from a work piece and shape it into the desired form.
In CNC machining, a computer program controls the movement and operation of specialized machines known as CNC machines. These machines have the ability to accurately follow the programmed instructions to perform various machining operations such as cutting, drilling, milling, turning, and grinding.
CNC machined parts offer several advantages over conventional machining methods. The use of computer controls allows for high precision and repeatability, resulting in consistent and accurate parts. CNC machines can work with a wide range of materials, including metals, plastics, wood, and composites, making them versatile for different industries and applications.
The process starts with creating a digital model or design of the part using computer-aided design (CAD) software. The CAD file is then converted into a format compatible with CNC machines, such as a G-code program. The CNC machine reads the program and executes the necessary operations to transform the raw material into the final part.
CNC machining is widely used in industries such as automotive, aerospace, electronics, medical devices, and prototyping. It allows for the production of complex geometries, tight tolerances, and high-quality finishes. CNC machined parts are often used as components in larger assemblies or as standalone parts, depending on the application requirements.





1. Small Batch & Single Piece Orders Welcome (MOQ=1 piece): We understand that your project needs may vary, and we're happy to accommodate single-piece orders or small batch runs.
2. High precision: tolerence can be reached aournd +/-0.001 mm.
3. Fast Lead Times: Get your parts quickly! Our lead times start at fast as 7 days, ensuring you receive your order efficiently.
5. Flexible Payment Options: We offer flexible payment terms with a 50% upfront deposit and the remaining balance due after successful quality inspection and your satisfaction.
4. Extended Warranty with 24-Hour Support: We stand behind our work. Our extended warranty provides peace of mind, and our dedicated team will offer solutions within 24 hours should any issues arise during the warranty period.
6. Uncompromising Quality Control: Every step of the production process undergoes rigorous inspection by our quality control department. Any parts not meeting our high standards are returned for rework, guaranteeing you receive top-quality products.


| Feature | CNC Machining | Turning | Milling | Grinding | Wire EDM |
| Machining method | Computer numerical control | Computer numerical control | Computer numerical control | Abrasive | Electrical discharge machining |
| Machining principle | Material is removed by controlling the movement of the machine tool | The workpiece rotates, and the cutting tool moves along a straight line | The cutting tool rotates, and the workpiece is fixed | Material is removed by abrasive grinding wheel | Material is eroded by spark |
| Applicable materials | Metal, plastic, wood, composite materials, etc. | Metal | Metal, plastic, wood, composite materials, etc. | Conductive materials | Conductive materials |
| Machining accuracy | High | High | Medium | High | Low |
| Machining efficiency | Medium | High | Medium | Low | Low |
| Machining range | Plane, curved surface, irregular shape | Rotational body | Plane, curved surface, irregular shape | Complex shape | Complex shape |
| Machining cost | Medium | Low | Medium | High | High |
| Application scenarios | Batch production, complex parts processing | Batch production of rotary parts | Small and medium batch parts processing, complex shape parts processing | Processing of difficult-to-process materials, thin-walled parts | Processing of complex shapes of difficult-to-process materials |


Qingdao Zhengrong Precision Machinary Limited Company was established in February 2007, located in chengyang district, Qingdao city,Shandong Province,China.
The company has strict quality management in accordance with ISO9000.
We are good at processing parts of different materials, such as metal materials, stainless steel, steel, aluminum, iron, alloy, plastic, quartz glass,etc.
We are skilled in processing various difficult and complex parts, combining various processing techniques such as heat treatment, quenching, milling knurling,centerless grinding,wire cutting, milling, perforation, laser welding, grinding, cnc,wedm-ls,etc.
We are good at processing different parts, such as Bracket, Adapter, Shell, Flange, Timing Pulley, BLOCK,Bushing, Shaft Pin, Gear Shaft, Roller, Spur gear, Connector, Plate, Pipe Joint, Base, Baffle, Gasket/Shim, Rings, Insulated guide wheel, Guide pillar,etc.
The parts we process are widely used in semiconductor testing equipment, medical equipment, aerospace, hydrogen engines, automotive assembly lines, Steel Strip Packaging Machine, CCD Sorting Machine, boats, EMU, cameras, mobile phones, and more.
Our company has over 30 sets of processing equipments, including lathes, milling machines, grinders, wire cutting machines, CNC Machining Center, and other equipment. We also have a professional quality inspection department and various testing equipment to ensure that products are qualified before leaving the factory.
We specialize in precision, special, small parts processing and have more than 18 years of processing experience. We are warmly welcomed friends to visit our factory and online communication.


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.