Renjie
Custom Online CNC Precision Machining Sevices China

Custom Online Cnc Precision Machining Services

Need precision parts? We provide online CNC machining services from China, combining cost efficiency with quick turnaround. As a CNC precision machining manufacturer for USA and global markets, we deliver high-quality parts that meet strict industry standards. Simply upload your CAD files to get an instant quote today!

◉ISO 9001 & ISO 13485 Medical certified

◉Earliest delivery time within 7 days

◉Tolerances up to ±0.01mm (±0.0004")

CNC Machining CNC Milling CNC Turning Rapid Prototyping Laser Cutting Sheet Metal Fabrication Plastic Injection Molding Surface Finishing

Advanced CNC Machining Service

In order to ensure the accuracy and quality of products, the company is equipped with five-axis link age machining centerturning and milling compound, drilling and tapping machine CNC machine tools,CNC lathes, qeneral turning, milling machine grinding machine,coordinate detector, quadratic element, height meter and other advanced processing equipment and testing equipment.

Why Use Renjie Precision Machinery CNC Machining Services?

CNC Machining advantage

ISO 9001 & ISO 13485 Certified

We provide ISO 9001 & ISO 13485 CNC precision machining services.Our products have obtained industry certifications at the medical level，which strictly ensures the high quality and high precision of the products.

CNC Machining advantage

Prototype and Low-Volume Customization

We provide you with flexible solutions to test your design and speed up product development, beginning with a rapid prototype, to small-batch custom parts.

CNC Machining advantage

Fast Response & Professional Support

Our experienced engineering team provides quick responses (within 8 hours), technical guidance, and dedicated service to keep your project on schedule.

CNC Machining advantage

Free Material & Quality Inspection Reports

Every order comes with complimentary inspection reports, giving you full transparency and confidence in the quality of your parts.

PROTOTYPES AND PARTSMADE EASY

Get 3-day standard lead times on simple parts between 10 mm x 10 mm and 200 mm x 200 mm. Upload your part to see if it’s eligible.

  • Upload CAD file

    Upload files-Fill in your information and upload your CAD file to obtain a quotation.

  • Receive Quotation

    Engineers evaluate the quotations and delivery schedules based on your drawings.

  • Production

    We will prepare the raw materials according to your order and start the production process.

  • Quality Inspection

    Quality inspection and packaging - The quality inspection department will inspect the condition of your finished products and carefully pack them.

  • Delivery

    Delivery on time.

CNC Machining Materials

Metal
Plastic
Aluminum
Stainless Steel
Brass
Copper
Titanium
Magnesium

Aluminum

Aluminum is the most widely used non-ferrous metal structural material in the industry. As a soft, lightweight and durable metal material, it is often used in aerospace. If you would like to know aluminum materials, please review our aluminum CNC Machining Services page.

CNC Machining Aluminum Alloys

Stainless Steel

Stainless steel has the characteristics of corrosion resistance, high temperature resistance and ultra-low temperature resistance.It has a wide range of applications and can be used to manufacture medical equipment, auto parts, industrial products, etc. RENJIE can provide a variety of stainless steels such as 201, 202, 303, 304, 316, 4130, 4140.

CNC Machining Stainless Steel Alloys

Brass

Brass is an alloy of copper and zinc. It has high strength and excellent machinability and wear resistance. The surface of brass will gradually oxidize and turn black in the air, but it will form an oxide film to protect the interior. It is often used in the manufacture of precision instruments, ship parts, auto parts, medical accessories, electrical accessories, industrial products and other precision copper parts.

CNC Machining Brass Alloys

Copper

Copper, also known as red copper, has good electrical and thermal conductivity, ductility and corrosion resistance, and good plastic deformation. It is a metal material commonly used in the production of generator sets, power switch devices, electrical appliances, shielding covers, chemical industry, etc.

CNC Machining Copper Alloys

Titanium

Titanium is a structural metal with light weight, high strength, good corrosion resistance and high heat resistance. Commonly used in automotive industry, aviation fasteners, turbine blades, engine parts, sports equipment, marine, environmental protection and other applications.

CNC Machining Titanium Alloys

Magnesium

Magnesium is the most widely used non-ferrous metal structural material in the industry. As a soft, lightweight and durable metal material, it is often used in aerospace, automobile, machinery manufacturing, shipbuilding and industrial development. The customized aluminum products processed by RENJIE have a wide range of appearance and color options and a complete range of surface treatments, which can meet the needs of different industries.

CNC Machining Magnesium Alloys
ABS
Nylon
PMMA
PC
PEEK
POM
PP
PTFE

ABS

ABS is a thermoplastic polymer structural material with high strength, good toughness and easy processing. It is also a low-cost engineering plastic with good processing performance, strong mechanical properties, and a wide range of applications, making it an excellent choice for production parts.

ABS for CNC Machining

Nylon

Nylon（PA）. Also known as polyamide
It is the most important engineering plastic, covering almost every application field, widely used in chemical machinery, anti-corrosion equipment gear and parts blanks, transmission structural parts, household appliance parts, auto parts, etc. Learn more about Nylon 6/6 for CNC machining.

Nylon for CNC Machining

PMMA

PMMA:（polymethyl methacrylate）Also known as acrylic
It has the characteristics of good transparency, chemical stability and weather resistance, easy dyeing, easy processing, good plasticity and beautiful appearance. It is widely used in medical, industry, automobile and other fields. However, its thin-walled areas are fragile during machining, so it is not recommended for delicate or complex geometries. Learn more about Acrylic CNC Machining.

PMMA for CNC Machining

PC

Polycarbonate, referred to as PC engineering plastics, an amorphous thermoplastic resin with excellent comprehensive properties, an engineering plastic with excellent electrical insulation, ductility, dimensional stability and chemical resistance, high strength and weather resistance. Learn more about Polycarbonate CNC machining

PC for CNC Machining

PEEK

PEEK (poly-ether-ether-ketones) is a high-performance specialty engineering plastic that is an excellent lightweight alternative to most soft metals. It has excellent mechanical properties, good self-lubrication, chemical resistance, and good wear resistance. Commonly used in aerospace, automobile manufacturing, electrical and electronic, medical, and other fields. Learn more about PEEK CNC machining.

PEEK for CNC Machining

POM

POM (polyformaldehyde) is an engineering plastic with high hardness, high rigidity and high wear resistance. It has good surface hardness and compactness, and is suitable for gears, bearings, auto parts, machine tools, instrument internals and other products that play a skeleton role. Learn more about POM CNC Machining.

POM for CNC Machining

PP

It is one of the lightest varieties of all plastics at present; it has the characteristics of high heat resistance, good mechanical properties, environmental protection and non-toxicity. It is suitable for making general mechanical parts, corrosion-resistant parts and insulating parts. Learn more about Polypropylene CNC Machining.

PP for CNC Machining

PTFE

Commonly known as "Plastic King", it has excellent properties such as high and low temperature resistance, chemical corrosion resistance, small friction coefficient, self-lubrication and non-stickiness. Widely used in aerospace, electronics, electrical, chemical, machinery and other industries. Learn more about PTFE CNC machining.

PTFE for CNC Machining

Gallery of Industrial Mechanical Parts

Communication equipment housing

Alloy Base Plate

Communication equipment housing

Alloy Machined Piece

Communication equipment housing

CNC Steel Component

Communication equipment housing

Copper Stamping Part

Communication equipment housing

Sheet metal spiral coil

Communication equipment housing

Titanium CNC Part

 
 
 

Surface Finishing

  • Anodizing

    RENJIE has its own oxidation plant and is a specialist in anodized aluminium, magnesium and titanium. Anodizing not only provides a beautiful appearance color, but also increases the hardness and durability of the workpiece, and in some cases, it’s a more ideal finish than painting.

  • Sandblasting

    Sandblasting sprays fine sand to the workpiece through high-pressure airflow, which can form a unique texture while removing burrs and stains on the surface of the workpiece. Sandblasting can be used as a final treatment, or be prepared for subsequent surface treatment to increase the bond strength between the workpiece and the coating/plating.

  • Painting

    RENJIE has specific painting equipment, which can spray the product from any direction. Thousands of colors can be prepared by experienced sprayers, and the surface effect can be selected from matte, semi-gloss and full-gloss finishes, ensuring that the spraying quality can satisfy customers’ requirements.

  • Powder Coating

    Use professional equipment to spray electrostatic powder on the surface of the workpiece to form a uniform coating with different effects. RENJIE always insists on protecting the ecological environment, and carries out environmentally friendly production on powder coating, so that the entire production process can reach a pollution-free state.

  • PVD

    PVD is an environmentally friendly process. The plated film has the characteristics of high hardness, wear resistance, corrosion resistance, high chemical stability and long life. It can be plated with various film colors and finishes, which greatly improves the appearance of the workpiece.

  • Electrophoresis

    This process can obtain a uniform and smooth paint film on the inner layer, depression, welding seam and other parts of each component, which solves the problem of painting complex-shaped workpieces by other painting methods, and the product has a long-lasting bright color and works well on corrosion resistance.

  • Electroplating

    Electroplating includes vacuum electroplating, UV electroplating, plastic electroplating, and metal electroplating; its technology is widely used, suitable for mass production, and is easier to mechanize and automate production.

  • Passivation

    Passivation has the characteristics of not increasing the thickness of the workpiece and changing the color, improving the precision of the product and the anti-corrosion ability of the metal, and also maintaining the characteristics of the metal surface and increasing its added value.

  • Laser Engraving

    The marked logo and pattern of RENJIE’s laser engraving have outstanding features such as exquisite, clear, beautiful, and permanent, and will not fade or wear due to touch, temperature, etc. Laser engraving can engrave complex patterns and images on metal and non-metal materials.

  • Silkscreen Printing

    RENJIE’s silkscreen printing can be freely adjusted with various inks and coatings, so that the silk printing pattern can achieve a colorful, bright and strong three-dimensional effect. And the printing method can be used in various materials and shapes.

Surface Finishing - Anodizing
Surface Finishing - Sandblasting
Surface Finishing - Painting
Surface Finishing - Powder Coating
Surface Finishing - PVD
Surface Finishing - Electrophoresis
Surface Finishing - Electroplating
Surface Finishing - Passivation
Surface Finishing - Laser Engraving
Surface Finishing - Silkscreen Printing

Start with a Free, No-Obligation Quote

ISO-certified precision machining with transparent pricing. Upload your drawings and receive expert manufacturing guidance within one business day.

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CNC Machining



CNC Machining FAQs

  • Q1: Can you machine medical-grade materials?

    A: Yes, our products have obtained the ISO 13485 certification for medical standards. The medical client cases we have worked with in the past include orthopedic implants, surgical forceps, medical equipment components, etc. We have ample experience in processing in the medical industry.

  • Q2: Will I receive inspection or quality reports for each order?

    A: Absolutely. Our quality department can provide free material inspection reports and full quality inspection reports for every order. Please let us know in advance if you require these documents so we can prepare them accordingly.

  • Q3: Is there a minimum order quantity for CNC machining?

    A: Renjie fully supports rapid prototyping and small-batch orders. Our minimum order quantity is 1 piece, making it easy to start with samples.Contact us at tinazhao@renjiecnc.com and Simply upload your CAD files to get an instant quote, our team will respond within 8 hours.

  • Q4: How do you calculate pricing for custom parts?

    A: Pricing is based on material, complexity, tolerance, and quantity. After you upload your CAD files, our engineers will review the design and provide a transparent, competitive quote tailored to your project.

  • Q5: Can you machine complex geometries or tight-tolerance parts?

    A: Yes.We operate 3–5 axis CNC machining centers and precision CNC lathes to meet the demands of highly complex components. Our experienced engineering team not only addresses challenges in part design and surface treatment but also resolves issues such as dimensional deviations that affect assembly and the programming of complex surfaces. This ensures the delivery of high-precision, reliable parts, even for the most intricate designs.

  • Q6：How does RENJIE ensure the quality of my parts?

    --Once your order is confirmed, we will perform a full Design for Manufacturing (DFM) review to point out any issues that our engineers feel may affect the quality of your parts.
    --All incoming materials are inspected and verified with a suite of testing equipment.
    --Final inspection reports before shipment.
    --We have the ability to share inspection data with you in real-time so we can work together to address any quality issues you may have during production.

  • Q7：How much does your CNC machining service cost?

    The average CNC machining cost per hour for a 3-axis CNC machine is around $40. The operator salary of CNC milling machines can range from $30 to $50 per hour. Therefore, the total cost of CNC services, in this case, would be around $80 per hour. Higher quality and more sophisticated CNC machines cost more.

  • Q8：Can CNC machining be used for both prototyping and production?

    A：Yes, CNC machining can be used for both prototyping and production purposes. CNC machining offers a cost-effective and efficient method for creating prototypes of parts and components. CNC machining is also commonly used for production runs of parts and components. Once the design and prototype have been finalized, CNC machines can be programmed to manufacture the desired quantity of parts with consistent precision and quality.

  • Q9：How do you select cnc machining manufacturer for my parts?

    A：Selecting the right manufacturer for your parts involves considering several factors to ensure they can meet your specific requirements and deliver the desired quality. As a world-leading cnc machining manufacturer of high-precision parts, we consistently stick to the core of precision manufacturing technology. Now, we have become a large-scale manufacturing enterprise that provides a complete set of services related to precision parts ranging from production to sales.

  • Q10：What is the difference between 3 axis and 5 axis machining?

    A：3-axis CNC and5-axis CNC differ in their ability to orient and move the cutting tool along multiple axes. 3-axis CNC machine is capable of moving its cutting tool along the X, Y, and Z axes. A 5-axis machine, on the other hand, can move the cutting tool along the X, Y, Z, A, and B axes.

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