CNC Milling Services

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Experience Precision CNC Milling Services from China

Richconn offers high-precision CNC milling services, producing custom parts with complex geometries from a variety of materials. We ensure exceptional accuracy and fast turnaround times, catering to prototypes, small batches, and large production runs.

3-Axis CNC Milling Services

Ideal for simple, flat parts and basic geometries.
Efficient for straightforward tasks with high precision.

4-Axis CNC Milling Services

Allows for additional rotation around the X-axis.
Suitable for more complex parts requiring precise positioning.

5-Axis CNC Milling Services

Enables simultaneous movement across five different axes. Perfect for highly intricate and complex parts with detailed features.
Capable of producing parts with undercuts, deep cavities, and intricate shapes.

CNC Milling Tolerances

We follow ISO 2768 standards for CNC machining.

Limits for nominal size	Plastics (ISO 2768- m)	Metals (ISO 2768- f)
0.5mm~3mm	±0.1mm	±0.05mm
> 3mm~6mm	±0.1mm	±0.05mm
> 6mm~30mm	±0.2mm	±0.1mm
> 30mm~120mm	±0.3mm	±0.15mm
> 120mm~400mm	±0.5mm	±0.2mm
> 400mm~1000mm	±0.8mm	±0.3mm
> 1000mm~3000mm	±1.2mm	±0.5mm
> 2000mm~4000mm	±2mm	–

Our CNC Milling Capabilities

Our state-of-the-art CNC milling services encompass advanced 3-axis, 4-axis, and 5-axis machining capabilities, ensuring we can handle a wide variety of materials and complex geometries with utmost accuracy.

3-axis CNC milling

Parameter	Metals	Plastics
Max. Part Size (L x W x H)	23001000650 mm	23001000650 mm
	90.539.525.6 in	90.539.525.6 in
Min. Feature Size	Ø 0.50 mm	Ø 0.50 mm
	Ø 0.019 in	Ø 0.019 in
Typical Tolerances	±0.01 mm	±0.01 mm
	±0.0004 in	±0.0004 in
Surface Finish	Ra 0.8 µm	Ra 1.2 µm
	Ra 32 µin	Ra 47.5 µin
Max. Cutting Feed Rate	20,000 mm/min	20,000 mm/min
	785 in/min	785 in/min
Spindle Speed	Up to 20000 RPM	Up to 20000 RPM
Tool Change Time	3.3 S	2.2 S

4-axis CNC milling

Parameter	Metals	Plastics
Max. Part Size (L x W x H)	21001800500 mm	21001800500 mm
	82.670.819.7 in	82.670.819.7 in
Min. Feature Size	Ø 0.2 mm	Ø 0.2 mm
	Ø 0.008 in	Ø 0.008 in
Typical Tolerances	±0.01 mm	±0.03 mm
	±0.0004 in	±0.0012 in
Surface Finish	Ra 0.8 µm	Ra 1.2 µm
	Ra 32 µin	Ra 47.5 µin
Max. Cutting Feed Rate	30,000 mm/min	54,000 mm/min
	1180 in/min	2126 in/min
Spindle Speed	Up to 20000 RPM	Up to 20000 RPM
Tool Change Time	3.3 S	2.2 S

5-axis CNC milling

Parameter	Metals	Plastics
Max. Part Size (L x W x H)	13851200900 mm	13851200900 mm
	54.5347.2435.43 in	54.5347.2435.43 in
Min. Feature Size	Ø 0.1 mm	Ø 0.1 mm
	Ø 0.04 in	Ø 0.04 in
Typical Tolerances	±0.01 mm	±0.03 mm
	±0.0004 in	±0.0012 in
Surface Finish	Ra 0.8 µm	Ra 1.2 µm
	Ra 32 µin	Ra 47.5 µin
Max. Cutting Feed Rate	50,000 mm/min	50,000 mm/min
	1968 in/min	1968 in/min
Spindle Speed	Up to 20000 RPM	Up to 20000 RPM
Tool Change Time	0.9 S	0.9 S

Material Selection for CNC Milling

We offer a wide range of materials for custom CNC milled parts, some of which are described below:

Metal materials

Properties: Lightweight, high strength-to-weight ratio, excellent corrosion resistance, good thermal and electrical conductivity.
Applications: Aerospace components, automotive parts, medical devices, consumer electronics, and prototypes.
Grades: 6061, 7075, 2024, 5083.

Plastic materials

Properties: Good impact resistance, toughness, and machinability; excellent dimensional stability and easy to bond with adhesives.
Applications: Prototypes, automotive components, consumer electronics housings, and enclosures.

If you don't find the material you are looking for, please contact us with your specific needs.

CNC Milling Parts Gallery

Browse through our gallery to see the exceptional quality and variety of our CNC milled parts, crafted to perfection for each industry.

CNC Milling Parts Surface Finishes

We offer a wide range of surface finishes for CNC milled parts to meet your specific aesthetic and functional needs.

Our CNC Milling Machines

At the heart of our manufacturing capabilities are our state-of-the-art CNC milling machines. Each machine is meticulously maintained and operated by our skilled technicians, ensuring every project meets the highest standards of excellence.

Why Choose Our CNC Milling Services?

Precision, Efficiency, and Innovation for Your Manufacturing Needs

Precision and Accuracy

We deliver tolerances as tight as ±0.001 inches, ensuring your parts fit perfectly every time.

Consistency

Whether you need 10 parts or 10,000, our CNC machines produce identical, high-quality parts consistently.

Speed and Efficiency

Our advanced technology speeds up production, helping you meet tight deadlines without sacrificing quality.

Complex Geometries

We handle intricate designs easily, bringing your challenging ideas to life without compromise.

Material Versatility

We work with a wide range of materials, including metals, plastics, and composites, meeting diverse project needs.

Support and Expertise

Our experienced team is here to guide you from design to delivery, ensuring your project’s success.

Frequently Asked Questions about CNC Milling Services

Find Answers to Questions About Our CNC Milling Services Quickly and Easily

What is the difference between CNC milling and CNC turning?

CNC milling involves removing material from a stationary workpiece using rotating cutting tools, while CNC turning rotates the workpiece against stationary cutting tools. Milling is typically used for more complex, non-cylindrical shapes, while turning is used for cylindrical parts.

Is there a minimum order quantity for CNC milling services?

We cater to both small and large orders, with no strict minimum order quantity. Whether you need a single prototype or a large production run, we can accommodate your needs.

Can you help with design optimization for manufacturability?

Absolutely. Our experienced engineers can review your design and provide recommendations to optimize it for CNC milling, improving manufacturability, reducing costs, and ensuring the best possible outcome.

How do you handle intellectual property and confidentiality?

We take intellectual property and confidentiality very seriously. We have strict protocols in place to protect your designs and data, including non-disclosure agreements (NDAs) and secure data handling practices.

What are the payment terms for CNC milling services?

Payment terms vary based on the project scope and customer relationship. We typically require a deposit before starting production, with the balance due upon completion. We accept various payment methods and can discuss flexible terms for larger or ongoing projects.

Can you provide samples before full production?

Yes, we can produce samples or prototypes for evaluation before moving to full production. This allows you to assess the quality and fit of the parts and make any necessary adjustments.

How do I submit my design for CNC milling?

You can submit your design files in various formats, including CAD files (e.g., .dwg, .dxf, .step, .iges). If you need assistance with file preparation, our engineering team is available to help ensure your design is optimized for CNC milling.

Ready to Get Started on Your CNC Milling Quote?

Contact us now to discuss your custom CNC milling needs and receive a competitive quote tailored to your specifications. Experience precision, quality, and fast turnaround with Richconn.

A Comprehensive Guide to CNC Milling

Whether you’re new to the CNC industry or seeking a reliable CNC milling service, this guide offers a quick and comprehensive understanding of the entire CNC milling process. Use it to navigate the CNC machining industry with ease, avoiding common pitfalls and making informed decisions every step of the way. Discover essential knowledge, practical insights, and expert tips to help you achieve success with minimal detours.

What is CNC Milling?

CNC milling is a sophisticated subtractive manufacturing process that employs computer numerical control (CNC) technology to precisely remove material from a workpiece using rotating multipoint cutting tools. This method is highly versatile, capable of producing complex shapes and intricate features with exceptional accuracy.

What are the Benefits of CNC Milling?

These benefits make CNC milling an essential and highly efficient manufacturing process, suitable for a wide range of industries and applications.

High Precision and Accuracy

CNC milling machines offer exceptional precision, allowing for the creation of intricate and detailed parts with tight tolerances.

Consistency and Repeatability

CNC milling ensures consistent production quality, as the computer-controlled process eliminates variations.

Complex Geometries

Capable of creating complex shapes and features that would be difficult or impossible to achieve with manual machining.

Efficiency and Speed

CNC milling processes are highly efficient, with the ability to operate continuously and at high speeds.

Reduced Waste

High precision and optimized cutting paths minimize material waste, making CNC milling more sustainable.

Ease of Prototyping

Quick and accurate production of prototypes allows for rapid testing and iteration of designs.

The Process of CNC Milling

This step-by-step process ensures that CNC milling produces high-quality, precise parts that meet exact specifications and requirements.

1. Design and Programming

CAD Design: The process begins with creating a digital 3D model of the part using Computer-Aided Design (CAD) software.
CAM Programming: The CAD model is then imported into Computer-Aided Manufacturing (CAM) software, which generates the toolpaths and G-code. The G-code is a set of instructions that tells the CNC machine how to move and what actions to perform.

2. Setup

Material Selection: The appropriate material for the part is selected and prepared.
Machine Preparation: The CNC milling machine is set up, including the installation of the necessary tools (cutting tools, end mills, drill bits) and fixtures to hold the workpiece.
Workpiece Loading: The raw material or workpiece is securely clamped onto the machine bed or fixture to prevent movement during machining.

3. Milling Operations

Toolpath Execution: The CNC machine reads the G-code and begins executing the programmed toolpaths. The cutting tool rotates and moves along multiple axes to remove material from the workpiece.
Roughing: Initial cuts are made to remove the bulk of the material quickly, bringing the workpiece close to its final shape.
Finishing: Precision cuts are made to achieve the final dimensions and surface finish, following the exact specifications of the CAD model.

4. Monitoring and Adjustment

Real-Time Monitoring: The machining process is continuously monitored to ensure accuracy. Operators may make adjustments to tool speeds, feeds, and depths as needed to optimize performance and quality.
Tool Changes: Automatic tool changers (ATCs) may be used to switch between different cutting tools during the process, depending on the complexity of the part.

5. Post-Processing

Deburring and Cleaning: After machining, the part may undergo deburring to remove any sharp edges or burrs. Cleaning is done to remove any remaining coolant or chips.
Inspection and Quality Control: The finished part is inspected to ensure it meets the specified dimensions and tolerances. This may involve visual inspection, dimensional measurements, and more advanced techniques such as coordinate measuring machine (CMM) inspection.

6. Finishing (Optional)

Surface Finishes: Depending on the application, additional surface finishing processes such as anodizing, plating, painting, or polishing may be applied to enhance the part’s appearance and performance.

7. Delivery

Packaging: The finished and inspected parts are carefully packaged to prevent damage during transportation.
Shipping: The parts are shipped to the customer, ready for use in their intended application.

What Types of Operations are Available for CNC Milling?

CNC milling is a versatile manufacturing process that involves removing material from a workpiece using rotating cutting tools. The types of operations available for CNC milling include:

Face Milling

This operation involves cutting a flat surface perpendicular to the axis of the cutter. It's used to create a smooth, flat face on the top of the workpiece.

Plain Milling (Slab Milling)

This operation cuts a flat surface parallel to the axis of the cutter, used for machining horizontal surfaces.

End Milling

This involves using an end mill to cut slots, pockets, or contours into the workpiece. It can be used for both peripheral and face milling.

Profile Milling

This is used to cut the outline of a part. The cutter follows a contour on the surface of the workpiece.

Slot Milling

This operation is used to create a slot or channel in the workpiece. It involves cutting along the length of the slot.

Drilling

Although primarily a different process, drilling can be performed on CNC milling machines using specific drill bits to create holes in the workpiece.

Boring

This is the process of enlarging a hole that has already been drilled or cast, using a single-point cutting tool or a boring head.

Tapping

This operation involves cutting internal threads in a hole, typically using a tap.

Contour Milling

Similar to profile milling, but involves more complex, curved surfaces, often in multiple planes.Similar to profile milling, but involves more complex, curved surfaces, often in multiple planes.

Chamfer Milling

This is used to create beveled edges on the workpiece, typically for deburring or aesthetics.

Pocket Milling

This involves cutting out a cavity or pocket in the workpiece, often used in the creation of molds or dies.

Ramping

This operation involves cutting at an angle to create a ramp or inclined plane on the workpiece.

Thread Milling

Unlike tapping, thread milling uses a multi-point tool to cut internal or external threads, allowing for better control over the thread fit and finish.

Helical Milling

This is used for machining helical shapes, such as helical gears or screw threads, by moving the tool along a helical path.

3D Milling

This involves cutting complex three-dimensional surfaces, often used in the aerospace, automotive, and mold-making industries.

Getting to Know CNC Milling Equipment

Frame/Base

The foundation that supports the machine and ensures stability and rigidity.

Spindle

The part that holds the cutting tool and rotates at various speeds to perform the cutting operations.

Cutting Tool

The end mill or other cutting instruments used to remove material from the workpiece.

Worktable

The platform where the workpiece is secured. It moves in the X, Y, and sometimes Z axes to position the workpiece relative to the cutting tool.

Control Panel

The interface through which the operator programs the machine and monitors its operation. It includes the display, keyboard, and various controls.

Tool Changer

An automatic system that holds multiple tools and changes them as needed during the machining process.

Cooling System

A system that delivers coolant to the cutting area to reduce heat, prolong tool life, and improve surface finish.

Axes

The CNC milling machine typically has three to five axes (X, Y, Z, and sometimes A and B) that allow for precise movement of the spindle and worktable.

Motors and Drive Systems

Motors (typically stepper or servo motors) and drive systems (such as ball screws or linear guides) that move the spindle and worktable along the axes.

CNC Controller

The computer numerical control unit that interprets the programmed instructions (G-code) and directs the machine’s movements and operations.

Fixture/Workholding Devices

Tools such as vises, clamps, and jigs used to secure the workpiece on the worktable.

Sensors and Feedback Systems

Devices that monitor various parameters (like position, speed, and load) and provide feedback to the CNC controller to ensure precision and accuracy.

Industries Where CNC Milling is Applicable

CNC milling is widely used in various industries due to its precision, versatility, and efficiency. Here are some of the key industries where CNC milling is commonly applied for manufacturing parts:

Aerospace

For producing complex and high-precision components like turbine blades, engine parts, and structural components.

Automotive

For manufacturing engine components, transmission parts, and various custom parts with tight tolerances.

Medical

For creating medical devices, implants, surgical instruments, and prosthetics with high precision and specific material requirements.

Electronics

For fabricating components such as housings, heat sinks, and intricate parts for electronic devices and circuit boards.

Defense and Military

For producing critical components used in defense equipment, weapons, and military vehicles.

Energy

For manufacturing parts used in the oil and gas industry, renewable energy systems, and power generation equipment.

Robotics and Automation

For manufacturing precision components used in robotic systems, automation equipment, and machinery.

Marine

For manufacturing components used in boats, ships, and marine equipment.

Cost Analysis of CNC Milled Parts

Understanding the cost factors involved in CNC milling is crucial for making informed decisions about manufacturing processes and budgeting.

Material Cost
Fixture Cost (based on the shape and size of the product)
Debugging Cost (programming and parameter adjustment)
Special Tool Cost (customization of forming tools and non-standard tools)
Processing Cost
Labor Cost (part of machine debugging and manual intervention during production)
Inspection Cost (inspection during processing and final product inspection fees)
Post-Processing Cost (subsequent processing procedures: tapping, laser marking, etc., surface treatment, heat treatment)
Packaging and Transportation Cost

Things to Consider When Looking for CNC Milling Services

When looking for CNC milling services, customers can encounter several pitfalls that can lead to subpar results, increased costs, and delayed project timelines. Here are some of the common pitfalls and how they can be avoided:

Pitfall: Opting for the cheapest provider can result in poor quality, lack of precision, and potential hidden costs.

Avoidance: Evaluate providers based on their reputation, quality of work, equipment, and customer reviews. Request samples or case studies to verify their capabilities.

Pitfall: Miscommunication can lead to errors in the final product, including incorrect dimensions, tolerances, or materials.

Avoidance: Ensure clear and constant communication throughout the project. Provide detailed drawings, specifications, and requirements. Use a service provider with a robust customer management system that allows real-time tracking and feedback.

Pitfall: Some CNC milling service providers specialize in specific types of materials or industries. Choosing a provider without the relevant experience can lead to poor results.

Avoidance: Select a provider experienced in working with the specific materials and parts you need. Verify their expertise in your industry through previous work examples.

Pitfall: Providers without stringent quality control processes can deliver inconsistent and flawed parts.

Avoidance: Check the provider’s quality assurance protocols. Look for certifications such as ISO 9001 and inquire about their inspection and testing procedures.

Pitfall: Without proper technical support, customers may face difficulties in resolving issues, leading to delays and increased costs.

Avoidance: Choose a provider that offers comprehensive technical support, from design to production, and can assist in troubleshooting and problem-solving.

Pitfall: Providers with long lead times or limited capacity may not meet your project deadlines, causing delays.

Avoidance: Discuss lead times upfront and ensure the provider has the capacity to handle your project within your timeline. It’s beneficial to work with a provider that offers fast turnaround times.

Pitfall: Outdated or poorly maintained equipment can result in lower precision and quality.

Avoidance: Verify that the provider uses modern, well-maintained CNC milling machines. Ask about the types of machines and software they use to ensure they can meet your precision requirements.

Pitfall: Without post-processing services, you may need to coordinate with additional vendors, increasing complexity and cost.

Avoidance: Look for providers that offer comprehensive services, including finishing, assembly, and inspection, to streamline the production process.

Pitfall: Long-distance shipping can lead to increased costs and potential damage during transit.

Avoidance: Consider the provider’s location relative to yours and factor in shipping logistics. Sometimes, a local provider can be more cost-effective and reliable.

Pitfall: Unfavorable contract terms can lead to unexpected costs and legal issues.

Avoidance: Carefully review all contract terms, including payment schedules, warranties, and liability clauses. Ensure you fully understand the terms before signing.

By being aware of these pitfalls and taking proactive steps to avoid them, customers can ensure they choose a CNC milling service provider that meets their quality, timeline, and budgetary requirements effectively.

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*If you have any design files that need to be sent, please email them to sales@richconn.com