CNC Milling Services


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We offer CNC milling services for any type of custom CNC parts, whether plastics or metals, simple or complex. Our precision 3-, 4-, and 5-axis CNC machines, combined with other advanced capabilities and our experienced team, can provide high-quality CNC machined parts and fast delivery. We guarantee your CNC milling projects will be handled smoothly by our in-house CNC machining department and supplier network. As a result, you can focus on bringing your product to market. If you need a reliable CNC milling company, 3ERP will never let you down!

Our CNC Milling Capabilities

This video shows how we mill a precision and complex part from our 5-Axis CNC milling machines with different tools and how we guarantee the quality by using an on-machine inspection system.

Our experienced CNC machining engineers can select the right tools and optimize tool paths, achieve an ideal CNC milling surface, and keep tight tolerances. We can provide all types of custom CNC machined parts to meet your project needs.

If you are having problems getting your CNC milling parts done, contact us and try to get a solution from 3E.

Why Choose Us for Custom CNC Milling?

The Top 3 Reasons:

Cost Efficient
Cost Efficient

80% of aspect and mechanical parts can be CNC milled within minutes or even seconds by optimizing the tool paths and using special cutting tools. Our automation setup for CNC milling is super cost-efficient for mass production. It helps reduce CNC machining costs compared with additive manufacturing in most cases.

Materials & Finishes Options
Materials & Finishes Options

Besides our fast turnaround time, we have various types and specs of plastic and metal blocks available for CNC machining processes. We can also provide different surface finishing for CNC machined parts, such as painting, anodizing and chroming. It's an excellent combination of function and aspect.

Unlock Complexity
Unlock Complexity

Because the cutting tools of a milling machine can approach the workpieces from several different angles, it is possible to create CNC machined parts with complex shapes. With more axes, we can create milled parts with greater complexity. Milling is often the best bet if a project demands an irregular shape.


See why our customers love us

We received the CNC parts that you made for us, and I finally had a chance to open up the box and have a look at them today. They look very good! I am very impressed with the quality of your parts. The small details look very accurate, and the clear silver anodizing on the aluminum parts looks very clean and bright. Very nice work. Thank you!

We will definitely use 3ERP's CNC milling services again in near future.

Aaron client
Mechanical Design Engineer

Parts arrived us today. Such beautiful milled parts mate! Our team assemble the parts earlier which goes smoothly. Parts are as precise as we expected. Please pass my thanks to your production team, they are doing a great job!

I am so glad that we found you guys online and eventually ordered from you guys. We are going to send you more CNC milling projects for quote soon.

Raymond - Design Manager
Design Manager

CNC Milling Materials Options

rapid prototype parts


CNC milling of plastics is the most common and economical way to create rapid prototypes and review the appearance and function of your design.

rapid prototype cnc parts


CNC milling is a popular way to produce both rapid prototyping of metal parts and final parts. Common metals include aluminum, magnesium, steel, brass, copper, etc.

cnc machining for ceramics

Other Materials

Besides plastics and metals, we can also work with ceramics such as Alumina, ZrO2, AIN, Si3N4, and SiC. Wood and marble are also on our list.

Typical CNC Milling Parts That We Offer

Our CNC milling service is a highly flexible way to create a prototype or manufacture high-volume end-used parts. Able to handle a wide range of milling materials, our CNC machining capabilities are ideal for most projects. Our CNC experts know how to cut your parts fast to reduce costs. They are also skilled in milling the complex geometry to tight tolerances that custom-designed milled parts in different materials require. We have delivered a million+ high-quality CNC parts to our worldwide customers.

3ERP Mold Components

Mold Components

CNC milling plays a crucial role in mold making. Mold cavities, mold bases, sliders, lifters, and other mold components can be milled.

3ERP Plastic and Metal Valves

Plastic and Metal Valves

Parts like valves and engine houses require complex geometry and tight tolerances. We can make such parts with our 5-axis CNC milling.

3ERP Medical Parts

Medical Parts

CNC milled implants in medical-grade material. We are familiar with bone fracture plates and other components which can be used in surgery.

3ERP Automotive Prototypes

Automotive Prototypes

Besides mechanical parts such as aluminum engine houses and covers and steel shafts, we can also manufacture parts with tiny features like light guides and reflectors.

3ERP Machine Components

Machine Components

This is a rotating cutter for mask machines. It must be sharp but also maintain the concentricity under +/-0.01mm.

3ERP CNC Milled Adapters

CNC Milled Adapters

CNC milled aluminum adapters with tight tolerance for dimensions and angles of the holes, with an alodine finish.

How to Get Your CNC Milling Parts

in 4 Simple Steps

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Upload a CAD File

To start, simply fill in some basic details and upload a 3D CAD file.

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Quote & Design Analysis

You'll receive a quote shortly, and we'll send your design for manufacturability (DFM) analysis if necessary.

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Order Confirmation

Once you review the quote and place your order, we'll start the CNC manufacturing process and do surface finishing afterward if needed.

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Parts are Shipped!

Your CNC prototypes or production CNC milled parts will be inspected and delivered straight to your doorstep.


Overview: What is CNC Milling?

What is CNC milling?

CNC milling is just one of the Computer Numerical Control machining processes available. Milling is a particular form of precision machining. Milling uses a cutter that removes material by moving into the workpiece at an angle. The movement of the cutter is controlled by computer instructions, allowing for extreme precision and repeatability.

CNC Milling is different from CNC turning, another popular CNC machining service. Turning uses a single-point cutting tool to cut the workpieces from block or bar materials while they rotate at speed in a chuck. Unlike CNC milling, CNC turning is generally used to create round or tubular shapes.

CNC milling can be used for rapidly manufacturing either prototypes or end-use parts.

How CNC milling works

Like other CNC machining processes, CNC milling begins with designers creating a digital part using CAD (Computer Aided Design) software. The file is then converted into “G Code,” which can be recognized by a CNC mill.

CNC mills have a “worktable” and work holding device to keep a block of material — known as the “workpiece” — in place. The worktable may or may not move, depending on the style of the milling machine.

During the CNC milling process, the rapidly rotating cutting tool makes contact with the workpiece, cutting away material. The cutting tool moves according to the G-Code instructions, cutting in the programmed places until the part is finished. Some CNC mills use moving worktables to create even more cutting angles.

CNC mills can cut through hard metals such as stainless steel. This makes them more versatile than CNC routers which, despite being similar to 3-axis mills, are less capable of penetrating hard materials.

CNC mills are different from CNC lathes or turning centers, where the workpieces rotate rather than the cutting tools.

Different types of CNC mill

CNC mills are often defined by their number of axes. More axes mean they can move their tool and/or workpieces in more ways. This enhanced cutting flexibility results in the ability to make more complex parts in a shorter time.

3-axis: Standard CNC mills have 3 axes, allowing the spindle (and attached cutting tools) to travel along the X, Y, and Z axes. If the cutting tool cannot reach an area of the part, the part must be removed and manually rotated.

4-axis: Some CNC mills incorporate an extra degree of movement by rotating on a vertical axis. This enables greater flexibility and the ability to create more complex parts.

5-axis: The most advanced type of widely used CNC mill is the 5-axis mill, which incorporates two extra degrees of movement, often by adding rotation to the worktable and spindle. Parts usually don’t require multiple setups since the mill can manipulate them into different positions.

Cutting tools for CNC mills

CNC mills can be fitted with different cutters/tools to enable different types of cutting. These include end mills, face mills, slab mills, fly cutters, ball cutters, hollow mills, and roughing end mills.

CNC Machining FAQs

Why use CNC milling?

Besides CNC turning, CNC milling is one of the most popular custom manufacturing processes. CNC milling is used for the majority of machined parts because it can handle a wide variety of irregular geometries. It is also an efficient means of mass production once the setup is complete.

What kind of equipment do you use?

3ERP’s facilities contain high-end 3-axis, 4-axis, and 5-axis CNC machining centers, including models from Haas and JingDiao.

Can I combine milling with other processes?

Yes. We can use a CNC machine to mill details, features, and text onto parts made using other processes like casting and 3D printing.