Service Overview

CNC Milling Service

CNC mills produce parts of nearly any shape from soft metals like aluminum, harder metals like steel, and plastics such as acetal.

eMachineShop offers cost-effective milling solutions whether you need a single part, batch of prototypes, or full production order.

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  • Can produce parts of almost any shape
  • Cost-effective for prototyping and short runs
  • High dimensional tolerances are possible
  • Smooth finishes can be achieved

Design Considerations

  • Use shapes that will hold well during machining, like straight edges
  • Milling creates a visible cut pattern on the surface of the material
  • Avoid deep pockets and ensure corners are rounded
  • Avoid flimsy shapes

What is CNC Milling?

CNC Milling is an automated process used to manufacture 2D and 3D parts by removing material from raw stock.

To make a CNC milled part, a block or sheet is placed on a table below a spindle which holds a cutting tool. A computer controls the tool used, the rotation speed and the vertical motion of the spindle, and the horizontal motion of the table. This allows loaded cutters such as drills, taps and end mills to remove portions of the material to create shapes.

CNC milling components displayed on a white background

eMachineShop Milled Parts

aluminum milled box for electrical compontents

2 attachable complex milled metal parts

milled curved plastic part with a hole through the middle

milled metal arc part with 2 holes through the ends

milled aluminum parts with multiple holes on the sides and one big threaded hole in the middle

2 black milled metal parts with multiple milled holes

black cnc milled pastic clip

2 milled metal parts on a white background

What is a CNC Milling Machine?

CNC milling machine

A milling machine is designed to produce premium parts with a high level of detail and finish. It uses rotary tools to cut away at the material by following the instructions from a CAD file to create a part design.

A milling machine computer controls the cutter’s function and coordinates, while minimum human input is required to complete the task. These machines are involved in the mass production of many components from different materials and plastic.

The primary function of a milling machine includes cutting workpieces into the desired shape. Based on the number of axes this machine has, the more complicated the final piece can be. It’s used for copper milling, steel milling, and other materials.

Why Is CNC Machining Service Important?

CNC services and milling machine options enable solutions to many problems. This technology ensures efficient and effective working processes that result in improved manufacturing technologies. For instance, we could hardly imagine cutting metal to produce car parts or aerospace components without custom CNC milling. While possible, this process would be much riskier and could pose a serious threat to people working on-premises.

With the help of computer software, we can access and create high-definition designs that are easily converted into Cartesian coordinates. CNC milling also has a goal to minimize the costs of prototyping.

However, this technology isn’t for industrial purposes only. It’s widely used in woodworking, aluminum machining, prototyping, and modeling, just to name a few.

CNC machining service and tool workshop

Cutting Tools Used in CNC Mills

cnc mill cutting tools and the shape of the cuts they make

Plain End Mill

plain endmill drill attachment

Creates walls with straight 90 degree edges and sharp corners at the bottom of recesses.

Chamfer End Mill

chamfer endmill attachment

Creates 45 degree bevels on the top edge of a wall or recess.

Ball End Mill

ball endmill attachment

Creates rounded edges at the bottom edge of a recess.

Rounding End Mill

rounding endmill attachment

Creates rounded edges at the top edge of a wall or recess.

Dovetail Cutter

dovetail cutter endmill attachment

Typically used to cut the pins and tails of dovetail joints.

Order custom cnc parts in just a few steps! See how here:

Preparing CAD Models for CNC Machining

CNC machining offers many advantages compared to other processes including precision and quick turns. CNC machining is among the most demanded services due to its accuracy and efficiency. CAD (Computer Aided Design) enables realistic computer models of parts to be built and assembled using CNC machining, beginning with sketching a design model on CADsoftware. The completed design is then converted into other file formats where it is then imported into CAM/CNC software and converted into G-code, the programming language that directs the CNC machines.

Considerations for Custom CNC Milling

With CNC machining, manufacturers can quickly produce CNC prototypes and durable parts for various applications. When selecting CNC machining materials consider that only stainless steel is corrosion resistant. For a lightweight product, low-density metals should be considered such as aluminum, beryllium, titanium, and magnesium alloys.

Elements and alloys able to withstand high temperatures include titanium, stainless steel, nickel, and tantalum. Finally, material costs should be considered for custom CNC milling projects since material costs impact total cost.

Metalworking CNC milling machine

Common CNC Milling Metals

Industrial milling machine tool with mill

For custom milling projects, any metal or plastic, which is hard enough for machining, can be machined. The most common material used for CNC machining by CNC machine shops are aluminum alloys, which are naturally resistant to corrosion.

The 6000 series is most commonly seen in milling machine shops. Stainless steel alloys are also common since they are resistant to corrosion and wear, as well as carbon steel, titanium, and nylon, a chemically resistant, strong, durable, thermoplastic material.

What our customers say

Thomas Howlett
Thomas Howlett
May 12, 2022.
I haven't had anything made by them, but I've used their software to design some prototypes and get quotes. Maybe soon.
Brian Spellman
Brian Spellman
May 12, 2022.
Got the part made as exactly I wanted it for my RV converted bus project.
Richard Raney
Richard Raney
April 29, 2022.
very efficient quoting and reasonable price, but slow delivery. Products are excellent.
November 9, 2021.
Fair, fast quote. Materials were manufactured quickly and shipped about a week ahead of schedule. Thank you!
Maite Azcorra
Maite Azcorra
November 5, 2021.
Perfect execution, perfect service, perfect timeliness. What else can you ask from a custom machining service. Thanks!
Bill Clancy
Bill Clancy
October 28, 2021.
Perfect. Aluminum was cut exactly as specified in my diagram and fit perfectly.
Mike Wolff (The Wulfff)
Mike Wolff (The Wulfff)
October 18, 2021.
Needed gripper fingers for robot arm; Good final product, great price, accurate to print, fits on the robot, alignment not 100% but within tolerance. Week or so delay from initial due date, as was expected due to complexity of the shape. Overall would have liked notification of delay, need to keep checking back otherwise you aren't notified until it ships, but would use the service again.

Frequently Asked Questions

Q: What is a cnc mill?

A: A CNC mill machine uses computer numerical control to create various types of components. CNC mill machines are commonly used in the manufacturing industry to create parts for cars, computers etc. Desktop CNC mills are smaller versions of these machines that can be used for small-scale applications.

Q: What is 3 axis cnc machine?

A: A three-axis CNC machine is a computer-controlled machine tool that has three axes of motion: the X-axis, the Y-axis, and the Z-axis. A three-axis CNC machine can perform many different machining operations, such as drilling, milling, turning, and engraving.

Q: What can you make with a milling machine?

A: Milling machines are most commonly used in machine shops, where they are used to create parts for a variety of industries. They can be used to create both small and large parts and can be fitted with a variety of attachments to perform different tasks.


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