When it comes to aluminum machining companies, understanding what they offer is essential. Whether you need high precision parts for industrial machinery or custom components for specialized applications, choosing the right partner can make all the difference.

Here’s a quick overview of what you should be looking for in aluminum machining companies:

Benefits of Aluminum Machining

Aluminum is a top choice for CNC machining due to its excellent machinability, low weight, and versatility. It’s widely used in industries like automotive, aerospace, and electronics. Key benefits include:

Aluminum also offers high thermal and electrical conductivity, making it perfect for parts where heat and electrical management are critical.

Benefits of Aluminum Machining - aluminum machining companies infographic step-infographic-4-steps

Best Grades of Aluminum for Machining

When it comes to aluminum machining, choosing the right grade is crucial. Different grades offer varying properties that make them suitable for specific applications. Here are some of the best grades:

Aluminum 6061

Aluminum 6061 is the go-to choice for many machinists due to its excellent machinability and versatility. It’s often used in applications requiring good mechanical properties and weldability. Common uses include:

aluminum 6061 - aluminum machining companies

Key Properties:
Tensile Strength, Yield: 276 MPa
Fatigue Strength: 96.5 MPa
Elongation at Break: 17%
Hardness (Brinell): 95
Density: 2.7 g/cm³

Aluminum 7075

If you need strength, Aluminum 7075 is the way to go. This grade is known for its high stress-resistance, making it ideal for aerospace applications. Aluminum 7075 is often used where high pressure or force is involved.

Key Properties:
Very high strength: Suitable for high-stress environments
Moderate machinability: Requires precision tools
Common uses: Aircraft structures, sporting equipment

Aluminum 2024

Aluminum 2024 is another high-strength alloy, known for its excellent fatigue resistance. This makes it a popular choice for parts that undergo cyclic loading, such as bolts and aircraft fittings. However, it has poor corrosion resistance and requires surface treatments for harsh environments.

aluminum 2024 - aluminum machining companies

Key Properties:
Tensile Strength, Yield: 345 MPa
Fatigue Strength: 138 MPa
Elongation at Break: 18%
Hardness (Brinell): 120
Density: 2.78 g/cm³

Aluminum 6082

Often compared to 6061, Aluminum 6082 offers slightly better mechanical properties and is commonly used in Europe. It’s ideal for structural applications and is known for its high strength and good corrosion resistance.

Key Properties:
Good machinability: Similar to 6061
High strength: Suitable for structural parts
Common uses: Bridges, cranes, transport applications


MIC 6 is a cast aluminum plate known for its excellent dimensional stability and flatness. It’s often used in tooling, jigs, and fixtures where precision is critical.

Key Properties:
Excellent dimensional stability: Ideal for precision parts
Good machinability: Easy to machine with high-quality finishes
Common uses: Tooling, jigs, fixtures

Choosing the right aluminum grade depends on your specific needs—whether it’s strength, machinability, or corrosion resistance. Understanding these properties ensures you get the best performance out of your machined parts.

Next, let’s dive into the factors to consider when choosing an aluminum machining company.

Factors to Consider When Choosing an Aluminum Machining Company

Choosing the right aluminum machining company is crucial for your project’s success. Here are the key factors to consider:

Quality Certifications

Quality assurance is non-negotiable. Look for companies with certifications like ISO 9001 or AS9100D. These certifications indicate a commitment to consistent quality and adherence to industry standards. For example, TMC Technologies is ISO 9001 certified, showcasing their dedication to quality in every project.

Diversity Status

Supporting diverse businesses can be beneficial for multiple reasons, including meeting corporate social responsibility goals and fostering innovation. Check if the company is a certified minority-owned, women-owned, or veteran-owned business. These companies often bring unique perspectives and solutions to the table.

Machining Capabilities

Different projects require different machining capabilities. Ensure the company offers the specific services you need, such as:

Industry Experience

Experience in your specific industry can be a game-changer. Companies familiar with the challenges and standards of your industry will likely deliver better results. For instance, TMC Technologies has experience in sectors like aerospace, medical, and natural gas. Their familiarity with industry-specific requirements ensures they can meet stringent standards.

Case Study: TMC Technologies

TMC Technologies, based in Wisconsin, has been a trusted name in precision aluminum machining since 1944. They serve various industries, including aerospace and medical, and have a reputation for delivering on time and within budget. Their advanced CNC technology and commitment to quality make them a reliable partner for complex machining projects.

Pro Tips for Making the Right Choice

By considering these factors, you can select an aluminum machining company that meets your specific needs, ensuring the success of your project.

Top Aluminum Machining Techniques

When it comes to aluminum machining, there are several key techniques used to achieve precise and high-quality parts. Here, we’ll cover the most important ones: CNC milling, CNC turning, anodizing, and precision machining.

CNC Milling

CNC milling is a process where rotating cutting tools remove material from a workpiece. It’s perfect for creating complex shapes and intricate designs. Aluminum is ideal for CNC milling because of its excellent machinability. This technique is widely used in industries like aerospace and automotive, where precision is crucial.

– High precision and accuracy
– Suitable for complex geometries
– Efficient for both prototyping and full-scale production

CNC Turning

CNC turning involves rotating the workpiece while a stationary cutting tool shapes it. This method is best for creating cylindrical parts such as shafts, rods, and bushings. Aluminum’s low density and excellent machinability make it a prime candidate for CNC turning.

– High-speed production
– Excellent surface finish
– Ideal for producing symmetrical parts


Anodizing is a finishing process that enhances the surface of aluminum parts. It involves creating a protective oxide layer, which boosts corrosion resistance and improves appearance. There are three main types of anodizing:

– Enhanced corrosion resistance
– Improved aesthetic appeal
– Increased surface hardness

Precision Machining

Precision machining refers to techniques that achieve extremely tight tolerances and fine details. This is essential for industries where even the smallest error can lead to significant issues, such as medical devices and aerospace components.

– Ultra-high accuracy
– Consistent quality
– Suitable for complex and detailed parts

By understanding these top aluminum machining techniques, you can better appreciate the capabilities and applications of aluminum parts in various industries.

Common Applications of Machined Aluminum Parts

Aluminum parts are used in a wide range of industries due to their strength, light weight, and excellent machinability. Let’s dive into some of the most common applications:


In the automotive industry, aluminum is a game-changer. Its high strength-to-weight ratio helps make vehicles lighter and more fuel-efficient. Commonly machined aluminum parts in this sector include:

Using aluminum not only improves performance but also reduces emissions, making it a popular choice for eco-friendly vehicles.


Aerospace relies heavily on aluminum due to its light weight and high strength. This metal is crucial for both commercial and military aircraft. Key aerospace applications include:

Aluminum’s resistance to corrosion and ability to withstand extreme temperatures make it ideal for aerospace applications.

Industrial Equipment

In industrial settings, aluminum parts are essential for machinery and equipment. They are used because they are durable yet easy to machine. Common applications include:

These parts often undergo precision machining to meet tight tolerances, ensuring reliable performance in demanding environments.

Consumer Electronics

Aluminum is also a favorite in the consumer electronics industry. It offers a sleek appearance and excellent thermal conductivity, making it ideal for:

The anodizing process often enhances the appearance and durability of these parts, providing both aesthetic and functional benefits.

By understanding these common applications, you can see why aluminum is a versatile and valuable material across various industries.

Frequently Asked Questions about Aluminum Machining

What is the most commonly machined aluminum?

Aluminum 6061 is the most commonly machined aluminum alloy. This is due to its excellent machinability, medium-to-high strength, and good corrosion resistance. It is widely used in industries such as aerospace, automotive, and consumer electronics. The 6061 alloy is versatile and can be easily welded and anodized, making it a favorite for many applications.

Is aluminum cheaper to machine than steel?

Yes, aluminum is generally cheaper to machine than steel. There are several reasons for this:

However, the actual cost can vary depending on the complexity of the part and the specific type of aluminum or steel being used. For example, high-strength aluminum alloys like 7075 can be more expensive than some types of steel.

What is the best aluminum to mill with?

The best aluminum to mill with depends on your specific needs, but Aluminum 6061-T6 is a top choice for many applications. It offers a good balance of strength, machinability, and corrosion resistance.

For high-stress applications, Aluminum 7075-T6 is another excellent option due to its superior strength and hardness, although it is less corrosion-resistant than 6061.

For applications requiring high precision and stability, MIC 6 aluminum cast plate is ideal. It is known for its excellent flatness and dimensional stability.

By understanding these key considerations, you can choose the right aluminum alloy for your specific machining needs.


Next, let’s dive into the various top aluminum machining techniques and how they impact the final product.


At TMC Technologies, we specialize in providing top-notch aluminum machining services tailored to meet the unique needs of our clients. Our extensive industry experience, advanced capabilities, and commitment to quality set us apart from other aluminum machining companies.

Why Choose TMC Technologies?

1. Advanced Capabilities

We utilize state-of-the-art CNC technology to deliver precision machining services. Our capabilities include 4-axis and 5-axis milling, swiss machining, and even micromachining. This allows us to achieve tolerances as tight as 0.0005″, making us the go-to partner for industries requiring high precision.

2. Industry Experience

Since 1944, we’ve been a trusted name in the machining industry. Our expertise spans across various sectors, including automotive, aerospace, industrial equipment, and consumer electronics. Whether you need components for aircraft, medical devices, or high-tech prototypes, we have the experience to deliver.

3. Quality Assurance

Quality is at the heart of everything we do. Our stringent quality assurance and inspection processes ensure that every part we produce meets the highest standards. We are committed to delivering on time and within budget, without compromising on quality.

4. Custom Solutions

We understand that each project is unique. That’s why we offer custom aluminum machining services tailored to your specific requirements. From initial design to final production, we work closely with you to ensure that your vision becomes a reality.

Ready to Get Started?

Choosing the right aluminum machining company is crucial for the success of your project. With TMC Technologies, you can be confident that you’re partnering with a company that values quality, precision, and customer satisfaction.

Explore our capabilities to learn more about how we can assist you with your next project.

Thank you for considering TMC Technologies for your aluminum machining needs. We look forward to helping you achieve your goals with our precision machining services.