Leading CNC Machining & Fabrication.

Nordon Pty Ltd

CNC Machining Specialists


29 Furness Ave. Edwardstown, 5039, South Australia.

Opening hours

Mon – Fri: 9AM – 5PM


This post provides guidance on optimizing aluminium CNC machining to achieve better results and cost efficiency, focusing on material selection, design considerations, and effective machining strategies.

Understanding the benefits of aluminium CNC machining

Aluminium CNC machining offers numerous benefits, making it an ideal choice for various projects.

Aluminium’s Inherent Properties

Aluminium is widely recognized for its outstanding corrosion resistance, which is primarily attributed to its natural oxide layer. When aluminium is exposed to the atmosphere, a thin layer of aluminium oxide forms almost instantaneously on its surface. This oxide layer is passive, adherent, and impermeable, providing a protective shield that prevents further oxidation of the underlying metal. It acts as a barrier, inhibiting the penetration of corrosive agents, thus ensuring that the aluminium remains intact even in aggressive environments.

Self-healing Mechanism

One of the fascinating features of this oxide layer is its self-healing ability. If the aluminium surface is scratched or damaged, the exposed region will react with oxygen in the environment and form a new protective oxide layer. This ensures that the intrinsic corrosion resistance is not compromised even when the metal undergoes mechanical processes or sustains minor damages. This inherent characteristic is particularly beneficial in machining processes like CNC (Computer Numerical Control), where metals are often subjected to mechanical stresses.

CNC Machining and Aluminium’s Advantage

CNC machining can produce significant amounts of heat and sometimes be harsh on the machined material. Aluminium’s natural corrosion resistance ensures that the metal does not degrade rapidly during machining. Moreover, aluminium is a relatively soft metal compared to steel or titanium, so it’s easier to machine. This ease of machinability and its corrosion resistance means less wear is imposed on the machining tools, resulting in longer tool life. This translates to faster production times and reduced operational costs.

Enhanced Corrosion Resistance with Alloys and Treatments

While pure aluminium offers commendable corrosion resistance, its properties can be further enhanced through alloying and surface treatments. Different alloying elements, like manganese, silicon, magnesium, and zinc, can be added to aluminium to improve its strength and corrosion resistance.

Additionally, surface treatments such as anodising can increase the thickness of the protective oxide layer, further enhancing the metal’s resistance to corrosion. These enhancements improve the longevity of the aluminium components and make them more suitable for various CNC machined applications, especially those exposed to harsh environments.

Ideal for CNC Machining

In summary, aluminium’s inherent corrosion resistance and machinability make it an ideal candidate for CNC machining processes. The metal’s ability to withstand aggressive environments, its self-healing oxide layer, and the potential for enhancement through alloying and surface treatments contribute to its widespread use in aerospace and electronics industries. As CNC machining continues to evolve and expand its horizons, the demand for materials like aluminium that offer both durability and ease of processing will undoubtedly remain high.

Factors to consider before choosing an aluminium CNC service provider

Selecting the right aluminium CNC service provider is crucial to ensure the success of your projects. Before making a decision, consider the following factors:

Experience and Expertise

Look for a service provider with extensive experience and expertise in aluminium CNC machining. This ensures that they have the necessary knowledge and skills to handle your specific requirements.

Equipment and Technology

Check if the service provider has state-of-the-art equipment and utilizes the latest CNC machining technology. This guarantees superior results and efficient production processes.

Quality Control Measures

Inquire about the service provider’s quality control measures to ensure strict quality checks are in place. This ensures that the final product meets your expectations and specifications.

Turnaround Time

Consider the service provider’s turnaround time and their ability to meet your project deadlines. Timely delivery is essential to avoid delays in your production schedule.

Cost and Pricing

Compare the pricing structures of different service providers to find the one that offers competitive rates without compromising on quality. However, keep in mind that the cheapest option may not always be the best choice.

By carefully evaluating these factors, you can select an aluminium CNC service provider that meets your requirements and expectations.

surface grinder with feeder

How to optimize your design for aluminium CNC machining

Optimizing your design for aluminium CNC machining is essential to achieve superior results and minimize costs. The following tips will help you maximize the efficiency of your design:

Simplify Geometry

Complex geometries can increase production time and costs. Simplify your design by reducing unnecessary features and avoiding overcomplicated shapes.

Minimize Material Waste

Design your project’s parts to minimize material waste by optimizing the nesting arrangement and reducing excess material. This not only reduces costs but also contributes to sustainable manufacturing practices.

Consider Machining Constraints

Understand the limitations of the CNC machining process and design your parts accordingly. Avoid undercuts, sharp corners, and thin walls that may be challenging to machine accurately.

Optimal Tooling Selection

Select the appropriate cutting tools, end mills, and tool coatings for aluminium machining. High-quality tooling ensures precise cuts and reduces the risk of tool wear.

Design for Assembly

If your project requires assembly, design your parts to facilitate easy and efficient assembly processes. Consider incorporating features such as snap fits or interlocking components.

By implementing these design optimization strategies, you can enhance the efficiency and cost-effectiveness of your aluminium CNC machining process.

Nordon has experienced mechanical designers who can adapt your project to CNC Machining. Discuss your project with us and we’ll work with you to ensure it’s design is optimised for CNC machining.  

Choosing the right aluminium alloy for your project

The choice of aluminium alloy plays a significant role in the success and costs for your CNC machining project. Each aluminium alloy has unique properties that make it suitable for specific applications.

Consider the following factors when selecting the right aluminium alloy:

Strength Requirements

Determine the required strength of your project to choose an alloy that meets those specifications. Different aluminium alloys offer varying levels of strength, ranging from soft and malleable to high-strength options.

Corrosion Resistance

Assess the environmental conditions your project will be exposed to. Some aluminium alloys offer excellent corrosion resistance, making them suitable for outdoor or marine applications.


Consider the machinability of the alloy to ensure smooth and efficient CNC machining processes. Some alloys are more easily machined, resulting in faster production times and reduced costs.

Thermal and Electrical Conductivity

If your project requires efficient heat dissipation or electrical conductivity, select an aluminium alloy with excellent thermal and electrical conductivity properties.

Cost Considerations

Evaluate the cost of different aluminium alloys and choose the one that fits your budget without compromising on quality and performance.

By carefully considering these factors, you can select the most appropriate aluminium alloy for your CNC machining project, ensuring optimal results. Nordon’s mechanical engineers can assist with design and material selection to ensure the success of your project.

Cost-saving strategies for aluminium CNC service

Minimising costs is a top priority for any CNC machining project. Implement the following cost-saving strategies to optimise your aluminium CNC service.

Material Optimisation

Minimize material waste by optimizing part nesting and reducing excess material. This not only reduces costs but also contributes to sustainable manufacturing practices.

Efficient Programming

Optimize your CNC machining programs to minimize tool paths and reduce machining time. Efficient programming ensures faster production and reduced costs.

Bulk Ordering

If possible, consider bulk ordering aluminium material or parts to take advantage of volume discounts. This can significantly reduce the overall project costs.

Value Engineering

Collaborate with your aluminium CNC service provider to identify areas where cost savings can be achieved without compromising on quality. Value engineering involves finding alternative materials or design modifications to reduce costs.

Continuous Improvement

Regularly evaluate your CNC machining processes and identify areas for improvement. You can reduce costs and enhance efficiency over time by continuously optimising your processes.

By implementing these cost-saving strategies, you can minimize expenses without compromising the quality and performance of your aluminium CNC projects.

Maximizing efficiency in aluminium CNC machining

Efficiency is key to achieving superior results and minimizing costs in aluminium CNC machining. Consider the following tips to maximize efficiency:

Feeds and Speeds Optimization

Determine the optimal feeds and speeds for your specific aluminium alloy and machining process. Adjusting the cutting parameters can significantly improve machining efficiency.

Tooling Selection

Choose high-quality cutting tools and tool coatings specifically designed for aluminium machining. Premium tooling ensures longer tool life and reduces the risk of tool wear.

Machine Maintenance

Regularly maintain and calibrate your CNC machines to ensure optimal performance and accuracy. Preventive maintenance helps avoid downtime and costly repairs.

Workflow Optimisation

Streamline your workflow by eliminating bottlenecks and optimizing the sequence of operations. Efficient workflow management minimizes idle time and maximizes productivity.

Employee Training

Invest in employee training to enhance their skills and knowledge in aluminium CNC machining. Well-trained operators can work more efficiently and reduce the risk of errors.

By adopting these efficiency-maximizing techniques, you can optimize your aluminium CNC machining process, improving productivity and reducing costs.

Quality control measures in aluminium CNC service

Maintaining high-quality standards is essential in aluminium CNC service. Implement the following quality control measures to ensure superior results:

Inspection and Testing

Perform comprehensive inspections and testing at various stages of the CNC machining process. This includes checking dimensions, surface finish, and other critical parameters to ensure compliance with specifications.

Documentation and Traceability

Maintain detailed documentation throughout the CNC machining process, including material certifications, inspection reports, and traceability records. This ensures transparency and accountability.

Statistical Process Control (SPC)

Utilize SPC techniques to monitor and control the CNC machining process. Statistical analysis helps identify and address any variations or anomalies before they impact the final product quality.

Continuous Improvement

Foster a culture of continuous improvement by regularly reviewing quality metrics, gathering feedback, and implementing corrective actions. This ensures ongoing enhancement of your CNC machining processes.

By implementing these quality control measures, you can consistently deliver high-quality aluminium CNC machining services that meet or exceed customer expectations.