Aluminium turning requires a careful technical and strategic approach. This metal is softer than steel and tends to form long, adhesive chips that risk sticking to the tool during machining, compromising surface finish. Its high thermal conductivity also demands strict control over cutting temperatures.
That’s why the choice of the right tooling, cutting parameters and lubricants is crucial to ensure precision and repeatability.

The choice of tools and cutting materials in aluminium turning

The use of specific tools for aluminium turning promotes chip removal and reduces burr formation, a particularly critical phenomenon in light alloys due to their tendency to adhere. In particular, the use of carbide inserts with non-stick coatings helps reduce wear and improve surface quality.
The most effective coatings include polycrystalline diamond (PCD), which is the optimal choice for high-volume production due to its exceptional resistance to abrasive wear, and titanium aluminium nitride (TiAlN), suitable for less intensive but still high-performing applications.
In aluminium turning it is essential to choose positive cutting angles and sharp geometries, which help avoid deformation and material build-up on the cutting edge.
To optimize both productivity and quality, it’s necessary to balance cutting speed, feed rate, and depth of cut. The material allows for high spindle speeds, but vibration and overheating must be avoided.

Operational challenges in aluminium turning

Vibration and overheating can compromise both the quality of the part and the tool’s lifespan. Vibrations are especially problematic when machining thin components or those with high length-to-diameter ratios.
Localised overheating can cause dimensional deviations during aluminium turning and residual deformation when cooling.
Using a suitable lubrication and cooling system helps to dissipate heat and remove chips from the cutting zone, improving surface finish and extending tool life.
Special care must be taken to ensure frequent cleaning of the work area, as chips tend to accumulate and may be re-aspirated into the machining system, causing surface scratches or tool damage. Implementing these solutions in aluminium turning also helps to optimise cycle times and reduce unplanned stops.

Aluminium automatic turning at Sarbo

Sarbo’s advanced equipment and know-how enable excellent results in automatic aluminium turning, with competitive costs and short lead times, without compromising quality standards.
Over the years, our company has developed specialised expertise in machining light alloys, optimising processes and parameters to maximise production efficiency and minimise waste, following Lean Production and Six Sigma principles.
Sarbo uses high-speed CNC lathes, with minimum quantity lubrication (MQL) or internal tool cooling. Aluminium can also be machined with mechanical multi-spindle lathes to achieve economies of scale for high-volume batches.
Real-time monitoring systems ensure consistency and quality throughout the automatic turning of aluminium alloys.
Performance is monitored daily using the OEE (Overall Equipment Effectiveness) system.

Discover Sarbo’s capabilities in aluminium and metal turning.