CCGT09T304-AK Aluminum Insert Case Study | CNC Turning Finish
Case Study: How CCGT09T304-AK Aluminum Inserts Support High-Quality Surface Finishes for a French CNC Engineer
When turning aluminum alloys, achieving a smooth surface finish and maintaining dimensional accuracy are key objectives for CNC machinists. Recently, we received practical application feedback from one of our customers, David, a CNC technician based in France.
David used our CCGT09T304-AK (Grade CD6320) carbide inserts to machine precision components, demonstrating how the right geometry and grade can improve aluminum machining outcomes.

The Application: Engine Rings and Custom Plugs
David was contracted to produce specific automotive parts: a custom ring that goes on an engine and two custom plugs. Engine components typically require tight tolerances and a stable finish to ensure reliable performance under standard operating conditions.
Using our CCGT09T304-AK inserts, David successfully machined:
The Engine Ring: An aluminum sleeve featuring clean chamfers and a bright, smooth surface.
Two Custom Plugs: Threaded aluminum plugs with clear thread definitions and clean face finishes.
"It's a ring that goes on an engine, as requested by a customer. The other two are plugs that I made for your inserts," David shared, along with photos of the finished workpieces.
Why CCGT09T304-AK Works for Aluminum Turning
Aluminum alloys can be challenging to machine due to their tendency to stick and cause built-up edge (BUE), which can degrade the tool's cutting edge. Our CCGT09T304-AK CD6320 insert is designed to address these challenges:
Polished Rake Face (-AK Chipbreaker): The rake face of the insert is polished to reduce friction, helping aluminum chips slide off smoothly and reducing the likelihood of built-up edge.
Sharp Cutting Edge: The ground cutting edge shears through aluminum cleanly, lowering cutting forces and reducing burrs on the workpiece.
Reliable Grade CD6320: This uncoated, micro-grain substrate offers good wear resistance and thermal stability, contributing to a stable tool life and consistent dimensions across production batches.
The Result: Quality Parts and Smooth Operation
As shown in the comparison photos, the newly machined aluminum ring exhibits a clean, uniform finish. For CNC machine shops aiming to improve their efficiency, reduce tool change frequency, and deliver high-quality parts, our CCGT series offers a balanced combination of performance and cost-efficiency.
Are you working on precision aluminum turning projects? [Contact our technical team] to discuss matching insert geometries for your specific machining setups.














