AL6061-T651 is an aluminum alloy that combines excellent mechanical properties with good corrosion resistance and weldability. Its T651 temper designation signifies that it has undergone a solution heat treatment followed by artificial aging to achieve optimal strength and stability. The alloy's versatility and relatively low cost make it a popular choice for various applications in the automotive, aerospace, and construction industries.

When machining AL6061-T651 with CNC equipment, several crucial considerations come into play. Firstly, the material's hardness and machinability must be taken into account to determine the most suitable cutting tools and machining parameters. The use of sharp and properly maintained cutting tools is essential to achieve smooth and accurate cuts. Additionally, it is recommended to use appropriate cutting fluids to reduce friction and heat generation during the machining process.

Furthermore, AL6061-T651 is susceptible to galling and work hardening, which can affect the surface finish and tool life. Therefore, it is important to maintain a consistent cutting speed and feed rate to minimize these effects. Regular inspection of the workpiece and cutting tools is also crucial to ensure that machining operations remain within the material's tolerances.

Moreover, AL6061-T651 can be challenging to machine due to its sticky nature, so it is essential to use the right type of lubricant and coolant to prevent tool sticking and improve the surface finish of the machined parts.

In summary, AL6061-T651 offers a unique combination of properties that makes it suitable for a wide range of applications. However, machining this material requires careful consideration of its machinability, hardness, and susceptibility to galling and work hardening. By following best practices and using the appropriate tools and machining parameters, CNC machining of AL6061-T651 can be achieved with high precision and efficiency.