Do not despair if you have bought yourself a sheet of 5005 as there are ways to cut without any hassle. This grade is common for 1-6mm aluminium and is called aluminium sheet. From experience this grade of aluminium will gum almost instantly if cut dry (without coolant) due to excessive heat. If you want to get all nerdy, read this paper. There are two types of grades that are commonly found at your local aluminium merchant for sheet between 1 and 6mm.ĥ005 has a thermal conductivity value of 201 W / m. the lower the thermal conductive of the grade, the lower the temperature generated when cutting. This is usually because the grade of aluminium used causes the majority of issues they are experiencing. It is true that all aluminium grades are machinable but each grade will require a different approach. The first question I ask when someone calls about cutting aluminium is "What aluminium are you using?". Not all aluminium should be treated equally. Keep in mind that the rigidity of the CNC machine will impact the recommended feed and speed.īy following these steps, you can safely and effectively cut aluminium with a CNC machine. Use a tool like FSWizard, a handy smartphone app and online web calculator, to determine optimal feeds and speeds.Secure the material to the waste board to prevent vibration, which can generate unnecessary heat and noise.This can help prevent cutting too deep on the first pass. Ensure that the waste board is levelled and the material is flat.A damaged or gummed end mill will not perform well. Inspect the condition of the router bit for chips and aluminium reweld.Keep in mind that a gummed up router bit can quickly shoot chunks of aluminium or parts of the router bit itself.īefore starting each cut, take the following steps: Always wear approved safety glasses as a minimum. It's essential to prioritize safety when cutting aluminum with a CNC machine. Keep in mind that it's essential to choose the right tool and adjust settings to achieve the desired results. CNC milling on the other hand has its own nuances and requires appropriate tool-paths, coolant, and 2 or 3-flute end mills. The guide applies to CNC router machines for cutting, slotting and basic profiling applications. However, you may need to adjust settings to suit your machine's capabilities. This guide is suitable for CNC machines of all levels, as the principles are the same. The following tips can help increase your confidence when cutting aluminium with a CNC machine: Cutting aluminium can be challenging, but it doesn't have to be.
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