Slit dimensions for CNC machined parts

Hello MarcoIng, the minimum slot width for CNC machining of aluminium can vary based on several factors. Typically, a cutting width of about 0.5 mm (or 500 microns) is considered feasible, but it is crucial to consider the specific capabilities of the CNC machine and the tools that will be used. Also, since the milling depth also impacts the tool choice, the radius of the internal corners in the milling must be R=working depth/4 (mills cannot cut straight angles) and not less than 1.5 mm (this rule is specified on our website). For works with a width less than 0.5 down to a minimum of 0.3, EDM technology is used

Absolutely yes. The length of the slit in relation to its width (the aspect ratio) can actually affect the producibility. Longer slits with reduced widths can create issues during machining, such as tool deviation or breaking. It is essential to find a balance between the desired slit size and the practical limits of CNC machining.

Sure, but also consider another aspect: the surface finish of the slit. Smaller slits may require finer finishing tools and special techniques to achieve the desired surface quality. This can impact both production times and costs, so it’s essential to clearly communicate your needs to the supplier.