What is CNC Milling?
CNC milling refers to the machining process of instantly detracting materials from raw stocks until the desired shape is done. CNC milling services are done by round cutters or most commonly known as endmills, which chip away materials in a lateral way with would narrow pits of cut.
Most details such as spindle speed, tooling, depth of cut, and cutter type are handled at machine shops. However, there are also other things that you can do as you design your products not only to ensure they can be made but also to make lean products that do not break your budget.
T-artisan offers precision CNC Milling services for multiple industries and wide reaching applications
Here are a few of the best practices and tips in CNC Machining:
Avoid Sharp Internal Corners
Since milling is usually done using round tools, you cannot achieve sharp internal corners. It is required to have radiused corners that are larger than the cutter that you will use. For example, you can use a ¼” cutter for fillets that are larger than 1/8”.
Avoid Narrow, Deep Slots
The final depths of cut of a round cutter or endmill should not be more than 5 times the diameter for steel, 10 times the diameter for aluminum, and 15 times the diameter for plastics. The reason for this is that long tools have the tendency to vibrate and deflect which result in a bad surface finish.
For instance, there is a slot for machined steel part which is .55” wide (t be cut with a .5” endmill) should not be deeper than 2.75”. The above point of the internal fillet radius is reliant on this. This means that any internal radius for this should be higher than .25.”
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