Process Milling
Milling can be used for relatively complex geometry and is used for both single part production and high volume production (optimized equipment). Narrow tollerances and good surface quality is possible. Smooth free form surfaces often require long processing times due many tool passes. Undercuts normally require reclamping of the part.

In milling a rotating tool cut excess material away from a part that is moved relatively to the tool. Tools have a single or multiple cutting edges and many diffrent shapes.

The number of axes (normally 3 or 5) refer to the number of diffrent movements for the part in a Numerically Controled (NC) milling machine. A 3-axis machine can simultaneously moove the part in an x-, a y- and a z-direction allowing for free form shapes.
Danish Name Fręsning
Category Reducing processes, Cutting
Video Milling of a model house
Materials Metals Plastics
Price notes Low to moderate cost. Tolling cost is relatively low.
Environmen- tal notes Milling produce a significant amount of waste material which normally can be recycled.
Additional info Part material has to be softer than the cutting tool material. Certain types of hard steel can therefore be difficult to mill.
Keywords Free form
high tolerances
Good surface quality
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