CNC drilling is a cutting process using a computer numerical control (CNC) machine. A rotary table with a spindle usually drives the tool's axis, which may be linear or helical and can move radially, axially or circumferentially
The drill point of the bit is usually made of hardened steel and has a helix in its center. The drill point is fed into the workpiece by means of a collet chuck (or chucks) at high speed using an arbor that rides on an inner channel machined in the tool's body. The collet can take both manual and automatic feeders.
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