Drilling

Drilling is a cutting process where a drill bit is spun to cut a hole of circular cross-section in solid materials. The drill bit is usually a rotary cutting tool, often multi-point. The bit is pressed against the work-piece and rotated at rates from hundreds to thousands of revolutions per minute.

This forces the cutting edge against the work-piece, cutting off chips (swarf) from the hole as it is drilled.

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Source: Wikipedia · Image: Wikimedia Commons · CC BY-SA 3.0

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