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SESK: Stuff Everyone Should Know · sesk.info/eng-machining-subtractive

What makes machining a subtractive manufacturing process?

Machining removes material from a workpiece to create the desired shape.

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  1. It cuts material away ✔
  2. It adds one layer at a time
  3. It squeezes metal into a die

Why: Turning, drilling, milling, and grinding shape a part by removing chips or particles. This contrasts with additive processes that build material up.

Huh, didn't know that: Machining can achieve accurate dimensions and surface finishes, but removed material and tool wear affect cost.

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The machinist solved the problem by cutting to the point.
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References

Answer: It cuts material away. Turning, drilling, milling, and grinding shape a part by removing chips or particles. This contrasts with additive processes that build material up.

  1. NIST Core Manufacturing Simulation Data Information Model tsapps.nist.gov/publication/get_pdf.cfm?pub_id=821118
    MaterialRemoving is a shaping activity that removes material from a workpiece to get the anticipated shape.
    Checked 2026-10-10.

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