What is DLC coating?
October 10, 2026 · Exactalloy Technical Team
What is DLC coating? This page gives the short answer first, then the reasoning and the numbers behind it.
Quick answer: Short answer: match the tool to the material group and the operation, then optimise with coating, geometry and parameters — and prove it with a trial cut rather than a catalogue claim.
The direct answer
Apply the general rule for the material group, then adjust for machine rigidity and the feature you are machining.
Why it works that way
Tool life is dominated by heat and chip thickness; both are controlled by surface speed, feed per tooth and coolant delivery.
How to verify
Measure parts per edge and surface roughness on a controlled trial, and record the values so they become a standard.
Where to go next
Use the related product and knowledge pages below, or send the job details to our application engineers.
Frequently asked questions
Is there a single correct answer?
No — the correct answer depends on material, machine and tolerance, which is why a trial cut matters.
Can I get help choosing?
Yes, application engineers will recommend a tool and starting parameters from your drawing.
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