Material Removal Rate Calculator
Material removal rate says how fast a machine takes metal away, as a volume per minute. It helps compare cutting setups and estimate how long a cut will take.
- Free
- Works offline after your first visit
- Saves on this device
- No sign-up
- Updated
How it works
For milling, the rate is the cut width times the depth of cut times the feed speed. For turning, it is pi times the diameter times the depth times the feed speed. For drilling, it is the hole area times the feed speed, and the depth is not used.
Everything is worked in metres and seconds first, and the answer is shown in cubic centimetres per minute.
Worked example
With Milling selected, a size of 0.5 in, a depth of 0.1 in and a feed of 0.1 ft/s, the rate is 59 cubic cm per minute.
Questions
Which feed speed do I enter?
Use the table feed from your cutting data, which is how far the work moves each minute. Machine programs and cutting charts usually list it.
Is the turning figure the same as spindle speed?
No. Turning here uses the diameter and the axial feed rate. Spindle speed is a different setting and does not enter this formula directly.
Why does drilling ignore the depth?
The drill cuts a circle as wide as its diameter, so the cut area depends on the diameter and the feed speed.
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