Material Removal Rate (MRR) – what is it, how is it calculated ?
Here’s a brief explanation of what is Material removal rate, the Material removal rate formula for milling, and the Material removal rate formula for turning.
From month to month or quarter to quarter, as you buy more efficient (and expensive) machines, cutting tools and fixtures, you should be cutting more metal in the same time. How do you ensure that this is happening, and track your progress ? The MRR is a single number that enables you to do this. It is a direct indicator of how efficiently you are cutting, and how profitable you are.
MRR is the volume of material removed per minute. The higher your cutting parameters, the higher the MRR.
Material removal rate formula for milling
D: Depth of cut, mm.
W: Width of cut, mm.
F: Feed rate, mm/min
MRR = (D x W x F / 1000) cc/min.
Material removal rate formula for turning
D: Depth of cut, mm.
F: Feed rate,mm/rev.
S: Cutting speed, m/min
MRR = D x F x S cc/min
Text and pics. source: CADEM NCyclopedia multimedia CNC training software.
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