Material removal rate, abbreviated as MRR, is a measure of the volume of material that is removed from a workpiece in a machining operation, typically per unit of time. It indicates the efficiency of a machining process and helps in optimizing the machining parameters to maximize productivity. In general, higher MRR values indicate more efficient machining, leading to shorter production times. However, optimizing MRR also requires balancing with factors like tool wear, heat generation, and surface finish quality.
Material Removal Rate Formula |
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\( MRR \;=\; c_d \cdot c_w \cdot f \) (Material Removal Rate) \( c_d \;=\; \dfrac{ MRR }{ c_w \cdot f }\) \( c_w \;=\; \dfrac{ MRR }{ c_d \cdot f }\) \( f \;=\; \dfrac{ MRR }{ c_d \cdot c_w }\) |
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| Symbol | English | Metric |
| \( MRR \) = Material Memoval Rate | \(in^3\;/\;min\) | \(mm^3\;/\;min\) |
| \( c_d \) = Cut Depth | \(in\) | \(mm\) |
| \( c_w \) = Cut Width | \(in\) | \(mm\) |
| \( f \) = Feed Rate (IPM) | \(in\;/\;min\) | \(mm\;/\;min\) |
Material Removal Rate Formula |
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\( MRR \;=\; RPM \cdot c_d \cdot c_w \cdot IPT \cdot Z \) (Material Removal Rate) \( RPM \;=\; \dfrac{ MRR }{ c_d \cdot c_w \cdot IPT \cdot Z }\) \( c_d \;=\; \dfrac{ MRR }{ RPM \cdot c_w \cdot IPT \cdot Z }\) \( c_w \;=\; \dfrac{ MRR }{ RPM \cdot c_d \cdot IPT \cdot Z }\) \( IPT \;=\; \dfrac{ MRR }{ RPM \cdot c_d \cdot c_w \cdot Z }\) \( Z \;=\; \dfrac{ MRR }{ RPM \cdot c_d \cdot c_w \cdot IPT }\) |
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| Symbol | English | Metric |
| \( MRR \) = Material Removal Rate | \(in^3\;/\;min\) | \(mm^3\;/\;min\) |
| \(RPM \) = Revolutions per Minute | \(rev\;/\;min\) | \(rev\;/\;min\) |
| \( c_d \) = Cut Depth | \(in\) | \(mm\) |
| \( c_w \) = Cut Width | \(in\) | \(mm\) |
| \( IPT \) = Inches per Tooth | \(in\) | \(mm\) |
| \( Z \) = Number of Teeth on Cutter | \(dimensionless\) | \(dimensionless\) |
