Cutting Speed

Cutting speed is the rate at which the cutting tool passes over the material being machined, typically measured in surface feet per minute (SFM) or meters per minute (m/min).  It represents the speed at the outer edge of the rotating tool or workpiece relative to the material being cut.  Cutting speed is a factor in determining the efficiency and quality of machining processes, such as turning, milling, or drilling.

The ideal cutting speed depends on factors like the material of both the workpiece and the cutting tool, as well as the type of machining operation.  A higher cutting speed generally increases productivity but can lead to quicker tool wear or damage, while a lower speed can improve tool life but may reduce productivity.  Proper cutting speed selection is important to balance cutting efficiency, surface finish quality, and tool longevity.

 

Cutting Speed formula
\( CS \;=\;  \pi \; CD \; n \;/\; 12  \)     (Cutting Speed) \( CD \;=\;  12 \; CS \;/\; \pi \; n  \) \( n \;=\;  12 \; CS \;/\; \pi \; CD \)
Symbol	English	Metric
\( CS \) = Cutting Speed	\(in\;/\;min\)	-
\( \pi \) = Pi	\(3.141 592 653 ...\)	-
\(CD\)  = Cutting OD at Cutting Depth	\(in\)	-
\(n\)  =  Machine Efficiency	\(dimensionless\)	-

 

Cutting Speed formula
\( CS \;=\;  \pi \; CD \; n \;/\; 1000  \)     (Cutting Speed) \( CD \;=\;  1000 \; CS \;/\; \pi \; n  \) \( n \;=\;  1000 \; CS \;/\; \pi \; CD \)
Symbol	English	Metric
\( CS \) = Cutting Speed	-	\(mm\;/\;min\)
\( \pi \) = Pi	-	\(3.141 592 653 ...\)
\(CD\)  = Cutting OD at Cutting Depth	-	\(mm\)
\(n\)  =  Machine Efficiency	-	\(dimensionless\)