Feed rateformula for milling

Cutting speed formula

Cutting speed (when turning) is the peripheral speed of the work and the amount of insert movement in metres per minute. (π x Dm) of the formula below is the periphery of the work. The periphery x n (RPM) is millimeters the cutting edge moves on the periphery of the work in a minute. It is usually expressed in m/min. Divide by 1,000 to change to m from mm.

Feedper tooth formula

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Feed rateformula for turning

As shown in the formula below, feed is ℓ (cutting length per minute) ÷n (main axis spindle speed). (Cutting length per minute) ÷ (RPM) is the movement of the cutting edge during one work rotation.

When machining a 10 mm diameter shaft, lets says a 100 mm length is machined in 1 minute, at 1,000 RPM. This means that the cutting length per minute is 100 mm/min.

When tools and dies remain in operation without replacement due to wear, our customers realize less machine downtime, operator idle time, and expense of new or resharpened tools and dies. The end result is far greater productivity and lower costs.