Feed rate in slab milling operation is equal to

The correct option is product of rpm, feed per tooth and number of teeth in the cutter.

In a slab milling operation (also known as peripheral milling), the cutter has multiple teeth (cutting edges) distributed along its circumference. To understand how the overall feed rate of the workpiece is calculated, we can break down the process into the following parameters:

Let:

$f_t$ be the feed per tooth (the distance the workpiece advances during the cut of a single tooth, measured in mm/tooth),
$z$ be the total number of teeth in the cutter (teeth/revolution), and
$N$ be the rotational speed of the cutter (measured in revolutions per minute or rpm).

First, we find the feed per revolution ($f_{\mathrm{rev}}$), which is the distance the workpiece advances for one complete rotation of the milling cutter. Since there are $z$ teeth on the cutter, this is given by:
$f_{\mathrm{rev}}=f_t\times z$

Next, to find the feed rate ($v_f$ or table feed speed in mm/min), we multiply the feed per revolution by the rotational speed $N$ (rpm):
$v_f=f_{\mathrm{rev}}\times N=N\times f_t\times z$

Therefore, the feed rate is the product of the cutter's rpm, the feed per tooth, and the total number of teeth in the cutter.