How To Calculate The Effective Diameter for a Toroid Type Cutter

When cutting less than full depth with a toroid shaped cutter, the effective cutting diameter is smaller than the actual diameter of the cutter, and dependent on the depth of cut and the corner radius. This effective cutting diameter is used for feed and speed calculations. A toroid shaped cutter is a flat bottom cutter with corner a radius that is less than half of the cutter diameter.

The formula used to calculate the effective cutting diameter is as follows:

Effective cutter diameter = 2 * (((R ^ 2) - ((R - Depth) ^ 2)) ^ 0.5) + (D - 2 * R)

where;

Depth = the depth of cut

D = the cutter diameter

R = the corner radii

In the DZynSource Mold Engineering Software, you enter the cutter diameter, the corner radii, and the depth of cut in the appropriate text boxes,  Press Calculate, and the answer appears above the Calculate button.

Use the Clear button to clear all fields, however this is not necessary in order to do another calculation. You may simply type over the previous entries.

You may send the page to your default printer by pressing Print.

Press Menu to return to the main menu of DZynSource Mold Engineering Software.