How to Calculate the Radius of a Milling Cutter

Milling cutters are very versatile pieces of machinery, capable of shaping wood or other materials in a variety of different ways. Not all attachments for a milling cutter have a definable radius, but knowing the radius of the attachments that do will help you better select the appropriate attachment. The radius of the attachment translates to the radius of the radius of the circular area it sweeps out.

Things You'll Need

• Milling cutter attachment to be measured
• Ruler

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Instructions

1. • 1

     Determine your units of measurement. There is no standard measurement unit, so whatever corresponds best with your project should be your selection.

   • 2

     Locate the inside edge of the hole in the attachment in which the milling cutter fits.

   • 3

     Locate the outside edge of the attachment. This extends to the edge of the teeth.

   • 4

     Measure from the inside edge to the outside edge with your ruler.