TABLE OF CONTENTS Countersink tools are discussed in detail in the following paragraphs of this chapter. They are presented in numerical sequence of style number. A generic name is generally applied to each style tool, although the data provided for many are for the tools of a specific company. The data for other company's cutters will typically be in the same range of dimensions, but readers should contact specific companies for the dimensions of their tools. The data here are representative, but not necessarily accurate for all manufacturers of the same style.
Single piece or solid cutters are generally discussed first, followed by deburring cutters (that countersink), rotary burs, back countersinks, and tools using throw away inserts. Diamond-coated tools or special approaches are presented last.
Information for single-flute traditional cutters is given first. A few readers will recognize that the elliptical cutter geometry defined in style #25 is often called a zero-flute countersink. The author has not used this naming convention.
The single-flute style is designed for general purpose countersinking, chamfering, and deburring (Fig. 3-7). The carbide design is used to countersink abrasive non-metallic and nonferrous metals, as well as mild steels; it is not suited to hardened steels. A special high alloy tool material is used for cutting stainless steel and high temperature alloys. It typically comes in 60 , 82 and 90 included angles. High-speed steel (HSS) versions are also available in 100 and 120 angles. When used appropriately this design produces...
