Countersink assembly

Claim 1

A countersink assembly comprising: a. a cutting tool having a cylindrically shaped external surface and including two countersink cutting elements having a semicircular shaped internal axial track, b. said cutting elements being adapted to enclose a spiral drill member at a location intermediate the ends of the drill member, c. said cutting elements including a cutting edge structure adapted to engage the space between the cutting spirals of the drill member so that the ingress of swarf is prevented during the countersinking of a hole formed by the drill member, d. a swarf diverter member attached to one cutting element and extending to an adjacent cutting element, e. each said cutting element including an internal wall adjacent said swarf diverter Member to form a swarf diverting canal, f. said external surface of the tool including a top portion having an inclined surface and a bottom portion having an inclined surface, and g. a tightening mechanism having a top cover section with a central opening therein and a bottom case section, h. said cover and case sections having internal inclined surfaces which mate with the external inclined surfaces of the cutting tool and being adapted to fit together and be securely tightened with respect to each other, i. whereby, when the top cover section and the bottom case section are forced together, the cutting elements are tightly forced against the drill member thereby fixing the position of the countersink assembly at said intermediate location so that the ends of the drill member project outwardly from the countersink assembly.