Drilling and threading tool and method for drilling and threadin

Details Drilling and threading tool and method for drilling and threadin Drilling and threading tool and method for drilling and threadin

1988-02-05

1989-05-23

Bilinsky, Z. R.

Cutting by use of rotating axially moving tool

Tool or tool with support

Having inversely angled cutting edge

10141R, 408222, 409 74, B23G 520

Patent

active

048316741

ABSTRACT:
A combined drilling and threading tool comprises a shank having a conical front portion defined by hole-cutting edges, and spirally curved ribs disposed rearwardly of the edges. A row of thread-cutting teeth is disposed along the leading edge of each rib. Each tooth includes a thread-cutting edge facing in the direction of tool rotation, and a side surface extending away from the direction of rotation. The side surface is shaped to produce axial and radial clearance relative to the thread being cut. Each tooth terminates at a location intermediate the leading and trailing edges of its associated rib.

REFERENCES:
patent: 4651374 (1987-03-01), Turchan

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