Rotary cutting tool with offset cutting element

Details Rotary cutting tool with offset cutting element Rotary cutting tool with offset cutting element

1978-05-17

1980-08-19

Weidenfeld, Gil

Cutting by use of rotating axially moving tool

Tool-support with means to permit positioning of the tool...

Including central-lead

408201, B23B 2700

Patent

active

042181631

ABSTRACT:
A cutting tool includes a shank with one end adapted to be secured to a rotary chuck. Spaced inwardly from an opposite end is a transversely extending radially offset aperture extending through the shank for receiving a cutting tool. A threaded aperture extends into the shank axially from the opposite end for receiving a set screw for securing the cutting tool within the offset aperture. A cup-shaped pilot bushing is provided and fits over the opposite end of the shank and includes means interengaging the cutting tool and an aperture aligned with the threaded aperture of the shank so that the bushing can be interlockably secured to the shank. In some embodiments, the leading edges of the shank and the pilot bushings are chamfered and knurled to define a ream for use of the cutting tool with out-of-round and/or undersized pilot holes. A cutting tool so formed can be employed as a universal drill for enlarging pilot holes within an infinitely adjustable range of sizes.

REFERENCES:
patent: 2811054 (1957-10-01), Townsend
patent: 2937545 (1960-05-01), Rauer et al.
patent: 3358531 (1967-12-01), Schaffler

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