Insert-exchangeable, rotary tool and throwaway insert

Details Insert-exchangeable, rotary tool and throwaway insert Insert-exchangeable, rotary tool and throwaway insert

2005-04-26

2005-04-26

Fridie, Jr., Willmon (Department: 3722)

Cutters, for shaping

Rotary cutting tool

Including holder having seat for inserted tool

C407S113000

Reexamination Certificate

active

06884006

ABSTRACT:
An insert-exchangeable, rotary tool to which throwaway inserts are detachably attached, the insert comprising substantially square-shaped face and bottom surface and an outward curved flank on each side surface, and having a positive-type shape in which an outward curved edge line formed by the face and the flank serves as a cutting edge; each flank having in a substantially center portion a flat surface portion extending to the bottom surface without contacting with the cutting edge; a major cutting edge formed by the outward curved edge line circularly extending from its lowermost point toward a periphery of the tool when the insert is attached to the insert-exchangeable, rotary tool, such that it has a negative radial rake; and the lowermost point being positioned inward a center of the outward curved major cutting edge.

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European Search Report for EP 02 25 3716 dated Aug. 8, 2002.

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