Carbide drill

Details Carbide drill Carbide drill

1983-06-13

1986-10-14

Bilinsky, Z. R.

Cutting by use of rotating axially moving tool

Tool of specific diverse material

408145, 408205, 408230, B23B 5102

Patent

active

046169644

ABSTRACT:
At the top surface of a drill head, one or two tips are fixed radially with a little clearance from the axis of rotation, and thereby a nonmachining zone is formed around the axis of rotation. Each tip has its cutting edge formed projectingly from the radial line to a tangential direction and the distance from the axis of rotation to the cutting edge is made greater than the distance from the axis of rotation to an end face of the tip. The core which is generated and grows in the nonmachining zone in the course of machining is pressed by the end face of the tip and broken off, or is clamped between the end faces of the tips and wrenched off due to friction torque.

REFERENCES:
patent: 4373839 (1983-02-01), Negishi et al.

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