Title:
TWIST DRILL FOR CUTTING STAINLESS STEEL
Document Type and Number:
Japanese Patent JP2001341016
Kind Code:
A
Abstract:
To provide a twist drill for cutting stainless steel with excellent durability by adopting a tool profile of a sharper edge when drilling a comparatively ductile material to be cut such as stainless steel and adopting a shape without applying load to a drill main body in a high speed cutting of 25 m or more.
This coated cemented carbide stainless steel twist drill is constituted of a helix angle: 30 to 45° and a curvature of an edge groove bottom part continuous to a cutting face: 0.4 to 1.0 of a drill diameter and a groove width ratio: 50 to 70% in a cross section diagram perpendicular to the axis.
Inventors:
ONIZUKA TOKUHIDE
SHIMIZU TAKENORI
YOKOTA ISAO
SHIMIZU TAKENORI
YOKOTA ISAO
Application Number:
JP2001069803A
Publication Date:
December 11, 2001
Filing Date:
March 13, 2001
Export Citation:
Assignee:
HITACHI TOOL ENG
International Classes:
B23B51/00; (IPC1-7): B23B51/00