Patent ID: 6408838
Filing Date: 2002-06-25
Classification: B23D,B24D,B28D

Abstract:
A rotary cutting saw to be used in an operation for forming a groove in a work material, comprising:a base disk; and a plurality of abrasive segments which are bonded to an outer circumferential surface of said base disk so as to be spaced apart from each other in a circumferential direction of said base disk; wherein said base disk has a plurality of slits for catching therein cutting chips produced during said operation, said plurality of slits being formed in said outer circumferential surface of said base disk so as to be located between adjacent ones of said abrasive segments in said circumferential direction, each of said plurality of slits extending inwardly in a radial direction of said base disk from said outer circumferential surface of said base disk, and extending in an axial direction of said base disk over an entire axial length of said base disk; wherein each of said slits is defined by a pair of side surfaces opposed to each other in said circumferential direction, and a part-cylindrical surface defining a part of a cylinder having an axis which is parallel to said axial direction, said side surfaces being connected at radially inner end portions thereof to said part-cylindrical surface; wherein said part-cylindrical surface has a width as measured in said circumferential direction, which width is larger than a circumferential distance between said radially inner end portions of said side surfaces; wherein said part-cylindrical surface is smoothly connected to one of said side surfaces without a stepped portion therebetween; and wherein said one of said side surfaces of each of said slits is located on a forward side of the other of said side surfaces as viewed in a rotating direction of said base disk.