Patent ID: 7927389

Claim:
A superabrasive grain setting method for arranging in a grid pattern superabrasive grains on a mounting surface of a rotary shape manufacturing mold which is used in manufacturing a rotary grinding tool, the method comprising: a two-dimensionally developed coordinate preparation step of developing a non-cylindrical area of the mounting surface where a tangential line to the mounting surface in a plane including the axis of the manufacturing mold crosses with the axis of the manufacturing mold, into a circular-arc belt-like surface in the form of a plane and setting a plurality of mounting points on the circular-arc belt-like surface in the grid pattern in dependence on mounting positions for the superabrasive grains, wherein in predetermined angular ranges whose centers are at different positions in the circumferential direction of the circular-arc belt-like surface, consecutive mounting points in the grid pattern align in the circumferential direction of the circular-arc belt-like surface; a rectification step of rectifying the grid pattern of the mounting points in the predetermined angular ranges so that in each of the predetermined angular ranges, the consecutive mounting points in the grid pattern do not align in the circumferential direction of the circular-arc belt-like surface; and a mounting step for mounting the superabrasive grains on the mounting surface of the manufacturing mold based on the arrangement of the mounting points which are designated by the grid pattern rectified at the rectification step.