|発明の名称||GRINDSTONE AND ITS MANUFACTURING METHOD|
PROBLEM TO BE SOLVED: To provide a grindstone capable of preventing a work to be processed from a burn or damage using inside the grindstone as a passage for flowing of the coolant or lubricant for the work to be processed, capable of exerting excellent permeability despite the same porosity by improving the arrangement of a pore forming agent or its shape.
SOLUTION: The grindstone 1 is formed in a disc shape from pore(s) 2 having a longer axis and shorter axis where sintering is made with the pore forming agent, abrasive grains 3, and a binder 4, wherein the pore forming agent is arranged so that its longer axis direction is identical to the rotational normal direction of the grindstone 1, followed by the sintering process.
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