Operating diamond grits to produce a precise grind tool is need. In order lift up grit by magnetic force, the flux was estimated be 100 μT/g. Diamond (110) surface modified with manganese powder at 450°C (720 K) then bismuth 270°C (540 due its low melting temperature. Manganese carbides were formed on which confirmed an X-ray diffraction. A magnet that exhibits ferrimagnetism surface, it had sp...