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Choice of Abrasive: CBN (Cubic Boron Nitride) is a kind of synthetic supper-hard materials, the second hardest material in the world. Its hardness only inferior to the synthetic Diamond.Generally speaking, more coarse grain size brings higher grinding efficiency, while the surface finishing degree would be relatively lower, and vice versa.
To sharpen the Log Saw Blades, FEPA standard grain size B107(same as ISO standard 140/170#) would be the most suitable choice this grain size has been proved to be the perfect match for Log Saw Blades after a long-time explorations & practical experience. And Grain Size D107 refers that the same size but diamond abrasive.
