A four-edged cutter is not brain power, but it is of great practical importance, as it doubles the cutting speed per minute compared to a traditional double-edged cutter, regardless of the speed of the cutter or used. Other benefits include reduced vibration, a smoother finish and presumably a longer lasting cutting edge as each edge creates less extra "biting" which should also result in a lower temperature of the carbide edge which indirectly also increases pilot bearing life as this is the Case should be less thermal migration. to the ball/ring/bearing lubricating assembly. . . A win-win situation.
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