Hollow Drill Bit hman dan tur principle

Hollow drill bit principle chu hollow center-ah hian cutting fluid dah belh theih a ni. He fluid hian coolant leh lubricant angin hna a thawk a, friction leh wear a ti tlem a, cutting process a awlsam zawk nan. Chubakah, hollow structure hian machining laiin chip lo chhuakte chu a hun taka lakchhuah theihna a siam a, machining quality-a nghawng a neih tlem phah bawk.