Special inner hole cutter bar for lathe cutter table

The utility model relates to the technical field of inner hole cutter bars, and discloses a special inner hole cutter bar for a lathe cutter table, which comprises a cutter bar, a square hole is arranged on the front side of the left end inside the cutter bar, the square hole and the cutter bar are integrally formed, an outer circle cutter bar is arranged inside the square hole, and a cutter point of the outer circle cutter bar is 1mm higher than the center of a workpiece. By changing the diameter and the length of the cutter bar, the problems that an existing cutter bar vibrates during machining, and machining cannot be carried out due to the fact that the depth of a machined hole exceeds the maximum length capable of being machined by a general cutter bar are solved. 本实用新型涉及内孔刀杆技术领域，且公开了一种车床刀台用的专用内孔刀杆，包括刀杆，所述刀杆内部左端的前侧设置有方孔，且方孔与刀杆一体成型，所述方孔的内部安装有外圆刀杆，所述外圆刀杆的刀尖比工件中心高出1mm。该实用新型通过对刀杆的直径和长度改变，解决了现有刀杆加工时发生振动，以及加工孔深超过通用刀杆能加工的最大长度而无法加工的问题。