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October 13, 2022
L/D=30 ~## 100, which belongs to special deep hole. It must be processed on a deep hole drilling machine or special equipment using a deep hole drill.
Although deep hole drilling is a cutting process, it is different from traditional cutting. In practice, it is found that when traditional cutting is processing, multiple tools work at the same time, and the torque of each process is different. In the early stage of deep hole drilling, as soon as the drill bit contacts the workpiece, the pressure will reach about 2000N, and the temperature will increase instantaneously. The pressure is about 4000N. If the extreme pressure value (PD) of the selected oil is lower than 4000N or the release speed of the extreme pressure agent in the oil is slow, then smoke and rapid wear of the drill bit are inevitable.
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