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Common Accidents Of Drill Bit Damage, And Its Analysis, Very Valuable

1、Hammer head fracture Hammer head fracture location mostly occurs in the hammer head spline upper reducer. Common causes of hammer head fracture are. (1) poor quality of the hammer head body itself, stress concentration, fatigue resistance, shear strength is low. (2) excessive drilling pressure leads to bending and vibration of the drilling tool, or uneven

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