Brazed gun drill
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Detailed introduction
In production, straight groove gun drills are used the most. According to the diameter of the gun drill and passing through the inner cooling hole of the transmission part, the shank and the cutter head, the gun drill can be made into two types: integral type and welded type. The coolant is sprayed from the small holes on the flank surface. The gun drill can have one or two circular cooling holes, or a single waist hole