High-efficient fully ground drill bits with a very strong core, enlarged flutes profile with drill bit rigidity maintenance, are recommended for deep hole drilling by means of jig bushes into alloyed steel components, or cast steel with a tensile strength up to 900 N/mm2. It is important to modify the recommended cutting conditions regarding the insufficient supply of the cutting fluid.
High-efficient fully ground drill bits with a very strong core suitable for alloyed steel components, or cast steel with a tensile strength up to 900 N/mm2.
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