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Step Drill Bits

7mm Tungsten drill bit for hardened steel HRC45-50 TiAlN coated combine drill bit

Brand name: ZLY®
Cutter type：step drill, tungsten drill bit, carbide drill, combine drill bit, multi function drill
No. of flutes: 2 Flutes
material：micro grain solid carbide
Coating：with TiAlN coating
Helix angle：right hand spiral 30deg
Specification: Diameter 7.2 x Cutting length 15 x dia 8.２x 21 x Shank Dia 7.0 x Total length 60L
Workpiece material: For steel, stainless steel, hardened steel HRC45-50, cast iron etc
Application：Drilling & chamfering
    Customized carbide drill tungsten drill bit

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