Bordo Cobalt TiAlN Coated White Band Jobber Drill Bit

• Bordo Metric White Band HSS-Co TiAlN Coated Twist Drills for Cast Iron.
• DIN338.
• 118° / 70° DX point with two helical flutes with 33 degrees of helix angle.
• A highly abrasive material with damping and thermal conductivity, high strength and resistance to wear. Cast Iron is used extensively for mass-produced components.
• The White Band Series is designed for this specific purpose. TiAlN coating increases tool surface hardness to 87Rc.
• For machining materials with Hardness < 300 HB: Tensile Strength <10900 N/mm².

About DX Point

• The double angled DX Point (118°/70°) minimises wear on the outer corners of the drill point in highly abrasive materials such as Cast Iron and Reinforced Plastics.
• The point is web thinned to enable easier penetration.

About Drill Bit Surface Treatment

• Violet / Grey TiAlN (Titanium Aluminium Nitride - TiAlN) A violet/grey finish with a higher hardness than both TiN and TiCN coating utilises aluminium in the coating which imparts greater oxidation stability.
• This stability is a result of a very thin film (of Aluminium Oxide) which is formed on the surface of the TiAlN.
• This film is self-repairing which leads to increased tool service life.
  This high-performance coating is able to withstand much higher temperatures which allows increased speeds and feeds and semi-dry machining operations.
• TiAlN coating is especially useful when machining cast iron and tough steels.