BORDO Universal Drill Set

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  Reduced Shank HSS

  BORDO Reduced Shank HSS 3/8″ Shank Fractional

  • Reduced shank HSS twist drill.
  • 118° notched point with 30° helix.
  • Notched point is a variation on the standard chisel point, providing faster starting and reduced drill wander.
  • 118° point angles are ideal for use in materials such as mild steel and cast iron.
  • The 118° point creates easily controlled chips which are wide and thin.
  • Bordo reduced shank HSS drills are ground and then a black finish is achieved by steam tempering, a thermal process resulting in a porous tool coating.
  • This surface aids chip flow and heat dissipation.
  • The drill is then ground a second time to achieve a bright finish on the shank and cutting edges.

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• 

  Long Reach (Aircraft) HSS

  BORDO Long Reach (Aircraft) HSS Fractional

  • Long Reach (Aircraft) Drill
  • Long Reach Drills are suitable for all general purpose drilling where extra reach is required.
  • Long Reach Drills are not designed to drill deep holes.
  • Maximum hole depth must be less than the flute length (FL) of the drill.
  • Deep hole drilling requires the use of a Bordo Long Series Drill, Bordo Extra Deep Hole Drill or Bordo Auger Bit depending on the material being drilled.
  • 135° Split Point (crankshaft point)
  • Split point is self centering reducing the need for end thrust.
  • The 135° point provides superior performance when drilling harder steel materials.
  • In most situations it will produce thicker chips minimising work hardening of the cavity.
  • Faster penetration reduces abrasion and friction along the cutting edges.
  • Black Finish Drills (also called blue finish) achieve their distinctive colour by steam tempering, a thermal process resulting in a porous tool coating.
  • This surface helps to keep lubricant on the tool, particularly important on the cutting edges, thus reducing friction and cold welding.
  • The result is increased tool life.
  • Black finish tools are generally recommended for ferrous applications where the oxide layer aids chip flow and heat dissipation.

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• 

  Long Series HSS

  BORDO Long Series Bright HSS Metric

  • ANSI B94-11
  • 118° split point with 30° helix.
  • Split point is self centering and reduces the need for end thrust. Friction at workpiece is reduced.
  • 118° point angles are ideal for use in materials such as mild steel and cast iron.
  • The 118° point creates easily controlled chips which are wide and thin.
  • Bright Finish Twist Drills have no surface treatment and are supplied in the as-ground condition.
  • These tools are suitable for general purpose use, particularly for non-ferrous applications.

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• 

  Colour Band

  BORDO Blue Band HSS-Co TiAlN Stainless Steel Drilling Metric

  • Bordo Metric Blue Band HSS-Co TiAlN Coated Twist Drills for Stainless Steel.
  • DIN338
  • Multi-faceted point with two helical flutes with 35 degrees of helix angle.
  • The machining of stainless steels is difficult due to its work hardening properties, toughness and poor thermal conductivity, which places high demands on the cutting tools.
  • The Blue Band – Stainless Steel – Series has been specifically designed to suit these difficult machining requirements.
  • TiAlN coating increases tool surface hardness to 87Rc.
  • For machining materials with Hardness < 350 HB : Tensile Strength <1250 N/mm2.

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