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BORDO HSS Centre Drill

  • Bright Finish HSS No.1 Centre Drill 118° / 60°
  • Centre Drills are used with a lathe to centre drill stock for mounting in the lathe.
  • They are designed to drill a small diameter pilot hole followed by a 60° countersink which provides a bearing surface for the 60° point of the lathe centre.
  • Centre drills are also used extensively with milling machines to accurately start holes.
  • The hole locations can be dialled in using the milling machine’s calibrated hand wheels.
  • The hole is then started using the centre drill.
  • The large diameter shank on the centre drill holds the drill point right on centre.
  • Once the hole is started, the centre drill is replaced with a drill of the desired diameter and the finished hole is then drilled.

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Additional information

Size

No. 1, No. 2, No. 3, No. 4, No. 5, No. 6, No. 7, No. 8

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