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Screw Extractors and Left Hand Drills

 

  • Chrome alloy spiral screw extractor.
  • Coarse-pitched tapered screw thread.
  • Spiral flute screw extractors are ideally suited for removing broken bolts, studs & socket screws from medium to hard metals.
  • Typically the required screw extractor will be approx. 2/3 the diameter of the fixing you are extracting.
  • Use a centre punch to mark the centre of the fixing before drilling to prevent the drill bit wandering.
  • Select a drill bit that is suitable for drilling into the specific material - typically HSS or HSS-Co5. Ideally the drill should be Left Hand" which will prevent further tightening of the fixing during drilling.
  • When using left hand drills ENSURE THE DRILL IS SET TO REVERSE.
  • Drill pilot hole in centre of broken bolt, screw or stud.
  • Lightly tap screw extractor into hole and turn anti-clockwise with a tap wrench or spanner.
  • Damaged bolt, screw or stud will unwind out of the hole.
  • Avoid excessive lateral loads - breakage could result.
  • Wear eye and hearing protection

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