6 Piece Screw Extractor Set | Sizes 1-6
- Reverse Tapered Cutting Screw Thread
- Square Head for use with Tapping Handles
- 6 Common sizes available
- Suits pilot drill: 2.0mm, 5/64"??
- Suits bold thread diameter: 4.0-4.5mm, 5/32-3/16"??
Directions for use:??
If possible, grind or flatten the head of the damaged bolt or screw.
With a heavy hammer and centre punch, mark the centre of the bolt or screw; this will prevent the pilot drill wandering.
The extractor requires a pilot hole, start with a small Alpha left handed drill bit (e.g. 5/64??????????).
If required, drill the hole out larger. It is best to use a left-hand drill for this step, as this may be enough to remove the stud without a screw extractor.
Select the correct size screw extractor for the hole, see table above.
With a tap wrench, turn the screw extractor into the hole in an anti-clockwise direction. The reverse threads force the extractor into the hole until the broken bolt or stud is forced to turn. Continue turning until the stud is removed.