- Reverse Tapered Cutting Screw Thread
- Square Head for use with Tapping Handles
- 6 Common sizes available
Technical data:
- Suits pilot drill: 7.5mm, 19/64″
- Suits bold thread diameter: 14 - 20mm, 9/16 - 3/4″
Directions for use:
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If possible, grind or flatten the head of the damaged bolt or screw.
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With a heavy hammer and centre punch, mark the centre of the bolt or screw; this will prevent the pilot drill wandering.
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The extractor requires a pilot hole, start with a small Alpha left handed drill bit (e.g. 5/64’’).
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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.
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Select the correct size screw extractor for the hole, see table above.
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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.
| Minimum Sale Qty: | 1 |
