Austsaw - 185Mm (7In) Diamond Blade Super Turbo Wave - 22.2/20Mm Bore - Super Turbo

Product Description

Reverse Tapered Cutting Screw Thread Square Head for use with Tapping Handles 5 Common sizes available Technical data:  Suits pilot drill: 4.0mm, 5/32"  Suits bold thread diameter: 8mm, 5/16"  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.