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Old 01-04-2002, 03:57 AM
Neil Eglintine
Posts: n/a
Drill sizes

Don't try a large size straight away. Start small, which will help you centre on the bolt itself. Then increase the drill size in steps till you drop the head off. Dont rush this, new flywheels and cranks cost a lot!

The damage to the bolt heads sounds like they were over tightened and suffered fatigue.
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