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  1. 13-01-2015 #27
    Neale's Avatar
    Lives in Plymouth, United Kingdom.
    Neale
    Last Activity: 2 Hours Ago Has been a member for 9-10 years. Has a total post count of 1,740. Received thanks 297 times, giving thanks to others 11 times.
    Quote Originally Posted by suesi34e View Post
    You say if that is done with a sharp tool it will produce a stress raiser, so is there a time when a blunt tool is better?
    No, it means use a sharp tool, but with a rounded tip rather than a sharp angle at the tip. That would leave a radius in the corner rather than a square corner, which is good from a stress-reduction point of view. Any sharp change in dimension concentrates the stress at that point. It's very seldom better to use a blunt tool for anything!
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