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  1. 17-11-2009 #8
    HankMcSpank's Avatar
    Lives in London, United Kingdom.
    HankMcSpank
    Last Activity: 10-06-2024 Has been a member for 9-10 years. Has a total post count of 623. Received thanks 10 times, giving thanks to others 59 times.
    Quote Originally Posted by Kn8 View Post
    Hi The square end on my M4 taps is 3.10mm the hex drive for most standard srewdriver bits is 1/4". I could if it would help spark a 3.1mm square hole in the end of an old driver bit if it would solve your problem.
    Regards
    Ivan.

    Ivan,

    That's a very kind offer. I've got home & measured mine - it's 3.8mm. I've being a little bit slow here - ie taps have different sized ends!

    Rather than put you out I think I'll go with that little hex shaft chuck I linked to ...I reckon It'll get some use around my workshop anyway. (that said, I'd love to know how you 'spark' a square hole in the end of a bit though!).

    Many thanks.
    Last edited by HankMcSpank; 17-11-2009 at 08:42 PM.
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