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  1. #11
    therefore maybe something like these at the right speed...

    Dremel Brad Point Drill Bit Set - 631 | eBay (they go up to 1/4")

    never used them for tin, but they work great on acrylic! (& handy to have in your arsenal of bits - especially if your machine is confined/restricted to a 1/8" collet, such as a rotary tool in this arrangment -
    Last edited by HankMcSpank; 28-06-2013 at 09:16 AM.

  2. #12
    I want to avoid drilling if I can , I want a sort of high bred clamp come punch template combo , ill work on it and see what I can do, thanks for the replies guys :)

    Fiction is far more plausible when wrapped around a thread of truth

    Nothing great was ever achieved without enthusiasm.
    Ralph Waldo Emerson

  3. #13
    m_c's Avatar
    Lives in East Lothian, United Kingdom. Current Activity: Viewing Has been a member for 9-10 years. Has a total post count of 2,033. Received thanks 223 times, giving thanks to others 5 times.
    Last edited by m_c; 20-05-2014 at 09:58 PM.

  4. #14
    Hi Fivetide
    regarding die press, a decent pillar drill should provide enough pressure for punching thin stuff,clamp your die to the table (simples)

  5. #15
    What about this sort of punch press?
    eBay item no.

  6. #16
    Whitney punch
    Ebay 221245161892

  7. #17
    You'd probably get a decent hole if they were drilled with a milling slot drill. Probably a nice job for a CNC. Unless you fancy building a CNC punching machine...

  8. #18
    Rotabroach annular cutter (aka mag drill cutter) often does a good job on sheet too... but you'd probably need a mill to hold the shank (fits nicely in a 19 mm ER32 collet). Sizes go down to 12 mm in standard series, never tried the 'mini' ones.
    ah just seen it's a 1/4 inch hole so as you were...
    Last edited by bikepete; 30-06-2013 at 09:10 PM.

  9. #19
    All great ideas but I have to be quite accurate with the holes, after marking them out then drilling chances are they won’t be that accurate. The PCB has about 5 mounted parts that need to go through the holes on different sides and there’s no play. Plus they have to be neat. So that’s why Im thinking of making a template I can slip over the edge of the tin box, sort of an inverted U shape and then using a hardened bolt that’s been cut down with a cutting edge done on a lathe that then screws through the die and punches out the holes.

    Fiction is far more plausible when wrapped around a thread of truth

    Nothing great was ever achieved without enthusiasm.
    Ralph Waldo Emerson

  10. #20
    A bit like these:-
    Q.max Sheet Metal Hole Punch 25mm
    But I don't think they are made down to 5mm. ...Clive

  11. The Following User Says Thank You to Clive S For This Useful Post:

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