1. Yesterday I needed a flat bottomed hole 12mm OD 30mm deep in a Delrin part.

    Having chucked the part I was looking for a drill to pilot for boring and noticed a 6mm single flute end mill in a 10mm straight shank collet chuck, so I bunged it in the tailstock chuck and drilled the hole.

    As I dropped the boring bar holder onto the QCTP a series of thoughts converged - the boring bar holder has 6mm and 10mm holes, the single flute endmill is in a 10mm shank holder, the single flute edge looks a bit like the tip of a boring cutter when set horizontal.

    Sure enough it's a great plunge-drilling and boring cutter in one for plastics!

    - Nick
    Last edited by magicniner; 15-05-2016 at 01:56 PM.
    If you will not be swayed by logic or experience simply pick the idea you
    like best, but ask yourself why you sought advice in the first place and,
    for a simple life, perhaps consider not doing so in future

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