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  1. 04-09-2013 #3
    Jonathan's Avatar
    Lives in Leicester (Home) or Nottingham University (2nd Home), United Kingdom.
    Jonathan
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    9000rpm is far too fast for a 6mm cutter in mild steel. For things to be easy you'd want around 1000-2000rpm, but that's not happening with the spindle you have so just see how low you can set the speed without the spindle tooling.

    You'd also be better off using a cutter with more flutes, e.g. 3 or 4. Depending on the spindle speed you can use, you may need to use cutters with a special coating - e.g. the blue ones from cutwell tools.

    Quote Originally Posted by mekanik View Post
    Hi Dudz
    Try a look @ these SLOT DRILLS
    they are used for producing keyways
    Doesn't say if they're HSS or carbide? I'm guessing from the price that they're HSS. Carbide is definitely needed here due to the high spindle speed.
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