ORIGINAL: BMatthews
Sorry Old Git, but for small sizes like we're talking here on this project and in aluminium high speed is what you want to encourage the chips to clear better. But I'll agree on the coolant/cutting fluid recomendation.
Bruce, you're quite right, I wasn't paying proper attention. Personally, I can't sharpen small drills any more. (thinks, "not so good with big ones either!")
I have seen a drawing of a Spark Erosion machine for home construction but that becomes rather more like model engineering.
old git - - - - aka John L.