it was just really a bit of an exercise really, hopefully it could skim a small head on my harrison milling machine at some time in a pinch, not finished yet
it will use both 5/16 a nd 1/4 tool steel bits and some indexable lathe tooling I have also, the shaft is an interference fit in the tool, the external part was heated in an oven to 250 deg and the shaft was placed in the freezer for a few hours and the two pressed together and secured with a 1/4 bolt!
so the tool diameter is 5 3/4 '' and my book says that with a carbide tool I can cut steel at 200 feet / min , my machines slowest vertical speed seems to be 123 rpm so 200x12/3.14x 5.75 =133 ish
i guess that makes it a go? i did try it on aluminum and it was fine apart from needing a real slow feed, any thoughts? im just plotting the best way of securing the tool bit now so the result may see the cutter diameter reduced as a consequence of a clamp plate recessed into the tool.