Im trying ti machine a cup die out of 1018 steel, normally this would be done on a lathe but i would like to try to do it on a mill. its pretty much just a pocket thats round at the base, 5in. in dia 6 in. deep. I figure machining this part would be simular to mold making. What type of tools are generally used for simple molds? I know master cam has a lollipop endmill but ive not yat been able to find one, are ball endmills my only choice?