gpkull--
I ran my 5 HP lathe, 5HP bandsaw, 2HP surface grinder and and 3HP millng machine for 15 years on a 7 1/2HP 3 phase motor that I put a 4 inch 'flywheel' on and rope started it....wrap rope, pull rope, hit magnetic switch and the 'slave' motor was running. It would start and run all the machines *except* the lathe at the highest (1500) rpm setting.
I'm a one man shop and several times I ran a total of 10 HP with no smoke or chittlins.
(yes, I speak Southernese)