A combination grinding machine 8, wherein the workpiece support mechanism comprises {HEAD ~ a supporting drive unit} configured to rotate a crankshaft about {TAIL ~ a journal axis} to thereby revolve a plurality of crank pins around the journal axis, and 
A combination grinding machine 8 , wherein the workpiece support mechanism comprises { HEAD ~ a supporting drive unit } configured to rotate a crankshaft about { TAIL ~ a journal axis } to thereby revolve a plurality of crank pins around the journal axis , and
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH