The profile data PFD represents the relationship between {HEAD ~ the angle} of revolution of {TAIL ~ the crank pin P} with respect to the machining start position and the position of the grinding wheel head 8 with respect to the axis of rotation of the crankshaft W, as determined, for example, every 0.5 degrees in the angle of rotation of the crankshaft W 
The profile data PFD represents the relationship between { HEAD ~ the angle } of revolution of { TAIL ~ the crank pin P } with respect to the machining start position and the position of the grinding wheel head 8 with respect to the axis of rotation of the crankshaft W , as determined , for example , every 0.5 degrees in the angle of rotation of the crankshaft W
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH