Crankshaft machining system and crankshaft machining method

A crankshaft machining system comprising:

• a center hole boring device configured to bore a center hole in each of both end surfaces of a crankshaft blank to obtain a post-centering crankshaft blank having a pair of center holes;
• a post-centering balance meter configured to measure a shape of the post-centering crankshaft blank with reference to the pair of center holes;
• a controller configured and arranged to control the post-centering balance meter;
• and
• a cutting device configured to cut a main journal and a pin journal of the post-centering crankshaft blank after the shape of the post-centering crankshaft blank has been measured,
• the controller being configured to control the post-centering balance meter to determine a principal axis of inertia on the basis of the measured shape of the post-centering crankshaft blank, the controller further being configured to transmit information indicating intersections between the principal axis of inertia and both end surfaces of the post-centering crankshaft blank to the center hole boring device prior to cutting of the main journal and the pin journal of the post-centering crankshaft blank, and
• the center hole boring device configured to bore a center hole in each of both end surfaces of another crankshaft blank to be loaded next on the basis of the information indicating the intersections.