English to Spanish Tech/Engineering Mechanics / Mech Engineering Grinding crankshaft

Definition of "Journal" according to my client: machine which grinds crankshaft

SW translation, no context provided. Strings for reference:
Journal grind pattern
Journal compensation factor
Journal traverse* pos (which I think means "transverse")

Could we translate "journal" as "mandril"? Currently it is translated as "cojinete", but I am not sure of it.

Please advise. Thanks a million in advance.