CNC Crankshaft Crank pin Grinding machine NAXOSUNION KHSA 1500 CNC Control SIEMENS Primo SG: Used 1984. Sweden Guax AB: Contact Seller. ... Crank Shaft grinding is the cylindrical grinding of the crank pin or bearing by plunge ... Used on following machines: Landis, Riat, Norton, Naxos Union, Newall ...