Department Ontology The milling machine Spindle is made of CHROME MOLYBEDENUM STEEL, tempering and carburizing heat trea Department of Ontology 5HPBSpindle is made of CHROME MOLYBEDENUM STEEL, tempering and carburizing heat treated. Precision ground.Spindle assembled precision bearing that offers wide cutting range and high accuracy.Unique inversion type milling head, High precision, easy ...