SD / SW Series Maximum Performance SWISS Turning Centers Max. Machining Diameter : Ø 16 / 20 / 32 / 42 mm MAx. Turning Length Per Chuck : 175 / 207 / 315 / 110 mm Main Spindle Speed : 10,000 / 10,000 / 7,000 / 6,000 rpm Main Spindle Motor ( Cont. / 30 min. ) : 2.2 / 3.7 ; 5.5 / 7.5 kW Sub-Spindle Motor ( Cont. / 30 min. ) : 0.55 / 1.1 ; 1.5 / 2.2 ; 2.2 / 3.7 ; 3.7 / 5.5 kW