540 RPM or 1,000RPM It has three base mounted 250 HP spindle gearboxes. One base mounted 275 HP divider box. Series 6;80-degree constant velocity main drive shaft, with Series 8 intermediate and wing driveshafts. Also, it has a 7″ blade overlap for better cutting. Blade tip speed: 16,750 FPM.10 Gauge Material. 1/2″ frame skeleton deck for strength and weight savings. Smooth top design for easy cleaning.