Type SU / SD, High Speed Gears, are available in ratings up to 40,000 HP and output speeds up to 45,000 RPM or higher in ratios up to 9:1. Nuttall Gear's design features include heavy cast iron or welded steel housings for strength and rigidity, dynamically balanced precision double helical gears for uniform load distribution, and oversized split sleeve bearings with labyrinth oil seals to insure the reliability of this high speed unit. Millions of hours of operation have proven the design integrity of the Type SU / SD on typical applications such as pumps, fans, turbines and compressors. These high speed units can be supplied with an integrally mounted lube oil system including filter and cooler or with a remote lube oil console. Typical options might include oil temperature and pressure gauges or switches, bearing temperature detectors, vibration probes and turning gears. Type SU / SD High Speed Gears are available for AGMA 6011, API 613 / 677, and Class I-E Nuclear Safety Related Applications.