This driveshaft is assembled with 316 stainless steel hardware and hubs. The Max HP at a 2.0 Service Factor is 90 at 1,800 RPM and 75 at 1,500 RPM The max DBSE (in.) is 94 at 1,800 RPM and 103 at 1,500 RPM. The Amarillo Gear Composite Drive Shaft for cooling towers reflects a long history of quality workmanship and reliability. Amarillo Gear has been designing and manufacturing power transmission products since 1934. The Amarillo Gear Composite Drive Shaft is the perfect complement to the Amarillo Right Angle Gear Drive. Each drive shaft connects the electric motor to the gearbox input shaft, thereby transmitting torque to rotate the cooling tower fan. Each drive shaft is specifically manufactured and engineered for the specific application to achieve optimum performance. The Amarillo Gear Composite Drive Shaft will accommodate spans ranging from 2 feet in small HVAC towers, to over 20 feet in large field erected towers. Amarillo Gear is proud to be a certified ISO 9001:2008 company. Design features and ratings of the Amarillo Gear Composite Drive Shafts are in accordance with, or exceed, the minimum requirements of AGMA (American Gear Manufacturers Association) standards.