Excel Gear has completed manufacturing on a pair of strong but lightweight gears for research and development to an undisclosed aviation company. The gears were 3D printed using Maraging 350 alloy and subsequently vacuum heat treated. The bearing diameters were then ground before tooth grinding from solid in a Hofler Rapid 1500. The gears were ground to an AGMA 14 before being returned for a proprietary thermal spray coating process. The gears are scheduled to be tested in early 2019.