- For more than half a century, RILEY GEAR has been a defining force in the development of precision gears, splines and custom power transmission designs for a diversity of applications in various industries. Including: Aero Space & Defense Machine Tools Centrifugal & Turbo Compressors Transportation Components Pump Gears & Robotics For more information email us at: info@rileygear.com ...www.rileygear.com