Let the marine transmission using conical gears be called "Conical Drive Marine Transmissions". For these years, marine transmissions having high capacity have become an urgent need. To answer this need, it is necessary to increase both the tooth surface strength and the bending strength. And now, we invented a new type of concave conical gear, called "Hyper Conical Gear". That is to say, the Hyper Conical Gear is the having both the increased tooth surface strength and the increased bending strength. In this report, the design and production method of a pair of intersecting axis Hyper Conical Gears is presented. First, the relationship between the basic dimensions and the mounting dimensions of a pair of gears is obtained. Thus, the design procedure of a pair of intersecting axis Hyper Conical Gears is presented. Finally, test gear are designed and made for trial, the tooth bearing of the test gears measured and compared with analytical ones. And, it is proven that the design and production method of a pair of Hyper Conical Gears have the availability.
