The book "Calculation of mechanical transmissions of the NGO" by the authors Obischenko L. N. and Korotaeva T. P. is an indispensable resource for anyone interested in mechanics, engineering and design in the field of power transmission This publication not only immerses the reader in the theoretical foundations of the calculation of mechanical transmissions, but also offers practical recommendations that will help in the development of effective and reliable drive systems. The book explores key aspects of mechanical gear design, including material selection, load calculation, and determining optimal parameters for different types of gears. The authors pay special attention to modern methods of calculation, which makes the material relevant for students of technical universities, practical engineers and anyone who seeks to deepen their knowledge in the field of mechanics. Interestingly, the book contains many examples and tasks, which allows the reader not only to learn the theory, but also to apply it in practice. Who can like this edition? First of all, it will be useful for students and graduate students studying in specialties related to mechanical engineering, mechanics and automation . Engineers and designers working in the field of design and operation of mechanical systems will also find in the book many useful tips and recommendations. In addition, this publication will be of interest to everyone who is fond of technical sciences and wants to expand their knowledge of mechanical transmissions. The topics raised in the book cover a wide range of issues related to the design and calculation of mechanical systems. The authors emphasize the importance of accuracy of calculations and the choice of the right materials, which is critical for ensuring the reliability and durability of drives. They also discuss current trends in mechanics and new technologies that can be used to improve the design of mechanical gears. This makes the book relevant not only for learning the basics, but also for understanding modern approaches and innovations in this field. The style of the authors is distinguished by clarity and accessibility of presentation, which allows the reader to easily assimilate complex technical concepts. Obischenko L. N. and Korotayev T. P. Experienced professionals who not only have deep knowledge in their field, but also know how to share it with others Their previous work also deserves attention, as they cover various aspects of mechanics and design, which confirms the high level of their expertise. If you are looking for a book that will help you understand the calculations of mechanical gears and give practical advice on design, “Calculation of mechanical gear drives NGOs” will be an excellent choice. This publication will not only enrich your knowledge, but also inspire new ideas and solutions in your professional activities. Do not miss the opportunity to get acquainted with this unique book, which will become your reliable assistant in the world of mechanics and engineering.