Copyright: © the author(s), This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited 427 Reviewing Surface Quality of Finish Hobbed Gears : Characteristics and Insights Govind Shantaram Dhage 1, 2, 4 *, Dr Ramkisan Pawar 3 , Jotiba Patil 5 1 Department of Science and Technology, Dr. Babasaheb Ambedkar Marathwada University, Chhatrapati Sambhajinagar, Maharashtra, India 2 Department of Mechanical Engineering, Maharashtra Institute of Technology, Chhatrapati Sambhajinagar, Maharashtra, India 3 Padmabhooshan Vasantdada Patil Institute of Technology, Bavdhan, Pune, India 4 Department of Mechanical Engineering, Hi-Tech Institute of Technology, Chhatrapati Sambhajinagar, Maharashtra, India 5 Sarvesh Engineering, K-154/155, MIDC Waluj, Chhatrapati Sambhajinagar, Maharashtra, India *Corresponding Author: govinddhage029@gmail.com ABSTRACT Gear manufacturing techniques play a vital part in the manufacturing industry for power and motion transmission. Power transmission efficiency depends on achieving error-free gears with ideal surface properties. Analysing total deviations from the intended design during production is necessary to evaluate the quality of machined gears. The optimization of process parameters has been found to improve gear hobbing, leading to enhanced quality. Numerous studies on a variety of elements, including cutting tools, cutting fluids, cutting parameters, and workpiece parameters, have been carried out to enhance the quality of hobbed gears. Recent studies have shown that applying cryogenic treatment and coatings to hob cutters can enhance gear hobbing performance. This paper summarizes the previous studies conducted on gear hobbing machines, which have focused on enhancing productivity by increasing cutting rates and prolonging tool life. The assessment of gear accuracy and quality primarily relies on microgeometric deviations, with commonly used criteria set by American Gear Manufacturing Association, Deutsches Institut für Normung , and Japanese Industrial Standards. Overall, the purpose of this study is to give an extensive overview of earlier studies on gear hobbing, with a focus on their importance of surface characteristics and the methodologies employed to improve gear quality, accuracy, and productivity. Key words- Gear hobbing, CNC Finish hobbing, Gear Quality, microgeometry deviations, Surface Roughness. Abbreviations: Rz- Mean Relative Surface Roughness ZR - Roughness factor σHP - Permissible Contact Stresses ZL-Lubrication factor ZNT-Life factor for contact stresses Zv- Speed factor ZW-Hardness Ratio factor ZX-Size factor for contact stresses SHmin- Safety factor for contact stresses σHlim - Endurance limit for contact stresses