154 Int. J. Abrasive Technology, Vol. 2, No. 2, 2009 Experimental investigations on grindability of bearing steel under high efficiency deep grinding (HEDG) S. Ghosh* Department of Mechanical Engineering, Indian Institute of Technology Delhi, New Delhi 110 016, India E-mail: ghosh_sudarsan30@yahoo.com *Corresponding author S. Paul and A.B. Chattopadhyay Department of Mechanical Engineering, Indian Institute of Technology Kharagpur, West Bengal 721 302, India E-mail: spaul@mech.iitkgp.ernet.in E-mail: abcme@mech.iitkgp.ernet.in Abstract: Bearing steel, having three different hardness (R C 32, R C 40 and R C 60), was surface ground using monolayer galvanically bonded cBN grinding wheels under high efficiency deep grinding (HEDG) domain. The grinding forces and material removal rates were determined experimentally. The specific energy requirements during HEDG were determined and compared with the specific energy requirement during the conventional grinding process. It was revealed that the HEDG process under appropriate process conditions required lower specific energy for grinding the bearing steels. The good performance of the HEDG process in this case can be attributed to the retention of sharpness and stability of the cBN grits of the monolayer wheels within the domain of the process parameters employed during this investigation and also to a certain extent due to better and effective application of the cutting fluid during the HEDG process. Keywords: high efficiency deep grinding; HEDG; monolayer cBN wheel; specific energy requirement. Reference to this paper should be made as follows: Ghosh, S., Paul, S. and Chattopadhyay, A.B. (2009) ‘Experimental investigations on grindability of bearing steel under high efficiency deep grinding (HEDG)’, Int. J. Abrasive Technology, Vol. 2, No. 2, pp.154–172. Biographical notes: S. Ghosh is an Assistant Professor in the Department of Mechanical Engineering at Indian Institute of Technology Delhi. His area of research is machining and grinding. Currently his research interest is on cryogenic grinding of conducting ceramics. S. Paul is a Professor of Mechanical Engineering at the Indian Institute of Technology Kharagpur, West Bengal, India. His area of research is advanced machining and grinding. His current research focuses on non-traditional manufacturing processes, high performance machining and grinding and tool coating. Copyright © 2009 Inderscience Enterprises Ltd.