Research article incurred investigation of Surface roughness and MRR with dry and cryogenic machining of hard to machine material such as 52100 bearing steel. Machining parameter in this investigation includes variable feed, speed and Depth of Cut using Liquid Nitrogen (LN2) as a coolant. Objective of this research is to increase and crystallized the boundaries of green manufacturing process named as cryogenics in today’s advanced as well as developing industries over dry, flood and MQL machining. Obtained results with cryogenic machining is compared with conventional dry machining in terms of Surface roughness and MRR with end conclusion of that, cryogenic machining becoming vital leading technique when MRR is prime criteria in any machining. While considering Surface Roughness, dry machining is still best overall machining including cryogenic also. Grain structured analysis and optimization of machining parameters in terms of tool forces, tool wear etc. becoming future concern ahead with this research.