keywords: Minimal quantity lubrication, dry machining, water mist jet cooling
Green machining is an environmental friendly metal removal process. There are few machining processes which can be categorized as green, such as Minimal Quantity Lubrication (MQL), dry machining and water mist jet cooling. This paper discussed the advantages and disadvantages of all green machining method. MQL that uses vegetable oil as lubricant is proved to be effective in reducing tool wear and small amount of wastage is produced. However, lubricant that penetrates cutting zone evaporates into tiny particles which can be hazardous to the workers. Mist collector is required to filter off the tiny particles. Dry machining is safe to both workers and the environment, but the high tool wear rate is not very economical especially when high speed machining. Water mist jet cooling reduces tool wear more effectively compared to flood machining and dry machining and maintains reasonable tool life. Reasonable tool life is more practical in industries as it involves high cost in tooling.