Predicting the Self-Excited vibrations (Chatter) during the cutting process as a result of the interaction between the cutting tool and work - piece is important as a guide for the cutting machine user for an optimal selection of the back engagement of tool in work piece(depth of cut), the rotational Speed for the specific feed rate which will produce maximum chip removal with out these undesirable vibrations. Such undesirable vibrations can spoil the cutting surface with chatter marks, which will have adverse effects on the whole cutting system. This can be achieved by performing several experimental researches. In the present study, a cutting process was performed by using the slide feeding of Hindustan lathe machine and sintered carbide inserts to cut several cylindrical shafts of 32 mm in diameter and 70cm long steel AISI1050 with out using coolant lubrication to specify the stability limits that represented by curves with the rotational speeds which separate stable and unstable zones for maximum productivity and accepted surface roughness. Also study the effect of feed rate upon the stability and the amplitude of vibration for constant depth of cut and rotational speed.
Key words : stability limit , chatter vibration , self excited vibration