The issue of crack detection and identification has gained wide unfold industrial interest. Failure of shaft is directly affects on the security of surroundings round the machine. Damage is analyzed through visual examination or by the strategy of measuring frequency, mode form and structural damping. Injury detection by visual examination could be a time overwhelming methodology and measuring of mode form furthermore as structural deflection is troublesome instead of measuring frequency. As Non- destructive methodology for the detection of crack is favorable as compared to destructive ways. So, our analysis has been created on the premise of non-destructive ways with the thought of natural frequency.