Base thickness under-size.|Part not properly clamped in the fixture due to which the part lifted during machining.|Part is clamped with the help of fixture which holds the parts 360 degree in the form of vice, but due to chips blocking between both the jaw's the part got clamped temporarily and during the vibration caused in machining the clamping force reduced and caused the part to lift at one end.|Operator did not ensured the absence of chips in between the jaws.