Correct option is B
Chatter in machine tools is a form of
undesirable vibration that occurs during machining operations such as turning, milling, or grinding. It is caused by
self-excited vibrations, which arise due to the interaction between the cutting tool and the workpiece.
These vibrations are termed
self-excited because they are sustained or amplified by the dynamic forces generated during the cutting process itself.
Key Characteristics of Chatter:
· Produces
poor surface finish on the workpiece.
· Causes
excessive tool wear or even tool breakage.
· Leads to
noise and
instability in the machining process.
· Reduces
accuracy and
productivity.
