Correct option is C
Jigs are
work-holding devices that guide cutting tools, ensuring
accurate hole placement and
repeatability. They are primarily used in
drilling machines to hold and position workpieces while guiding the drill bit. The main advantage of using jigs in drilling operations is that they
eliminate the need for layout marking and manual positioning, improving efficiency and accuracy.
Reasons of using jigs:
·
Ensure precise hole location without repeated measurement.
·
Increase production efficiency by reducing setup time.
·
Allow for mass production with uniform hole placement.
·
Improve accuracy and repeatability compared to freehand drilling.
·
Can be used with multiple drills (multi-spindle drilling) for high-speed production.
·
Eliminate human error in manual drilling operations.
