Correct option is C
Jigs are
not used in milling operations. Instead,
fixtures are used for milling. Jigs are designed to
guide the cutting tool, such as in drilling, reaming, and tapping, where precise positioning of the tool is required. In contrast, milling operations involve complex cutting motions, where the tool is guided by the machine itself, and fixtures are used to hold the workpiece in place rather than guide the tool.
Jig Function:
· Holds the workpiece and guides the tool.
· Commonly used for drilling, reaming, and tapping where precise hole location is critical.
Fixture Function:
· Holds the workpiece firmly but does not guide the tool.
· Used in milling, turning, and grinding operations where the tool path is controlled by the machine.
Applications of Jigs:
Drill jigs: Guide drills for accurate hole positioning.
Reaming jigs: Ensure that reamers follow the correct path.
Tapping jigs: Used to guide taps during internal threading.
