What is the function of a vise in milling?

• A. To hold the workpiece securely during milling
• B. To rotate the cutting tool
• C. To measure the workpiece
• D. To lubricate the workpiece

Answer: (A)

Holding the workpiece securely during milling is essential for accuracy and safety. A milling vise clamps the stock to the table, providing rigid support, precise alignment with the cutter, and repeatable positioning for multiple passes. When the piece is firmly held, the cutter can remove material without the part shifting, reducing dimensional errors and improving surface finish while also preventing tool breakage or collisions. The vise isn’t responsible for rotating the cutting tool, measuring the workpiece, or applying lubrication—those tasks belong to the spindle, measuring tools, and lubrication systems, respectively.