Which is the most common workholding method on a milling machine?

• A. Holding in a chuck
• B. Holding between centers
• C. Holding in a vise
• D. Holding in a collet

Answer: (C)

Holding the workpiece in a milling vise on the machine table is the most common method because it provides a rigid, flat reference surface for accurate positioning and locking. The vise can grip a wide range of shapes and sizes with adjustable jaws, and it works well with parallels, soft jaws, and various fixtures to ensure square, repeatable setups for multiple operations across different faces. This setup also allows easy access for the cutter to approach the work from different angles while keeping the part securely clamped during milling. Other options are more limited in milling contexts: a chuck is typically used for holding round stock or parts in turning-oriented setups and doesn’t offer the versatile, multi-face access a vise provides; holding between centers is a turning method, not suited to milling; and a collet is excellent for holding tools or small, well-suited workpieces in the spindle or a dedicated fixture, but is less practical for general workholding on a milling table.