Which workholding device provides additional support for long workpieces?

Which workholding device provides additional support for long workpieces?

• A. Center
• B. Chuck
• C. Magnetic chuck
• D. Collet

Answer: (A)

Providing end support for long workpieces is essential to keep them straight and reduce deflection during machining. A center, used in the tailstock, offers axial support at the far end of the part. This stabilizes the piece as it extends from the chuck, minimizing bending, vibration, and chatter and helping maintain concentricity and accuracy for long lengths. The other devices have different primary roles. A chuck grips the front end but doesn’t supply support along the length, so a long piece can bow or whip beyond the grip. A magnetic chuck holds ferrous parts on a flat surface but isn’t used to support long slender workpieces during turning. A collet clamps the piece tightly at a single zone near the end, providing strong radial grip but not the additional end support needed to prevent deflection along the length.

Providing end support for long workpieces is essential to keep them straight and reduce deflection during machining. A center, used in the tailstock, offers axial support at the far end of the part. This stabilizes the piece as it extends from the chuck, minimizing bending, vibration, and chatter and helping maintain concentricity and accuracy for long lengths.

The other devices have different primary roles. A chuck grips the front end but doesn’t supply support along the length, so a long piece can bow or whip beyond the grip. A magnetic chuck holds ferrous parts on a flat surface but isn’t used to support long slender workpieces during turning. A collet clamps the piece tightly at a single zone near the end, providing strong radial grip but not the additional end support needed to prevent deflection along the length.