Which tool is used on a manual lathe to cut threads?

Which tool is used on a manual lathe to cut threads?

• A. Single-point cutting tool
• B. Indexable insert
• C. Forming die
• D. Cutting saw

Answer: (A)

Thread cutting on a manual lathe uses a single-point cutting tool. This tool is ground to the exact thread profile and angles, so as the workpiece rotates, the tool advances axially and removes material along a helical path to create the correct thread pitch and depth. The lathe’s leadscrew (or gearing) controls the axial feed, ensuring consistent, precise thread forms. This approach gives direct control over depth, finish, and alignment, which is essential for accurate threads. An indexable insert can be used for other turning operations, but for standard manual-lathe threading, the single-point tool provides the necessary geometry and control. A forming die would deform material to form threads rather than cut them, and a cutting saw is used for cutting stock, not for threading.

Thread cutting on a manual lathe uses a single-point cutting tool. This tool is ground to the exact thread profile and angles, so as the workpiece rotates, the tool advances axially and removes material along a helical path to create the correct thread pitch and depth. The lathe’s leadscrew (or gearing) controls the axial feed, ensuring consistent, precise thread forms. This approach gives direct control over depth, finish, and alignment, which is essential for accurate threads. An indexable insert can be used for other turning operations, but for standard manual-lathe threading, the single-point tool provides the necessary geometry and control. A forming die would deform material to form threads rather than cut them, and a cutting saw is used for cutting stock, not for threading.