Which is the function of leadscrew?

Which is the function of leadscrew?

• A. Leadscrew
• B. Tailstock sleeve
• C. Quick-change gearbox
• D. Distance between centers

Answer: (A)

On a lathe, the leadscrew provides the controlled linear motion of the carriage along the bed, enabling precise feed during turning and threading. Its threaded shaft drives a nut in the carriage, so as the screw rotates, the carriage moves in a straight line. When threading, the half-nut engages the leadscrew to advance the tool by exactly one lead with each spindle revolution, giving the correct thread pitch and consistent cutting depth. This automatic, synchronized feed is what makes threading and long turning accurate and repeatable. Other parts have different roles: the tailstock sleeve holds centers or tooling in the tailstock, the quick-change gearbox adjusts feed and thread gear ratios, and the distance between centers is just a measurement of setup length.

On a lathe, the leadscrew provides the controlled linear motion of the carriage along the bed, enabling precise feed during turning and threading. Its threaded shaft drives a nut in the carriage, so as the screw rotates, the carriage moves in a straight line. When threading, the half-nut engages the leadscrew to advance the tool by exactly one lead with each spindle revolution, giving the correct thread pitch and consistent cutting depth. This automatic, synchronized feed is what makes threading and long turning accurate and repeatable. Other parts have different roles: the tailstock sleeve holds centers or tooling in the tailstock, the quick-change gearbox adjusts feed and thread gear ratios, and the distance between centers is just a measurement of setup length.