Who invented the first screw-cutting lathe?

Henry Maudslay invented the first industrially practical screw-cutting lathe. Developed around 1800, it used a sliding tool rest, a lead screw, and changeable gears to cut precise, repeatable threads.

Before Maudslay’s machine, screw threads were often made by hand with chisels and files. His lathe let workshops produce standardized screws, nuts, and bolts, making interchangeable parts practical and helping machine production scale during the Industrial Revolution.

Maudslay did not necessarily invent every component of the machine. Earlier engineers, including Jesse Ramsden, had developed related ideas, but Maudslay’s combination was a major practical breakthrough. He also introduced standardized thread sizes in his own workshop.

A common mix-up is Joseph Bramah, whose hydraulic press and famous lock employed Maudslay early in his career. Maudslay’s lathe, rather than Bramah’s inventions, is the achievement linked to standardized screw manufacture.