The star SB20 machine is a type of Swiss-style automatic lathe that is commonly used in the manufacturing industry for precision turning and machining of small to medium-sized parts. It is designed to perform a range of operations, including drilling, tapping, milling, and threading, among others.

The SB20 machine is equipped with a rotating main spindle that can hold the workpiece and several tool positions arranged around the spindle. The tools are mounted on slides that move radially and axially to perform the required operations on the workpiece. The machine also has a programmable control system that allows for high precision and flexibility in the machining process.

The SB20 machine is particularly useful for producing complex parts with tight tolerances and in large quantities. It is commonly used in industries such as automotive, aerospace, medical devices, and electronics, among others.