INDEX-Traub ABC 20

The INDEX-Traub ABC 20 is a compact CNC Swiss-type automatic lathe handling bar stock up to 20 mm in diameter, designed for high-precision production of small slender components in medical, watchmaking, electronics, and automotive applications. Combining the Swiss sliding-headstock principle with modern CNC servo drives and the INDEX control philosophy, the ABC 20 delivers the dimensional accuracy and surface finish quality that Swiss-type production demands in an accessible, space-efficient machine package.

In Swiss-type lathe architecture, the bar stock advances through a guide bushing positioned immediately behind the cutting tool, providing support at the point of cut regardless of bar length. This eliminates deflection and chatter on long slender workpieces that would be impossible to hold to tolerance on a conventional lathe. The ABC 20 implements this principle with servo-driven Z-axis headstock motion synchronized with the machining cycle, enabling complex contoured profiles on parts with high length-to-diameter ratios.

The ABC 20 features a main spindle with speeds up to 10,000 RPM and a front working attachment with up to 5 axes of motion, enabling simultaneous front and back working. A backworking attachment enables complete machining of the parted-off face without a second setup. Live tooling positions accommodate cross-drilling, milling, and polygon turning for features perpendicular to the bar axis. The Traub TNL control—or Fanuc control depending on variant—provides Swiss-specific cycles and programming conventions that experienced Swiss-type operators expect.

For medical device manufacturers producing bone screws, dental implants, and miniature surgical components, the ABC 20 represents a right-sized entry into Swiss-type production with the quality credentials of the INDEX-Traub brand. Its 20 mm capacity covers the majority of small medical and electronic component programs without the cost and complexity of larger Swiss-type machines.