The Traub TNL26 sliding headstock machine from Index Corp. is available with two 12-station turrets (Y axis optional on both turrets), a five-station endworking tool carrier, a counterspindle and a five-station backworking tool carrier; the maximum Z-axis travel is approximately 10" on the L version and 4" on the K version. The maximum number of fixed tools is approximately 58. Of these 58, 32 can be live tools.

With this sliding headstock, up to four tools can cut simultaneously, resulting in higher production rates. The design of the work tool carrier (slave axis) to the first, permitting engagement of more than one tool in cut at the same time. Turret 2 position can be overlapped with Turret 1 because it has an additional Z axis allowing it to follow Turret 1. The same holds true for the front working tools, which can also be overlapped, because they also follow turret one. The counterspindle and the backworking station have independent Z- and X-axes, so that the backwork operation can also be overlapped with the three tools in cut on the main spindle for a total of four.

Sliding and fixed headstock machines from the same building block concept allow full interchangeability of all tooling and other workpiece-related accessories between sliding and fixed headstock machines of the same model size.