538,017 active members*
2,431 visitors online*
Register for free
Login Register
INDEX-Werke // INDEX TRAUB - Banner

TRAUB TNL20 - Productive and precise

A first striking novelty is the new appearance of the sliding/fixed headstock automatic lathe TRAUB TNL20: The clearly structured exterior is based on the technical requirements – without unnecessary breaks and edges. Basic characteristics valued by users of previous TRAUB designs are retained, such as the large sliding guard at the front. It contains a generous large inspection window to the work area, as well as a roller shutter that allows comfortable access to the main spindle and its periphery.

The sleek outer design provides excellent conditions for the setup of the machine.

Another essential component of the new design is the control cabinet integrated completely into the machine cube. Any protruding elements are avoided, so that the right side of the machine is freely accessible for easy attachment of any bar loading magazine.


Layout and versions of the TNL20

The basis of the TNL20 is a rugged, extremely rigid and vibration-damping cast iron bed. All assemblies are built on it. The generous and vertically designed work area also ensures the necessary degrees of freedom for the machining of workpieces, as well as very high process reliability by the free chip flow.

 The sliding/fixed headstock automatic lathe TRAUB TNL20 is launched in two versions. They can be variably equipped and excel by their high productivity: one equipment level is the TNL20-9, which has nine linear axes, two turrets (each with 8 stations, max. 12,000 rpm, 2.0 kW), a back working attachment (4 stations), and an autonomous counter spindle. So already with the TNL20-9, you can use three tools simultaneously, resulting in increased productivity.

The TNL20-11 is equipped with an additional front working attachment (6 stations, 3 of which are live, max. 12,500 rpm, 2.0 kW) on an autonomous X/Z slide. By the interpolation of the H indexing axis of the front working attachment with the X-axis of the autonomous compound slide, Y machining operations or tool offsets can also be easily performed with the front working attachment on the main spindle. At this equipment level, it is also possible to produce with up to four tools simultaneously to reduce machining times.


Powerful work spindles

Main and counter spindles (max. 10,000 rpm, 5.5 kW, 17.2 Nm) of the TNL20 are identical and designed as the liquid-cooled module motor spindles.

The work spindle has also a clearance in the draw tube of 29 mm, allowing the use of a standing reduction tube for bar stock diameters up to 20 mm. This ensures excellent guide quality that is ultimately noticed in the precision of the machined part. The guide bushings used in the TNL20 in sliding headstock operation are identical with those of its predecessor machine, the TNL18. The lathe can be converted in just a few minutes from fixed headstock to sliding headstock turning.


High productivity through clever kinematics

With its additional front working attachment, the TNL20-11 has a second upper tool carrier with six stations. Three tool mountings are live, one is equipped even with a double holder. The front working attachment has an autonomous compound slide in Z and X, as well as an NC swivel axis. By its interpolation with the X-axis, a Y-axis function can be implemented. This way the user can adjust his tool to the spindle center also simply by a position offset, which is of great importance, for example, for deep-hole drilling.

The back working attachment, which can be added both to the TNL20-9 and the TNL20-11, has been completely redesigned. While it was designed on the TNL18 as a separate unit, it is now arranged on the lower turret. It has four tool mountings arranged at sufficient distances, so that almost no disturbing edges develop with inactive tools during machining. It is easily accessible during setup and well visible when running in a CNC program.

The arrangement of the counter spindle and of the back working attachment provides an optimal power flow, thereby significantly improving the rigidity and precision of rear end machining.

Also, the axes of the lower turret can be coupled with the back working attachment and counter spindle, so that the back working attachment can be used for independent machining. This also contributes to an increase in productivity. While working simultaneously on the main spindle with the two turrets and the front working attachment, the counter spindle can be active at the same time with the back working attachment. So the TNL20-11 is capable of machining with four simultaneous tools and the TNL20-9 with three tools.


Generous tool carriers and sophisticated peripherals for flexible production

The TNL20-11 provides a total 26 tool stations. With the use of double and triple holders in the generously designed turrets, you can easily deploy up to 58 tools. The large tool pool allows the machining of complex workpieces and machining of entire part families without tool changes or major setup effort.

To optimally support all machining operations, a comprehensive cooling lubricant management is used. This includes 600 liters of coolant lubricant volume and up to four pump stations. In addition, an optional 120-bar pump ensures high-pressure supply, which is available also on the front and back working attachments. The resulting chips can be removed from the machine either with a drag link or slat band chip conveyor.


Parts handling and automation

Small parts can be easily and quickly flushed through a tube inserted in the indexing axis of the lower tool carrier onto a conveyor belt on the right of the machine and carried away.

For larger workpieces, an optional two-axis gantry unit is used that moves into the work area with a linear Z-axis and then swings in front of the counter spindle. After the gripper has taken over the part, the axis retracts. The workpieces are deposited individually.

Long workpieces can be discharged through the counter spindle up to a length of 700 mm.

 As another possibility of automated machining of sawing sections or preformed blanks, the robot cell Xcenter has been developed and completely integrated into the machine. It is essentially comprised of an articulated arm robot and a vertical pallet storage device with 28 slots. This automation solution docked at the front allows the user to feed the sliding/fixed headstock automatic lathe even with parts that are larger than 20 mm in diameter. In addition, the robot cell is already prepared for integrating a 3D measuring device. Integrating other additional process steps, such as deburring, is possible as well.



More control comfort

 Industry 4.0 with: Xpanel i 4.0 ready

Xpanel allows access to the corporate IT network of customers via the control panel of the machine. With Xpanel your staff always has all relevant information for efficient production right at the machine. Xpanel is already included as standard in the Traub control and can be individually extended.


Contact:           INDEX-Werke GmbH & Co. KG Hahn & Tessky
                        Michael Czudaj
                        Sales Manager Germany and Austria
                        by calling +49 711 3191-570



Responsible for the content of this press release: INDEX-Werke GmbH & Co. KG Hahn & Tessky


INDEX-Werke GmbH & Co. KG Hahn & Tessky
Plochinger Str. 92
73730 Esslingen
(+49 711) 31 91-0
(+49 711) 31 91-5 87

Route planner

Route planner