TSCHUDIN T25 – the efficient production grinding machine

The TSCHUDIN T25 is a cost-optimized CNC production grinding machine developed by KELLENBERGER to meet the highest demands for quality and cycle times. The modular and compact construction on this machine type allows the implementation of a wide spectrum of customer-specific applications. By systematically implementing the demands of the market, and with its innovative solutions, the T25 offers high unit volumes and low unit costs in the smallest of spaces.


The TSCHUDIN T25 is the outcome of the concentrated expertise of TSCHUDIN, with its more than 50 years of experience in production cylindrical grinding, and KELLENBERGER, with its more than 100 years of development and manufacturing of precision cylindrical grinders. The outcome reflects the high standard of the HARDINGE GRINDING GROUP in its position as one of production grinding’s market and technology leaders.

The machine base is designed for high grinding wheel powers of up to 10 kW, and grinding wheels with a maximum diameter of 500 mm. Workpieces with lengths of up to 600 mm can be machined. X and Z axes in a T-shaped arrangement allow the use of compact and low add-on assemblies. The extremely stiff linear guide on the X axis forms the basis for high performance and dynamics. This has a positive effect on precision in cylindrical and out-of-round grinding. With the Z axes’ low-wear and circulating-lubrication supported slide guide, an optimum in damping characteristics is achieved.  Everything necessary for short cycle times and high shape and dimensional accuracy is on hand.

Thanks to modular wheelheads, the machine can be adapted for straight, angled or optionally even combined plunge grinding.

Automated loading and unloading is something that is pretty well always expected for production applications, and was treated as central issue during development. As a result, KELLENBERGER can offer various handling variants with the T25, with various options, integrated into the machine concept in a modular and space saving way. The T25’s handling concept is designed for keyhole solutions.

The stiff supports make it possible to achieve the shortest in part changeover times, without any influence on the grinding process (without vibrations, for example).


The newly developed CNC controls, based on the Fanuc 31i and with Windows CE, offer a high level of convenience in terms of setup, programming, and tool management.
Active support in the form of icons and help pictures is available for ISO programming.

The controls offer the option of graphical programming, with support for cylinders, radii, chamfers, cones and contours. Particularly worth mentioning are its user-friendly features, such as detailed process displays, travel stick, and the swiveling control panel.

With its integrated handling system, the portable handwheel makes the setup and operation of enhanced functions even easier.

Machine base

The machine base consists of a sturdy, long-lasting and high quality cast iron bed. The systematic separation of the coolant basin and the vibration-producing components from the machine bed guarantees the highest in thermal stability and a reduction in external influences.

High dynamics is assured, due to axis drives of the newest generation. This allows rapid traverse speeds of 20 m/min. on the longitudinal axis and 10 m/min. on the infeed axis. Generally, absolute glass scales are used on the X and Z axes.


KELLENBERGER provides a large number of proven wheelheads to choose from. This allows enormous flexibility when configuring a user-specific model. For production applications two external wheelheads are available, which can be used in an application-specific way for straight and angled plunge operations. Grinding wheels with diameters to a maximum of 500 mm and a peripheral speed of up to 63 m/s at a power of 10 kW can be used.

Optionally, the wheelheads can be equipped with a semi-automatic or fully-automatic balancing system, structure-borne sound, and a manual or automatic indexing axis.


The handling system is integrated in the machine concept in a space-saving and modular way. The supports for the portal girder were generously dimensioned, and anchored with the base machine in a vibration-neutral way.  (refer to handling picture)

The loading system has a modular configuration. The keyhole solution is available as basis. With this the parts are handed over from the integrated portal to a transfer shuttle. This way, customers can integrate the machine into processing chains or existing robot loader cells any way they wish.

More KEL-Portal modules such as:

Fixed cycle conveyor with or without pallets

Loading/unloading module, fully integrated in the machine for prismatic holder grinding à very short changeover times <1.5 sec

  • Interface for customer-specific automation with standardized loader interface
  • With the process chain, multiple processes are connected up to a central handling system
  • For loading and unloading: V-grippers, H-grippers, double-grippers depending on the application and range of parts

Source Kellenberger

More information

Visit the official Kellenberger website.