With its rack and pinion gearboxes, STOBER offers compact, dynamic solutions for linear motions. Now, thanks to new FEM calculation methods and optimised microgeometries, the drive specialist is significantly increasing their performance. The results have been validated in extensive test series. Users benefit from higher feed forces with the same compact design. This opens up more options for space-saving machine concepts, especially for large machine tools.

Martin Preece, Head of UK Subsidiary for STOBER explains: “We have further increased the performance of our rack and pinion gearboxes; a combination of the proven PH planetary gearboxes and ZTR and ZTRS pinions for sophisticated drive concepts or use in feed axes.

“Depending on the size, the maximum feed forces can now be up to 20 percent higher than before. This further strengthens our ability to compete on the market.”

The higher values are based on new FEM calculation methods that examined the loads from the interaction of the torque and pinion forces in more detail. STOBER also improved the microgeometry of the toothing and validated the results in extensive test series. The optimisations are part of the continuous further development of the mechanical drive components in terms of power density, dynamics and process reliability.

“Our rack and pinion gearboxes are capable of delivering feed forces up to 124 kN,” continues Martin, “making them particularly suitable for large machine tools and machining centres. This enables us to respond optimally to the growing demand for these powerful and compact solutions in international markets without having to pass cost increases on to our customers.”

For mechanical engineers, the higher performance yields concrete advantages. In many applications, smaller sizes can be used, which reduces installation space, weight and costs. At the same time, the axis systems become more dynamic. This enables more compact and economical machine concepts, especially for large portal machines with several synchronised drives. The higher performance values have already been incorporated into STOBER’s catalogues, design tools and online configurator.

Martin concludes: “With our extensive product portfolio, STOBER offers maximum flexibility for implementing linear motion with high precision. The motor, gearbox, pinion and gear rack allow custom combinations.”