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Charlotte Stonestreet
Managing Editor |
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More power for precise linear actuators
10 June 2026
STOBER HAS improved the performance of its 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 strengthens STOBER's 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.
STOBER rack and pinion gearboxes deliver feed forces up to 124 kN, making them particularly suitable for large machine tools and machining centers. This enables the company to respond optimally to the growing demand for these powerful and compact solutions in international markets without having to pass cost increases on to 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 catalogs, design tools and online configurator.
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