The Gearbox Manufactory and Heavy Duty Specialist. Founded by Carl Keller in 1901.
We are part of Kumera Power Transmission Group since 2019.


Kumera makes the difference and offers transmission solutions from a single source: We design, manufacture, repair, maintain and optimize with passion and experience, which we have developed especially in the individual production of tailor-made special transmissions. The special Kumera claim also applies to all our services: we always work quickly and absolutely precisely. This is how we guarantee our customers an optimal price-performance ratio.

Our portfolio includes the design and manufacture of gears with diameters of up to 4 meters, but also the development and production of innovative special transmissions based on them with a weight of up to 200 tons.

For all industries, we produce unique geared parts and gearboxes according to individual specifications. In addition, we maintain, repair or optimize both our and third-party gearboxes.