PI 011-15 Lohr am Main, 2015-03-05

Putting more power to the road

Following extensive trials with pilot customers, Rexroth launched production of the GFT 8000 series with “off-the-shelf availability” at the start of the year.

Production start for Rexroth’s new HYDROTRAC GFT 8000 gearbox

About a ten percent increase in drive train performance for mobile working machines is achieved by the new HYDROTRAC GFT 8000 transmission units. In this series, based on a modular design, Rexroth is combining two- and three-stage planetary gearing with axial piston motors to match the needs of mobile working machines that are often on the road. An optional internal brake reduces the amount of installation space needed and satisfies the safety specifications for worldwide roadworthiness certification.

Where mobile working machines travel a lot – examples include crop sprayers, heavy-duty transporters and paving machines – roadway performance is important because of its direct impact on productivity. In the new series 8000 HYDROTRAC GFT transmission units, mechanical planetary drives transfer the torque from the hydrostatic drive to the wheels or tracks. In this modular concept, Rexroth uses the newest versions of either variable axial piston motors or fixed-displacement axial piston motors. They operate either in an open or a closed circuit. The higher fluid capacity of the motors and the higher hydraulic pressures, along with the exact matching with the two- and three-stage planetary drives, boost torques and thus performance by some ten percent. That improves travel capacities significantly. At the same time, vehicle manufacturers can sometimes select a smaller nominal size to achieve the same output. This saves installation space.

The option of an integrated multi-disk brake, located inside the unit, further reduces the space required. The brake requires little maintenance and is designed for protection against soiling, an important requirement in crop sprayers, for instance. In conjunction with the High Level Braking system HLB from Rexroth, the dynamic brakes satisfy the exacting safety requirements for speeds up to 50 kilometers per hour. In both Germany and the USA the standard machines featuring drive units equipped with Rexroth dynamic brakes have already been certified roadworthy by the responsible authorities.

Following an extensive testing phase with pilot customers, two models in the 8000 series made their debut at the beginning of the year and are now available “off the shelf”. They achieve nominal torques of 20 and 30 kNm. Seven further models are to follow in the course of the first half of the year, for an output range from 10 kNm to 130 kNm.

Thanks to the modular concept devised for this platform, OEMs can vary the drive torques and transmission ratios closely, matching them exactly to the vehicle at hand. Rexroth delivers these drive units as complete assemblies, ready for installation. This reduces the effort required for both logistics and vehicle assembly.

Economical, precise, safe, and energy efficient: drive and control technology from Bosch Rexroth moves machines and systems of any size. The company bundles global application experience in the market segments of Mobile Applications, Machinery Applications and Engineering, Factory Automation, and Renewable Energies to develop innovative components as well as tailored system solutions and services. Bosch Rexroth offers its customers hydraulics, electric drives and controls, gear technology, and linear motion and assembly technology all from one source. With locations in over 80 countries, roughly 36,700 associates generated sales revenue of approximately 5.7 billion euros in 2013.

To learn more, please visit

The Bosch Group is a leading global supplier of technology and services. According to preliminary figures, its roughly 290,000 associates generated sales of 48.9 billion euros in 2014. Its operations are divided into four business sectors: Mobility Solutions, Industrial Technology, Consumer Goods, and Energy and Building Technology. The Bosch Group comprises Robert Bosch GmbH and its more than 360 subsidiaries and regional companies in some 50 countries. If its sales and service partners are included, then Bosch is represented in roughly 150 countries. This worldwide development, manufacturing, and sales network is the foundation for further growth. In 2014, Bosch applied for some 4,600 patents worldwide. The Bosch Group’s strategic goal is to deliver innovations for connected life. Bosch improves quality of life worldwide with products and services that are innovative and spark enthusiasm. In short, Bosch creates technology that is “Invented for life.”

Additional information is available online at , and


Search press releases


Susanne Herzlieb
Maria-Theresien-Straße 23
97816 Lohr am Main
Phone: +49 9352 18-1573

Related Articles

Press Infromation

No fear of the extreme: seven records using hydraulics

Force, torque, robustness: These physical advantages have always been used as arguments in favor of using hydraulics in a wide range of applications. For decades, hydraulics have amazed us time and time again by pushing the limits of what is technically possible. Below you will find seven examples of how fluid power moves huge masses safely, precisely and, if need be, quietly, how it can be used for space travel, how it works at the bottom of the ocean, how it forms steel with millimeter precision, and how it saves enormous amounts of fuel.