xxx 2012-09-18

MINEXPO 2012: Hydrotrac GFT-N Hydrostatic Travel Drives

MINEXPO 2012: Hydrotrac GFT-N Hydrostatic Travel Drives

Rexroth Hydrotrac GFT-N hydrostatic travel drives offer a low maintenance, easy-to-install solution.

With output torques from 600 to 1,300 kNm and a dual motor configuration, HYDROTRAC GFT-N hydrostatic travel drives from Rexroth allow faster travel speeds, along with proven performance and reliability, in mining excavators and crawler cranes.

The HYDROTRAC GFT-N travel drive is a three-stage planteary gear with pre-arranged spur gear specifically designed for mining excavators and track-laying cranes. With ouptput torques between 600 and 1,300 kNm and a dual motor configuration, the drive allows for faster travel speeds than single motor drive configurations by taking advantage of the faster speed rating of the smaller motor.

The drives can be integrated as a complete unit into the undercarriage frame, with the sprocket mounted to the output side transmitting the required torque to the track. The offset motor mount also allows increased ground clearance.

The compact, space-saving plantetary gear complies with operational strength requirements, including those specified in DIN 3990, ISO 6336, AGMA, GL and DNV, while also reflecting customary standard design regulations for proven performance and reliability.

Rexroth hydraulic motors are integrated as flanged-on fixed or variable displacement units plugged into the gearbox. As a standard supply feature, the gearboxes come with one or two spring-loaded hydraulically released multiplate parking brakes attached on the input side. The parking brake torque suits the respective motor torque.

Rexroth has incorporated design features into the Hydrotrac GFT-N travel drives that make installation easy, help ensure uptime and minimize maintenance. An axial mechancial seal arranged between the stationary and rotating gearbox sections prevents moisture and dirt from entering the drive, even under extreme operating conditions. In addition, maintenance is limited to regular oil changes, which can be made conveniently from the gearbox end cover.

For more information, or to view a list of available features and accessories for HYDROTRAC GFT-N travel drives, please visit

Bosch Rexroth AG is one of the world’s leading specialists in the field of drive and control technologies. Under the Rexroth brand name, the company supplies more than 500,000 customers with tailored solutions for driving, controlling, and moving. Bosch Rexroth is a partner for Mobile Applications, Machinery Applications and Engineering, Factory Automation and Renewable Energies. The company provides customized solutions tailored to the needs and specifications of each individual market. As The Drive & Control Company, Bosch Rexroth develops, produces, and sells components and systems in over 80 countries. As part of the Bosch Group, Bosch Rexroth and its 38,400 associates generated approximately 6.4 billion euros ($8.9 billion) in revenue in 2011.

To learn more, please visit

In the U.S., Canada and Mexico, the Bosch Group manufactures and markets automotive original equipment and aftermarket products, industrial drives and control technology, power tools, security and communication systems, packaging technology, thermotechnology, household appliances, solar energy, healthcare telemedicine and software innovations. Having established a regional presence in 1906, Bosch employs over 22,500 associates in more than 100 locations, with sales of $9.8 billion in fiscal year 2011, per preliminary figures. For more information, visit

The Bosch Group is a leading global supplier of technology and services. According to preliminary figures, more than 300,000 associates generated sales of 51.4 billion euros ($71.5 billion) in the areas of automotive and industrial technology, consumer goods, and building technology in fiscal year 2011. The Bosch Group comprises Robert Bosch GmbH and its more than 350 subsidiaries and regional companies in some 60 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. Bosch spent more than 4 billion euros ($5.5 billion) for research and development in 2011, and applied for over 4,100 patents worldwide. With all its products and services, Bosch enhances the quality of life by providing solutions which are both innovative and beneficial. Further information is available online at and


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