xxx 2013-09-23

Corrosion resistant with FDA-certified materials

Corrosion resistant with FDA-certified materials

Withstand a relative humidity above 70 percent and temperatures above 30 °C over an indefinite period – the new NRFG ball rail system by Rexroth.

The new NRFG ball rail system by Rexroth is designed with materials and engineering making it particularly well-suited for use in humid to wet production environments. The profiled rail and the ball runner block are both made entirely of corrosion resistant steel according to DIN EN 10088 and of certified plastics according to EU Directive 2002/72/EC and US Regulation FDA21CFR. The NRFG ball rail systems are offered in five sizes and can withstand a relative humidity above 70 percent and temperatures above 30 °C over an indefinite period.

The certified plastic parts in the new ball rail system are even resistant to weak acids, lyes, organic solvents, oils and alcohols. They are strong and possess good sliding properties. Contrary to systems made from coated noncorrosion resistant steels, NRFG ball rail systems are not affected by surface damage and any corrosion resulting therefrom. This increases their service life significantly. The ball rail systems are corrosion resistance class 2 and hygiene class 3 compliant.

The profiled rail can be mounted from the top, using the clip-on stainless steel cover strip to create a smooth surface. Alternatively, the user can cover the mounting holes with white caps, or mount the profiled rail from underneath. The fully integrated sealing results in longer lubrication intervals, which means less maintenance. The ball runner blocks are not pre-lubricated so that users can fill in the proper lubricant recommended for their specific applications. Lube ports with metal threads are provided on all sides to give engineers a greater degree of freedom when space is tight.

Suitable for high humidity and temperatures

NRFG ball rail systems are perfect in dry working zones such as primary packaging, even in environments where there is a combination of high humidity and high temperatures. Combined with screens or other protective barriers, they are also suitable for splash areas and wet working zones in food processing, where liquid, moist or sticky foods stick to machine parts, or which are wet-cleaned and disinfected. Using FDA-certified plastics throughout eliminates the risk of unacceptable contamination during processing.

Quiet operation and easy installation

The ball runner blocks, which come in a flange version or a narrow version,are available in accuracy class H and in three preload classes. The O configuration of the balls ensures that the system has the required rigidity and equally high load capacities in all four main loading directions. Users can mount parts onto the runner blocks from the top or from underneath.

Additional mounting holes in the middle of the runner blocks allow to increase both, surface and lateral rigidity. The entry zone geometry and a high number of balls reduce fluctuations in spring action in the runner block. Optimal ball rail and recirculation design results in smoother, quieter operation. For long axes, Rexroth offers multi-part ball rail systems with clearly marked part lengths for safe and easy installation.

For a list of specifications as well as available features and accessories please visit

About Bosch Rexroth:

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, pneumatics, gear technology, and linear motion and assembly technology all from one source. With locations in over 80 countries, more than 37,500 associates generated sales revenue of approximately 6.5 billion euros ($8.4 billion) in 2012.

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About Bosch:

The Bosch Group is a leading global supplier of technology and services, active in the fields of automotive technology, energy and building technology, industrial technology, and consumer goods. According to preliminary figures, more than 306,000 associates generated sales of 52.3 billion euros( $67.2 billion) in 2012. 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 some 4.5 billion euros ($5.8 billion) for research and development in 2012, and applied for over 4,700 patents worldwide. The Bosch Group’s products and services are designed to fascinate, and to improve the quality of life by providing solutions which are both innovative and beneficial. In this way, the company offers technology worldwide that is “Invented for life.”

Additional information is available online at and

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 solutions. 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. For more information, please visit, and


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