Monorail guide reduces friction by 40% and includes lubricator

Written by: Schaeffler (UK) Ltd | Published:

Schaeffler has extended its RUE-E range of linear recirculating roller bearings and guideway assemblies to include a new size, the RUE25-E, which also offers a range of new integrated features and technical benefits.

High precision motion control of machine tools increasingly requires ready-to-fit, complete linear motion systems with integrated features such as sealing and lubrication, specifically matched to the application.

For the main axis of machine tools, monorail guidance systems based on recirculating balls and rollers are well proven alongside flat cage units and linear recirculating roller bearings. These systems are ready-to-fit, preloaded and can support loads and forces from all directions. Schaeffler's RUE-E series of linear recirculating roller bearing and guideway assemblies are primarily used in these applications due to increasingly heavy workpieces, new machining materials and high cutting forces. These units offer very high load carrying capacities, greater flexibility and integrated functions.

Schaeffler's RUE25-E maintains numerous proven features from its predecessor, the RUE-D series, but also provides more integrated functions. These include, for example, a lubricator that distributes the minimum volume of lubricant. This enables lubrication with oil (rather than grease), regardless of the mounting position and without additional precautions needing to be taken such as extra lubricant connectors on both sides of the carriage.

By optimising the design, materials and manufacturing process for the RUE25-E, Schaeffler has also reduced friction and displacement resistance by approximately 40%. This results in improved performance in terms of the running characteristics and dynamics of the guides, as well as an increased maximum travel speed of up to 3 m/s. The power density of the unit is therefore higher, while the size and dimensions remain similar. The new optimised sealing concept for the RUE-E series is also fully maintained. Even the standard design incorporates double lip end wipers. These keep the lubricant inside the carriage and prevent the ingress of contaminants. The rolling element recirculating systems are therefore sealed in the best possible way for every conceivable application.

For more information on the RUE25-E, please call Schaeffler UK's Marketing Department on 0121 313 5870. Alternatively, email

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