This is Rollon's highly versatile premier line of completely enclosed Belt driven-driven linear actuators.

The ELM is available in four sizes from 50 to 110 mm, it has a self-supporting structure with a robust square-section of extruded and anodized aluminum. The thrust force is transmitted by a steel reinforced polyurethane Belt driven. The moving carriage is precision guided and supported by a linear guide system or optional cam roller system.

A polyurethane sealing strip guarantees a complete protection of the Belt driven and the linear guide system against dust, dirt, chips, liquids or other contaminants. It avoids the fragility of other sealing systems, including stainless steel strips.

The components used for linear motion --lubricant reservoir, caged ball bearing blocks, double-lip seals-- promote a "maintenance-free" system. The pulleys, bearings and drive shafts are among the most robust in the industry. ELM is the best product for applications in very aggressive working environments that also require high speed duty cycles and position repeatability.

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Corrosion-resistant Version

 

With the ELM series, corrosion-resistant linear units are now available for service in a difficult environment or which can frequently be cleaned. The self-supporting structure of the units, of extruded anodised aluminium with square cross-section, forms the basis of four different sizes in the series from 50 to 110 mm. Drive is through a steel-cord reinforced polyurethane timing belt, which according to choice is led over two linear guide blocks with caged ball technology or alternatively over track rollers.

Anodised aluminium (type Anticorodal 6060 and 6082) forms the basis of the corrosion-resistant version of the ELM, while ball-bearings, ball-races, unions and other components are manufactured in corrosion-resistant steel (AISI 303 and 404C). With the use of these materials, corrosion caused by moisture can be prevented or at least substantially delayed.
Use of the corrosion-resistant series is authorised in both the food processing industry and pharmaceutical manufacturing plant. In general, a surface coating specially approved for the purpose and the use of special lubricants prevent the surroundings being dirtied by the linear units.

In order that no dirt can penetrate from outside either, a polyurethane strip fixed to the top of the aluminium profile affords a very effective protection for the drive- and guidance systems - above all in critical environments. In addition, there is a compressed air connection through which it is possible to pressurise the interior of the linear unit with a current of air to block the penetration of any dirt from outside.

Thanks to an integrated relubrication system ("Maintenance-free system") for all corrosion-resistant linear units with either caged ball or spacers (with the exception of "clean-room" applications and applications in which synthetic lubricants are prohibited) manual relubrication of the units is no longer necessary.