igus has developed a maintenance-free linear unit - DryLin EasyTube - for format adjustments. This lubrication-free, extremely compact and lightweight system consists of six individual parts - the leadscrew, tube, two clamping rings, an attachment flange and slide block. The system is available ex-stock with a diameter of 25mm, 12 or 30mm.
The external tube guides the slide block and is available either in anodised aluminium or stainless steel. The trapezoidal leadscrew and nut are integrated into the tube so they are protected against external influences and the "EasyTube" system, as a whole, is kept as small as possible by this space-saving design.
With this compact single-tube system, any applied moment is supported by the tube itself, and therefore a second guide shaft is not required.
The slide block, moment support and leadscrew nut are made from a single moulding of the igus heavy-duty polymer "iglidur P". This material is characterised by its high-wear resistance, low friction values and minimal moisture absorption.
The two end blocks for attaching the DryLin EasyTube also serve as a radial and axial bearing system for the leadscrew. As multifunctional components, these end blocks are also made of lubrication-free iglidur P.
This new linear system was developed in close collaboration with igus's customers. Potential application sectors include the packaging and food engineering industries. Although many applications are conceivable (for example, camera and sensor positioning). One customer request was to produce smooth geometric shapes without undercuts and recessions which could act as dirt traps.
With DryLin EasyTube, adjustment tasks can be implemented – maintenance-free – up to 15kg in vertical installation position or 50 kg for an almost moment-free horizontal setup. The system is temperature-resistant up to 80°C and corrosion-resistant when a stainless steel leadscrew is used.