Rolling and sliding hybrid linear bearing
01 April 2010
igus has developed a hybrid linear bearing that both rolls and slides. The DryLin WJRM system reduces driving force significantly and is suitable for applications that combine sliding and rolling movements, such as manually adjustable doors (of up to 50kg weight), guards, partitions and locks, as well as light handling tasks. The lightweight, lubricant-free plastic sliding elements are robust and tolerant of contaminants and humid conditions, as well as being lightweight and cost-competitive.
At a defined installation position, the roller bearing, which carries the main load, reduces the overall driving force by a factor of between four and five, easing manual operation considerably. The main load is on the roller bearing, which reduces the driving momentum required, and the plastic sliders compensate for any lateral forces.
The hybrid linear bearing design is based on igus’ DryLin W linear guide family. The new DryLin WJRM system configuration ensures that the roller fits inside without increasing the overall design width, which remains at 18mm.
Standard economic guide profiles can be used, which are available in three styles for 10mm diameter shafts, either as individual rails for a flexible guiding distance or as double rails with centre spacing of 40mm or 80mm. The hybrid bearing housing is a blue-chromed diecast zinc construction.
Readers can see the new DryLin WJRM at the Advanced Manufacturing event, which takes place at the NEC, Birmingham on April 27 and 28 2010.
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