2 Guiding systems Precision rail guides
Precision rail guides
Modular range rail guides
Figure 28
The modular range (➔ figure 28) consists of a matrix range of rail guide modules which enable an individual choice of combinations of rails and rolling element assemblies. Different requirements for the guides do not call for changes in the design or mechanical environment. Selection of the right rail guide is made depending on the mechanical conditions of the application in question. The operating requirements are covered by five different models which may be defined as rail guides with: – crossed roller cage assemblies of the standard LWR series – ball cage assemblies of the LWR series – crossed roller cage assemblies of the optimised LWRE series – needle roller cage assemblies of the LWRM/LWRV series – slideway liners of the LWRPM/LWRPV series. Precision rail guides are suitable for applications with limited strokes requiring high stiffness and positioning accuracy. The modular range series of rails makes it possible to select internal design and/or rolling assemblies to suit application requirements without changing the envelope dimensions of the rails.
LWR LWRE LWRM/V LWRPM/PV
LWR
Anti-creeping systems (ACS systems)
Figure 29
The ACS system prevents cage creeping (➔ figure 29). It is available for any product from the LWRE range. The modular rail range, which is completely interchangeable, is given in Table 20. This range is suitable for applications with limited strokes requiring high stiffness and positioning accuracy.
Table 20 Modular range: interchangeable rail programme
Basic load rating
Speed
Noise
Stiffness
Precision
Crossed rollers LWR
Crossed rollers LWRE
Needle rollers
Sliding liners
80
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