Linear recirculating roller bearing and guideway assemblies (MAI 92)
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The full complement linear recirculating roller bearing and guideway assemblies RUE..-D are the heavy duty designs in the range of INA linear recirculating guidance systems. It is with good reason that they are used wherever linear guidance systems must support extremely heavy loads, where particularly high rigidity is required and where very precise travel is also necessary. It is quite clear: machine tools are their domain. They are at home here and this is where they have proved extremely successful in many applications. In order to make this series of guidance systems even more attractive to the user, it has been completely revised. The result: the new series RUE..-E and RUE..-E-KT-L. RUE..-E guidance systems run on the same guideways as the established RUE..-D series. Changing to the higher performance E versions does not therefore require duplicate stockholding. This simplifies logistical processing and saves on storage costs. > Series RUE..-E The focus here is the same as before: very high load carrying capacity and rigidity. This series was therefore designed as a full complement system. Due to further development of the innovative injection moulding concept, the number of joints between parts in the rolling element recirculation system has been further reduced and the systems intrinsic protection against contamination has been improved (increased functional reliability, reduced displacement force pulsation).With the new lubricant duct design, it is no longer necessary to differentiate between oil and grease lubrication. Each guidance system is now supplied with a lubrication nipple and oil connector. There is thus no longer any need to indicate whether grease or oil lubrication is to be used. The relubrication options have also been substantially expanded. Lubrication is carried out from the side, from the end or from above via the end piece. For lubrication from the side, the end piece has theaded holes for lubrication connectors. If lubrication is to be carried out from the end face, the screw plug is simply replaced by a lubrication connector. The lubrication point can thus be quickly defined on site.If large quantities of contamination are present in operation, additional sealing of carriages is often required. As in the case of RUE..-D, the end seal can be replaced without removing the carriage from the guideway. Optimum protection against contamination is completed by upper and twin lower sealing strips. This saves on set-up time and ensures reliable operation under demanding conditions. Series RUE..-E-KT-L This series corresponds to the RUE..-E-L design. However, the rolling elements are not arranged on the full complement principle, but are guided instead by a rolling element chain. Solutions with a rolling element chain run with less noise than full complement guidance systems. Due to the rolling element chain, there are fewer load-bearing rolling elements in the load zone. Since the longer saddle plate variant is used in the chain version, however, the basic load ratings and rigidity values are similar to those of the full complement standard version.Guidance systems with an integral rolling element chain are available in the series RUE..-E-KT-L and RUE..-E-KT-HL. > 173 759

Linear recirculating roller bearing and guideway assembly scope of basic delivery RUE..-E > M k ֋C 173 742 plastic closing plugsclose off the counterbores of the guideway holes flush with the top surface of the guideway > plastic dummy guidewayprevents damage to the rolling element set while the carriage is separated from the guideway. The carriage is always pushed direct from the guideway onto the dummy guideway > two-piece closing plugs also available as an option >

Contact angle FeaturesInterchangeability The carriage and guideway of a linear recirculating roller bearing and guideway assembly are matched to each other as a standard system due to their closely toleranced preload.It may be possible, after consultation, to use carriages and guideways in different combinations. Contact angle The cylindrical rollers are in an X arrangement and can support compressive, tensile and lateral loads. Corrosion-resistant designs > 173 209 Linear recirculating roller bearing and guideway assemblies RUE..-E are also available with Corrotect > plating.If carriages...

Preload Linear recirculating roller bearing and guideway assemblies RUE..-E are available in preload class V3 (see Table1).Optimum rigidity of the elements is achieved with the smallest possible deviation in the preload force. Linear recirculating roller bearing and guideway assemblies are therefore supplied as preassembled units; the elements are sorted and matched to each other. Influence of preload on the linear guidance system Increasing the preload increases the rigidity.However, preload also influences the displacement resistance and operating life of linear guidance systems. Table 1...

1 Tolerance Accuracy classes With Corrotect > plating > 173 747 G0 m G1 G2 > 4) G3 RRF > 2) RRFT > 3) m m m m mHeight toleranceH 5 10 20 25+6+3Height difference > L b/2 A 37 15 22+30 > 1) 1 1) Dimensional difference between several carriages on one guideway, measured at the same point on the guideway. > L 2) Displacement in tolerance zone (guideway and carriage plated). > 3) Displacement in tolerance zone (guideway only plated). > 4) Standard accuracy class. > 173 214 Roller bearing and guideway assembly Tolerances of guideways, as a function of length l Multi-piece guideways > max1) 0,1%of...

Hole patterns of guideways > j L RLL = aaa Unless specified otherwise, the guideways have a symmetrical hole pattern. For an asymmetrical hole pattern (customer request), the following must apply: > 1 Locating face Locating face ■ a > L a > Lmin and a > R a > Rmin (Figure4). Maximum number of pitches between holes The number of pitches between holes is the rounded whole number equivalent to:The distances a > a L j L RL aa 2a ֢˅() > 2 nl -------------------------------------------= > max Lmin j > L L and a > R are generally determined by:For guideways with a symmetrical hole pattern:Number...