LM Guide THK - Industrial Technologies

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Индастриал Технолоджис www.industrial‐technologies.com.ua +38 044 498 21 94Rated Loads in All DirectionsModel SRG is capable of receiving loads in fourdirections: radial, reverse radial and lateraldirections.The basic load ratings are uniform in the fourdirections (radial, reverse radial and lateraldirections), and their actual values are providedin the specification table for SRG.Equivalent LoadWhen the LM block of model SRG receives loads in all directions simultaneously, the equivalent loadis obtained from the equation below.PEPRPE : Equivalent load (N): Radial direction: Reverse radial direction: Lateral directionPR : Radial load (N)PL : Reverse radial load (N)PT : Lateral load (N)Service LifePLFor details,see A1-76.Radial Clearance StandardFor details,see A1-91.Accuracy StandardsFor details,see A1-95.PTShoulder Height of the Mounting Base and the Corner RadiusPTPLFig.1PRPTIndustrial TechnologiesFor details,see A1-311.A1-286
Индастриал Технолоджис www.industrial‐technologies.com.ua +38 044 498 21 94Features of Each ModelUltra-high Rigidity Type Model SRGError Allowance of the Mounting SurfaceThe caged roller LM Guide Model SRG features high rigidity since it uses rollers as its rolling elementand it also features a cage-retainer which prevents the rollers from skewing. However, high machiningaccuracy is required in the mounting surface. If the error on the mounting surface is large, it willaffect the rolling resistance and the service life. The following shows the maximum permissible valueaccording to the radial clearance.Table1 Error Allowance in Parallelism (P) between Two RailsRadial clearanceModel No.Normal C1 C0SRG 15 0.005 0.003 0.003SRG 20 0.008 0.006 0.004SRG 25 0.009 0.007 0.005SRG 30 0.011 0.008 0.006SRG 35 0.014 0.010 0.007SRG 45 0.017 0.013 0.009SRG 55 0.021 0.014 0.011SRG 65 0.027 0.018 0.014SRG 85 0.040 0.027 0.021SRG 100 0.045 0.031 0.024Fig.2Table2 Error Allowance in Vertical Level (X) between Two RailsRadial clearance Normal C1 C0Permissible error on themounting surface X0.00030a 0.00021a 0.00011aXX1X2Example of calculationRail spanError allowanceof the mountingsurfaceX1 : Level difference on the rail mounting surfaceX2 : Level difference on the block mounting surfacewhen a 500mmX 0.0003 500 0.15X1Fig.3aX2Tolerancefor parallelism PUnit: mmUnit: mmLM GuideIndustrial TechnologiesTable3 Error Allowance in Level (Y) in the Axial DirectionPermissible error on the mounting surface 0.000036bUnit: mmYbFig.4A1-287
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LM Guide THK - Industrial Technologies

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