LM Guide THK - Industrial Technologies

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Индастриал Технолоджис www.industrial‐technologies.com.ua +38 044 498 21 94Features and TypesLM GuideFeatures of the LM GuideFunctions Required for Linear Guide SurfaceLarge permissible loadHighly rigid in all directionsHigh positioning repeatabilityRunning accuracy can be obtained easilyHigh accuracy can be maintained over a long periodFeatures of the LM GuideLarge permissible load and high rigidityAccuracy averaging effect by absorbing mounting surface errorIdeal four raceway, circular-arc groove, two point contact structureSuperb error-absorbing capability with the DF designLow friction coefficientSmooth motion with no clearanceSuperbly high speedEasy maintenanceCan be used in various environmentsWide array of options (QZ lubricator, Laminated contact scraper LaCS, etc.)As a result, the followingfeatures are achieved.Easy maintenanceImproved productivity of the machineSubstantial energy savingsLow total costHigher accuracy of the machineHigher efficiency in machine designIndustrial TechnologiesA1-4
Индастриал Технолоджис www.industrial‐technologies.com.ua +38 044 498 21 94Features and TypesFeatures of the LM GuideLarge Permissible Load and High Rigidity[Large Permissible Load]The LM Guide has raceway grooves with a radius almost equal to the ball radius, which is significantlydifferent from the linear bushing. As shown in Fig.1, which compares size between the LMGuide and the linear bushing with similar basic dynamic load ratings, the LM Guide is much smallerthan the linear bushing, indicating that the LM Guide allows a significantly compact design.The reason for this space saving is the greater difference in permissible load between the R-groovecontact structure and the surface contact structure. The R-groove contact structure (radius: 52% ofthe ball radius) can bear a load per ball 13 times greater than the surface contact structure. Sinceservice life is proportional to the cube of the permissible load, this increased ball-bearing load translatesinto a service life that is approximately 2,200 longer than the linear bushing.LM blockLM rail34LM Guide model SSR15XWBasic dynamic load rating: 14.7 kNFig.1 Comparison between the LM Guide and the Linear BushingTable1 Load Capacity per Ball (P and P1)Permissible contact surface pressure: 4,200 MPaR-groove(P)ShaftLinear bushingMounting base24HousingFlat surface(P1)P/P1φ 3.175 (1/8´´) 0.90 kN 0.07 kN 13φ 4.763 (3/16´´) 2.03 kN 0.16 kN 13φ 6.350 (1/4´´) 3.61 kN 0.28 kN 13φ 7.938 (5/16´´) 5.64 kN 0.44 kN 13φ 11.906 (15/32´´) 12.68 kN 0.98 kN 13170Linear Bushing model LM80 OPBasic dynamic load rating: 7.35 kNPR-grooveFig.2 Load Capacity per Ball165P1Flat surfaceLM GuideIndustrial TechnologiesA1-5
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LM Guide THK - Industrial Technologies

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