LM Guide THK - Industrial Technologies

Индастриал Технолоджис www.industrial‐technologies.com.ua +38 044 498 21 94Jointed LM rail[Level Difference Specification for the Joint]An accuracy error in LM rail installation hasinfluence on the service life of the product.When installing the LM rail, take care to minimizethe level difference in the joint within thespecification indicated in Table2. For the jointbetween curved rails and another between thecurved section and the joint rail, we recommendusing a flushing piece like the one shown inFig.1. When using the flushing piece, place thefixed butt piece on the outer side, push the railagainst the butt piece, and then adjust the leveldifference in the joint section by turning theadjustment screw from the inner side.Fig.1 Flush pieceTable2 Level Difference Specification for the JointUnit: mm[About the Curved Section]The curved section of model HMG has a clearance for a structural reason. Therefore, this model maynot be used in applications where highly accurate feed is required. In addition, the curved sectioncannot withstand a large moment. When a large moment is applied, it is necessary to increase thenumber of LM blocks or LM rails. For permissible moment values, see Table1 on B1-183.[Jointed LM Rail]Model HMG always requires a jointed rail wherean LM block travels from the straight section tothe curved section and where the curve isinverted such as an S curve. Take this intoaccount when design the system.Pin or butt pieceModel No.Ballraceway,side faceUpper faceMaximumclearanceof the jointsection15 0.01 0.02 0.625 0.01 0.02 0.735 0.01 0.02 1.045 0.01 0.02 1.365 0.01 0.02 1.3Note) Place the pin on the outer circumference and the bolt on the inner circumference.adjustment boltM1bhaG F F/2Ld2Industrial TechnologiesWod1W1B1-184