TB/T 449-2016 English PDF (TBT449-2016)

This standard specifies the type and profile of wheel rim tread profiles for railway rolling stock. This standard applies to machined rolling stock wheels. 2 Types and contours 2.1 There are 8 types of rolling stock wheel rim tread shape prototypes, the models of which are: LM, LMA, LMB, LMC, LMD, JM, JM2, JM3. The contours are as shown in Figures 1 ~ 8, respectively. 2.2 There are 25 types of thin rim tread shapes for rolling stock maintenance, including 9 types of LM thin rim treads and 16 types of JM thin rim treads, see Table 1. Table 1 -- Summary table of thin rim tread shapes 2.3 See Appendix A for the point coordinates of the tread contours of LMB type and LMC type. 2.4 See Appendix B for the drawing method of rim tread contour. 2.5 See Appendix C for the comparison table between the old and new names of CN type, XP55 type, LMD type rim treads. Prototype Thin rim tread shape Contour drawingFigure 9 Figure 10 Figure 11 TB/T 449-2016 www.ChineseStandard.net ? Buy True-PDF ? Auto-delivery. Page 5 of 21 Unit in millimeters Figure 1 -- LM type contour Unit in millimeters Figure 2 -- LMA type contour Tread baseline Rim width Tread baseline Rim width TB/T 449-2016 www.ChineseStandard.net ? Buy True-PDF ? Auto-delivery. Page 6 of 21 Unit in millimeters Figure 3 -- LMB type contour Unit in millimeters Figure 4 -- LMC type contour Tread baseline Rim width Tread baseline Rim width TB/T 449-2016 www.ChineseStandard.net ? Buy True-PDF ? Auto-delivery. Page 7 of 21 Unit in millimeters Figure 5 -- LMD type contour Unit in millimeters Figure 6 -- JM type contour Tread baselineRim width Horizontal lineTread baseline Rim width TB/T 449-2016 www.ChineseStandard.net ? Buy True-PDF ? Auto-delivery. Page 8 of 21 Unit in millimeters Figure 7 -- JM2 type contour Unit in millimeters Figure 8 -- JM3 type contour Tread baseline Rim width Tread baseline Rim width TB/T 449-2016 www.ChineseStandard.net ? Buy True-PDF ? Auto-delivery. Page 9 of 21 Unit in millimeters ...