同步轮规格主要部位理论尺寸表（挡边尺寸仅供参考）XL型（节距=5.08mm）同步轮规格齿数节径d外径do档边直径df档边内径db档边厚度h10XL1016.1715.662211111XL1117.7917.282211112XL1219.4018.902515113XL1321.0220.512515114XL1422.6422.132617115XL1524.2623.752919116XL1625.8725.362921117XL1727.4926.983221118XL1829.1128.603221119XL1930.7230.2234.524.5120XL2032.3431.8337.828121XL2133.9633.4537.828122XL2235.5735.074027123XL2337.1936.684027124XL2438.8138.304432125XL2540.4339.924432126XL2642.0441.434929127XL2743.6643.154838128XL2845.2844.774838130XL3048.5148.0051361.232XL3251.7451.2461451.234XL3454.9754.4761451.236XL3658.2157.7061451.238XL3861.4560.9464481.240XL4064.6864.1769541.242XL4267.9167.4173551.244XL4471.1570.6478581.246XL4674.3873.8778581.248XL4877.6277.1184641.250XL5080.8580.3490701.260XL6097.0296.51102831.272XL72116.43115.921231031.2)