宝宝多大上幼儿园最好，可以不上吗？（答案竟然是这样）

HTD型半圆弧齿同步轮尺寸参数槽型节距pb齿槽深hg齿槽圆弧半径R齿顶圆半角r1齿槽宽s两倍节顶距25齿形角3M31.280.910.26〜0.351.900.762〜14°5M52.161.560.48〜0.523.251.144〜14°8M83.542.570.78〜0.845.351.372〜14°14M146.204.651.36〜1.509.802.794〜14°20M208.606.841.95〜2.2514.804.320〜14°同步带轮的节圆直径计算：Dp=pxz/nDp:节径Z:齿数n：圆周率同步带轮实际外圆直径计算:De=Dp-2SDp:节径S:节顶距同步轮主要部位尺寸允差值同步轮节距公差Picthtoleranee(mm)带轮外径Outsidediameterpitch允差偏差Toleranee任意两相临齿间Distaneebetweentwoclosegears90弧内约允差Within90toleranee<25.400.03+0.05-0>25.40-50.800.03+0.08-0>50.80-101.600.03+0.10-0>101.60-177.800.03+0.13-0>177.80-304.800.03+0.15-0>304.80-508.000.03+0.18-0>508.000.03+0.20-0(mm)同步轮外径公差Toleraneeofoutisddimeterofpullet带轮外径Outsidedimeter允差Toleranee<25.40+0.05-0>25.40-50.80+0.08-0>50.80-101.60+0.10-0>101.60-177.80+0.13-0>177.80-304.80+0.15-0>304.80-508.00+0.18-0>508.00+0.2-0同步轮端面允许跳动量Allowablebouneeofpulleyend(mm)带轮外径Outsidediameterpitch允许跳动量Bounceoftoleranee<101.600.10>101.60-254.00带轮外径x0.001>254.000.25+[(带轮外径-254.00X0.005同步轮径向允许跳动量Allowablebounceofpulleywarpdirection(mm)带轮外径Outsidediameterpitch允跳值Bounceoftoleranee<203.200.13>203.200.13+(带轮外径-203.20X0.005产品展示ProductsShowSTD半圆弧齿槽平底型同步轮尺寸参数表型号节距pb齿高侧圆半径齿槽宽齿底角齿顶角S2M20.761.3251.300.10.19S3M31.111.9751.950.150.28S4.5M4.51.592.982.930.220.48S5M51.773.2753.250.250.55S8M82.835.305.200.40.9S14M144.959.289.100.71.6T型同步轮尺寸参数表形状形状yrbgrad2art型号节距SEbrNbrSEhgNhgPb偏差偏差偏差mix±max15°〈偏差T2.52.51.75+0.0501.83+0.0500.75+0.0501250.20.3+0.0500.6+0.05+0.05+0.05+0.05T55.02.963.321.251.95250.40.610000+0.1+0.1+0.1+0.1T1010.06.026.572.63.4250.60.820000+0.15+0.15+0.13+0.1T2020.011.6512.65.26250.81.230000产品展示ProductsShow梯形直边齿同步轮尺寸参数表型号节距pb齿槽底宽bw齿槽深hg齿槽角度屮土1.5°齿根圆角半径rb齿顶角半径rt2SMXL2.0320.84±0.050.69200.350.130.508XL5.0801.32±0.051.65250.410.640.508L9.5253.05±0.102.67201.191.170.762H12.704.19±0.133.05201.601.61.372XH22.2257.90±0.157.14201.982.392.794XXH31.75012.17±0.1810.31203.963.183.048