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[[File:小模数齿 轮轮1.jpg|缩略图|[[https://baijiahaoimage.baidu.com/search/detail?ct=503316480&z=0&ipn=d&word=%E5%B0%8F%E6%A8%A1%E6%95%B0%E9%BD%BF%E8%BD%AE%20%20%20%E6%90%9C%E7%8B%90&step_word=&hs=0&pn=1&spn=0&di=26070&pi=0&rn=1&tn=baiduimagedetail&is=0%2C0&istype=2&ie=utf-8&oe=utf-8&in=&cl=2&lm=-1&st=-1&cs=2657215447%2C4210704434&os=1206874871%2C2169502395&simid=3295036955%2C278865485&adpicid=0&lpn=0&ln=404&fr=&fmq=1632309926713_R&fm=result&ic=&s?id=1694265086605630906undefined&hd=&latest=©right=&se=&sme=&tab=0&width=&height=&face=undefined&ist=&jit=&cg=&bdtype=0&oriquery=&objurl=https%3A%2F%2Fgimg2.baidu.com%2Fimage_search%2Fsrc%3Dhttp%3A%2F%2F5b0988e595225.cdn.sohucs.com%2Fimages%2F20190425%2F74a030037fcf4783994bdacdcac8e891.jpeg%26refer%3Dhttp%3A%2F%2F5b0988e595225.cdn.sohucs.com%26app%3D2002%26size%3Df9999%2C10000%26q%3Da80%26n%3D0%26g%3D0n%26fmt%3Djpeg%3Fsec%3D1634902172%26t%3D1ddf5142100113feca2c0559586ab7f6&fromurl=ippr_z2C%24qAzdH3FAzdH3Fooo_z%26e3Bf5i7_z%26e3Bv54AzdH3FwAzdH3Fn8adalacb_8aa8b8aaa&gsm=2&rpstart=0&rpnum=0&islist=&wfrquerylist=spider&fornojc=pc undefined 原图链接][https://www.sohu.com/a/310209058_100181000 来自 天孚微电机搜狐]]]
'''小模数齿轮'''是指模数小于或者等于1的齿轮。在航空机械、电子产品、[[精密机械]]、仪器仪表和计时机构中，广泛应用小模数齿轮。小模数齿轮的加工方法，其基本原理与大、中模数齿轮的加工原理相同。
== 齿轮模数的定义 ==