齿轮各项公差的数值表

中心距极限偏差（±a）直mm第II公差组精度等级5〜67〜89〜10齿轮副的中心距mmfa大于到IT7IT8IT96107.511181018913.521.5183010.516.526305012.519.53150801523378012017.52743.51201802031.550180250233657.52503152640.56531540028.544.57040050031.548.577.5500630355587630800406210080010004570115100012505282130125016006297150公法齿厚极限偏差公法C=+1fPtG=-6fPtL=-16fPtR=-40fPtD=0H=-8fPtM=-20fPtS=-50fPtE=-2fPtJ=-10fPtN=-25fPtF=-4fPtK=-12fPtP=-32fPt注：对外啮合齿轮，公法线平均长度上偏差Ewms=ESScosa－0.72Frsina公法线平均长度公差Ewm=TS线平均长度下偏差Ewmi=ESicosa+0.72Frsina公法线平均长度公差Ewm=TScosa－1.44Frsina接触斑点接触斑点精度等级5678910按高度不小于％555045403025

(45)(40)(35)(30)按长度不小于％807060504030齿圈径向跳动公差(Fr)直mm分度圆直径mm法向模数mm精度等级大于到5678910—1251〜3.51625364571100〉3.5〜6.31828405080125〉6.3〜1020324556901401254001〜3.52236506380112〉3.5〜6.325405671100140〉6.3〜1028456380112160〉10〜16325071901251804008001〜3.528456380100125〉3.5〜6.332507190112140〉6.3〜10365680100125160〉10〜1640639011216020080016001〜3.532507190112140〉3.5〜6.3365680100125160〉6.3〜10406390112140180〉10〜164571100125160200径向综合公差值(Fi")mm分度圆直径mm法向模数mm精度等级大于到56789101〜3.52236506390140—125〉3.5〜6.325405671112180〉6.3〜10284563801252001〜3.532507190112160〉3.5〜6.3365680100140200125400〉6.3〜10406390112160224>10〜1645711001251802501〜3.5406390112140180〉3.5〜6.34571100125160200400800〉6.3〜105080112140180224>10〜165690125160224280

1〜3.54571100125160200〉3.5〜6.350801121401802248001600〉6.3〜105690125160200250>10〜1663100140180224280齿形公差（Ff值mm分度圆直径mm法向模数mm精度等级大于到56789101〜3.56811142236—125〉3.5〜6.371014203250〉6.3〜10812172236561〜3.57913182845〉3.5〜6.381116223656125400〉6.3〜1091319284571>10〜161116223250801〜3.591217254063〉3.5〜6.3101420284571400800〉6.3〜10111624365690>10〜1613182640631001〜3.5111724365690〉3.5〜6.313182840631008001600〉6.3〜101420304571112>10〜161522345080125齿距极限偏差（±Pt值mm分度圆直径mm法向模数mm精度等级大于到56789101〜3.561014202840—125〉3.5〜6.381318253650〉6.3〜10914202840561〜3.571116223245〉3.5〜6.391420284056125400〉6.3〜10101622324563>10〜161118253650711〜3.581318253650400800〉3.5〜6.391420284056〉6.3〜10111825365071

>10〜161320284056801〜3.591420284056〉3.5〜6.31016223245638001600〉6.3〜10111825365071>10〜16132028405680基节极限偏差(±fPb)值mm分度圆直径mm法向模数mm精度等级大于到56789101〜3.55913182536一125〉3.5〜6.371116223245〉6.3〜10813182536501〜3.561014203040〉3.5〜6.381318253650125400〉6.3〜1091420304060>10〜161016223245631〜3.571116223245〉3.5〜6.381318253650400800