A Test Reseach on Static Bending Strength of Spheroidal Cast Iron Gears Zhu Xiaolu Lian Yizhi Yi Bingyue ABSTRACT In order to ensure that a certain degree of transmission accuracy, the remains deformation of gear teeth must be restricted within a certain range.In other words,the allo wable remains deformation depends on the accuracy of the transmission and the conditions under which the gear is working.Based on a large number of test results,the relationship bet ween remains deformation and static bending strength limit vas obtained as foilo Where a the gear bending stress at the moment when 1 um remains deformation is produced for unit module.K-a coefficient which is dependent on the material and its heat treatment method.o and K for spheroidal cast iron gears are shoun in this paper. 54， ， 凡一二 。 、 氮 一 。 “ ‘ 林 一 匆 份