A simulation approach for loaded tooth contact analysis is presented.Deformation of the tooth

deflection of the supporting system

backlash between the teeth

gaps on points except temporary contact point

manufacturing and assembling errors are considered.In this procedure

the accurate geometry resulted from TCA is foundation of whole calculation

and the flexibility factor matrix by using finite element method is adopted.Besides

the non-linear contact analysis between multi-pairs of teeth can be done only through the mechanical and geometrical analyses of single-pair of teeth.