Corn seeds of single hybrid BR 201 female were shelled with diferent feeding rates and severals moisture contents. It was analysed mechanical damage, germination and vigor immediately and after storage. The results showed that threshing seeds with a thresher machine D?Andrea model 10 HP there was no effect of feeding rate on seed quality and the germination and vigor were less affected when the seeds were threshed with low moisture content, the threshing should be made when the seeds reach moisture between 10 and 15% and the mechanical damage reduced drastically seed quality during storage.