Abstract— An areca thresher machine will be developed to meet the need for appropriate technology in areca farmers. One of the critical points in this machine's design was related to the wire loop tooth and the shaft of the areca thresher machine used in the machine. As far as we know, studies related to the type of wire loop tooth material and the shaft of the areca thresher machine have not been carried out. Therefore, this paper investigates the effect of the type of wire loop tooth material and the shaft of the areca thresher machine on stress, strain, and displacement of the areca thresher shaft. The materials tested were 1023 carbon steel sheet (SS), ductile iron, and balsa wood. The method used in this research is a simulation using the finite element method (FEM) approach. The results show that the type of ductile iron material is the best material for the wire loop tooth and the shaft of the areca thresher machine considering the material's strength. Besides that, if you consider the mass and price of the wire loop tooth material and the shaft of the areca thresher machine, the balsa type material is the best.