BRIEF DESCRIPTION OF THE DRAWINGS [0005]FIG. 1 is a perspective partially cutaway view of a planetary gear system. [0006]FIG. 2 is an elevation view of a face of a toothed portion of a planet gear. [0007]FIG. 3 is a cross-sectional view of the toothed portion of the planet gear of FIG. 2 taken along section line 3-3. [0008]FIG. 4 is an elevation view of a face of a hub of a planet gear. [0009]FIG.