In this study, three disk shrink fit assembly (solid shaft-sleeve-holder) was modeled by finite element method to determine the effects of the interference or shrinkage allowance on interference or interfacial pressure. Stress distributions along the thickness were plotted. The highest stresses were observed at the inner surface of the holder. Solid shaft had a uniform stress distribution. Sleeve and holder had non uniform stress distributions, which were higher at the inner surface and lower at the outer surface. Higher stresses can be reduced by lowering the interference between the sleeve and the holder. Equal interfacial pressures between disks can be accomplished using different interferences. It was concluded that finite element simulation is the only solution for complex geometry and various loading conditions.Key Words: Shrink fit, Shrink fit assembly, Interference fit, Three disk shrink fit.