By measuring the fruit physical and mechanical properties in both penetrate and compression tests, we can estimate the fruit ripeness and also study the fruit arrangement in ambient boxes to reduce the mechanical damages. In this study the effects of fruit size and load direction were investigated on some bergamot physical andmechanical properties. Strength properties of fruit were obtained by puncture and uni-xialcomperessiontest, with constant loading speed of 10mm/min. The experiment was performed as a factorial test based on completely randomized design. The results of analysis showed that the increasing in fruit size, was led to increase in fruit rind ratiowhile the moisture content was decreased. The fruit density was not affected by fruit size. In addition, according to the results, the fruit size effected on puncture energy, puncture force, rupture deformation and rupture hardness, significantly. The effect of load direction was significant on all mechanical properties except rupture force and rupture hardness. Themean values of puncture force for small, medium and large sizesof bergamot fruits were equal to 27.24N, 35.13N and 43.04N, respectively.

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