To calculate the maximum torque needed for failure of a serrated plate with 48 teeth made from stainless steel, one must determine the shear force required to break a tooth. The shear force can be calculated using material properties and geometry, specifically the tensile strength of stainless steel and the dimensions of the teeth. Once the shear force per tooth is established, the total torque can be derived by multiplying this force by the radius at which the force acts. The discussion highlights the importance of understanding both the material properties and the mechanical design to accurately assess failure points. Calculating these values is essential for ensuring the integrity of the serrated plates under load.