How to Attach Gears, Sprockets and Pulleys to Shafts ...
Where Area is the surface area between the shaft and the pulley, d is the shaft diameter, L is the overlap length for the shaft and pulley, F is the internal shear force between the shaft and pulley, S s is the shear strength of the adhesive, and T is the applied (or maximum torque).. Using an average adhesive shear strength of 1000 psi, a diameter of 0.19 in, and overlap length of 0.38