Was hoping to get some help and calcification. I am a Mechanical engineering student and I am designing a rear differential spool for the school's FSAE car. Im trying to calculate the max torque the spool (and bolts) can handle based of the design and materials used. Also the amount of shear the bolts are under given the cars last dyno was 55 lb-ft of torque. I before they shut down school I had talked with a couple professors and gotten mixed answers and formulas. I have since tried email and zoom and still getting mixed results. I will try and include as much info as possible. Any help is greatly appreciated Car torque 55 lb ft max Bolts 5/16-18 UNC ASTM A574 standard 170,000 psi tensile 153,000 psi yield 140,000 psi proof Fit pin 5/16 harden steel approx 16,000 pound break strength Spool Al 7075-T6511 86,000 psi tensile 76,300 psi yield
