1. The problem statement, all variables and given/known data Already calculated: Tangential Forces : Pinion A=2850 N Gear B=2850 N Pinion C= 8550 N Gear D= 8550 N Radial Forces: Pinion A= 1000 N Gear B= 1000 N Pinion C= 9100 N Gear D= 9100 N Diameters: Pinion A= 60mm Gear B= 180mm Pinion C= 60mm Gear D= 200mm The distances between Gear B and Pinion C for the moment can be said to be X(mm). and the distance between the gears and bearings can be said to be Y(mm). 2. Relevant equations Moment = F*d 3. The attempt at a solution I've attached a picture of how the gears/shaft/bearings are arranged. My question is how do i calculate the shaft diameter(s) using the moment formula i know that i can calculate torque for each gear. It would just be the tangential force*the radius of the gear. I have no clue what to do with the radial loads or if I need to calculate any other forces. any help?