Hi Omar,nI recommend you change this to a Static Structural model to solve the contact forces and stresses. You can include a Rotational Velocity load to add the inertia forces from the 100 rpm, though they are almost negligible compared with the contact forces. nYou can have Static Structural solve this at a range of rotational angles and tilt angles.nIf you get convergence difficulties in Static Structural, you can try Explicit Dynamics.nRegards,nPetern