thank you Chris for this nice explanation, so we can say the radial is due to weight or weight transfer and the axial is a force that sort of try to push the bearing out of the axial ?ChrisDanger wrote:Ah, right. That's hard to explain. It may be best to imagine you're sitting at the corner of the car holding the axle with a bearing in each hand (for a two-bearing hub). So I suppose you are the hub, and for now ignore the suspension and imagine you're fixed to the car. Now, with the car stationary, you have to only support the weight. You will have to apply a moment on the axle by applying radial forces on each bearing. There should be examples in Shigley of this type of arrangement, where the wheel is effectively applying a vertical force at the end of the axle equal to the weight at that corner. If you accelerate, and you're at a rear corner, you will have a radial force pushing the axle forwards, so the force on the bearing will still be radial but more horizontal now. Under braking this force will be radially backwards. Under lateral acceleration (i.e. cornering) you'll see some axial force as your tires push the car sideways and this force is transmitted by pushing the axle along its length, but also the radial forces will change too as the weight effectively changes.
Let me know if that helps.
and about axial it's just created on the corners ?
