Preloading Needle Thrust Bearing TC411?
I have an assembly where I am stacking up two of these bearings and, in order to take up the stack tolerance I am using a Belleville washer which applies 30 lbs of force to the stack. When I do this, the bearings feel gritty when I spin the shaft. Since the bearing can handle a dynamic load of over 1000 lbs, I did not expect them to run rough with just 30 lbs of force. Is there a recommended preload for these bearings?