If a grease with a higher viscosity than what is called for is used in a spherical roller bearing with a 4 7/16 bore turning at 1785 rpm, would it create more heat and if so how much? The grease I am using is mineral oil and has a 320 cSt base oil. The bearings already operate in an area that has 120 degrees ambiant air temps and the bearing temperatures are from 180 to 200 degrees. I am not sure it is the best choice of grease. Thanks for the help.
