Bearing Selection:Normal design practice is to select a bearing with a length equal to 4 times the shaft diameter.It may be acceptable to deviate from this rule when application load requirements permit the use of shorter bearing lengths. * Slimline Bearing.Bearing area is: Bearing I.D. (shaft diameter) multiply x bearing length. Loading capability is determined by:Multiplying that bearing area x 35 psi.Example: (RAY)- 3" shaft dia. x 12" length 36 sq. Inch bearing area x 35 psi 1,260 lbs. Is bearing load capacity