X2=(C-SKF)=15° Contact Angle. TA=One Piece Outer Ring Centred Machined Laminated Phenolic. DUM=(DM-Ax. Int. Cl/Pr Segment)/(DGB-SKF)=Set Of 2 Universal Bearings, Medium Preload. EP5=ABEC5=(P5-SKF)=Dimensional And Running Accuracy To ISO Toleranc