... catalog:Deep groove ball bearing,Angular contact bearing,Self-aligning bearing,Cylindrical roller bearing,Spherical roller bearing, Taper roller bearing,Needle roller bearing,Block pillow bearing, Auto bearing Retainer:copper ... is 1:12K30: Tapered bore bearing,the taper is 1:30W33: With lubrication groove in outer ring,with three oil holesC2/C3/C4 ...