C=Two-Piece Pressed Steel Cage With Guide Ring. K=Tapered Bore, Taper 1:12. E4=(W33-SKF)=Lubrication Groove And Three Holes In Bearing Outer Ring. C3=INTERNAL CLEARANCE LARGER THAN NORMAL. S11=(S1-SKF)=INNER AND OUTER RING HEAT STABILIZED TO 200°