W507ACombination Of C02 (Inner Ring With P5 Running Accuracy, Mark High And Low Points Of Eccentricity On Face Of Rings) And C04 (Outer Ring With P5 Running Accuracy, Mark High And Low Points Of Eccentricity On Face Of Rings) And W31 (Bearing Inspected To Certain Quality Control Requirements) And W33 (Lubrication Groove And Three Holes In Bearing Outer Ring) And W40I (Inner Ring Only Made Of Carburizing Grade Steel) And W40R (Rollers Only Made Of Carburizing Grade Steel) - (Offered On Tapered Bore Product; Superseded W534A). - The SuffiX W507A Is Supersedes By W906A
C08Heightened Running Accuracy To ISO Tolerance Class 5