Excavator specialized angular ball bearing are used for the appliexcavatorion of excavator machiner .This kind of angular contact ball bearing has big contact angle(40 degree),so can under take big axial load ,and aslo axial radial allied load .Moreover it can carry heavier load capacity than the same size bearings because it has more balls inside .It is widely used for all imported exavator.High-accuracy, low-noise, longlife and this kink of bearing are widely used in excavator