The suffix used in SKF single row angular contact ball bearings has the following meanings:

Contact Angle 30 ° AC: Contact Angle 25 ° B: Contact Angle 40 ° CA: General purpose distribution bearing, when back-to-back or face to face configuration, axial clearance is less than that of ordinary group (CB)CB: General purpose distribution bearing, when back-to-back or face to face configuration, axial clearance is less than that of ordinary group CC: General distribution group of bearings, back to back in the nc machine program or face to face configuration, common set of CC: general distribution group of bearings, when face to face with the back to back or configuration, configuration in back to back or face to face, with light preloaded GB: general distribution group of bearings, in back to back or configuration, face to face with a preloaded GC: general distribution group of bearings, when face to face with the back to back or configuration, GA with heavy preload: General purpose assembly bearing, with light preload Y: window type stamped brass cage, ball guide 6,6 cage, for NC machine spindles back-to-back or face to face configuration;

2. The suffix used for SKF double row angular contact ball bearings is as follows:

No ball notch CB: specific axial clearance C2: axial clearance C3: axial clearance less than normal group C3: axial clearance greater than normal group D: split inner ring HT51: high-temperature grease, temperature range from -30 to +175 degrees J1: pressed steel cage, steel ball guide M: machine cut brass cage, steel ball guide MA: Machine cut brass cage, outer ring guide MT33: Lithium based grease, temperature range -30 to +120 degrees N: outer ring with stop slot NR: outer ring with stop slot P5: Dimensions and rotary CNC machine precision to ISO tolerance class 5P6: Dimensions and rotation accuracy in accordance with ISO tolerance class 6P6+C2P63:P6+C2T63:P3TN9:PS1: ball guide, ball guide, steel frame butadiene nitrile rubber sealing ring on both sides 2Z: stamping steel dust cover on both sides.