Bearing Type Control

Bearing model meaning ------ bearings are 0-9 (no class 5)

Category 0: Double-row angle contact ball bearing (usually omitted) Example: (0)3204A

Category 1: Self-adjusting ball bearing example: 1201ETN9

Category 2: Spherical roller bearings, spherical roller thrust bearings example: 22209E29328E

Category 3: Conical roller bearing example: 32016X/Q

Category 4: Double-row deep-groove ball bearing example: 4206ATN9 deep trench ball bearing size

Category 5: Thrust ball bearing example: 51100

Category 6: Deep groove ball bearing example: 6213-2Z

Category 7: Angle contact ball bearing example: 7305BECBM

Category 8: Cylindrical roller thrust bearing example: 81111TN

Class N: The second, sometimes third, letter of a cylindrical roller bearing, used to determine the flange structure, e.g. NJ, NU, NUP;

Example: NU2317ECJ

Category C: CARB Bearing C2205

QJ class: four-point contact ball bearing example: QJ217MA.