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A rolling bearing is generally composed of an inner ring, an outer ring, a set of rolling elements and a cage. Bearings are generally classified into radial bearings and thrust bearings depending on direction of load. In addition, they can also be classified into ball bearings and roller bearings depending on the type of rolling elements and then further segregated by their different designs or specific purpose. The following tables show the various classifications and corresponding series codes.


Ball and roller bearing classification Bearing series code
Ball bearings Radial ball bearings Deep groove ball bearings 160xx,161xx, 60xx, 618xx, 62xx, 622xx, 623xx, 63xx, 64xx, 68xx, 69xx.
Max. capacity type DGBB 2xx, 3xx
Angular contact ball bearings 70xx, 719xx, 72xx,.
Duplex angular contact
                     ball bearings
70xx, 719xx, 72xx.
Double row angular contact
                    ball bearings
32xx, 33xx.
Four-point contact ball
QJ 2xx, QJ 3xx.
Self-aligning ball bearings 12xx, 13xx, 22xx, 23xx, 112xx, 113xx.
Thrust ball bearings Thrust ball bearing 511xx, 512xx, 513xx, 514xx,
 Thrust ball bearing with
                      seating ring
532xx, 533xx.
 Double direction thrust
                       ball bearings
522xx, 523xx.
 Double direction thrust ball
                      bearings with seating rings
542xx, 543xx.
Double direction angular
                     contact thrust ball bearings
7602xxx, 7603xxx, 2344xxx, 2347xxx.
Roller bearings Radial roller bearings   Cylindrical roller bearings NU10xx, NU19xx, NU2xx, NU22xx, NU23xx, NU3xx, NJ2xx, NJ22xx, NJ23xx, NJ3xx, NUP2xx, NUP22xx, NUP23xx, NUP3xx, N2xx, N3xx.
 Double row cylindrical roller
  Needle roller bearings NA48xx, NA49xx, see table below
Tapered roller bearings 302xx, 303xx, 313xx, 320xx, 322xx, 323xx, 329xx, 330xx, 331xx, 332xx.
 Double row tapered roller
302xx, 313xx, 320xx,322xx. 
Spherical roller bearings 213xx, 222xx, 223xx, 230xx, 231xx, 232xx, 233xx, 239xx, 240xx, 241xx. 
Thrust roller bearings  Cylindrical roller thrust bearings 811xx, 812xx.
Needle roller thrust bearings see table below
Tapered roller thrust bearings 350xxx, 351xxx, 353xxx. 
Spherical roller thrust
292xx, 293xx, 294xx.


Needle Roller Bearing Classification Bearing numbers and sectional view
Drawn cup needle roller bearings Caged type
Full complement type
Radial needle and cage assemblies
Needle roller bearings With ribs
Without ribs
Full complement
Yoke type track rollers Without axial guidance
With axial guidance
Stud type track rollers With axial guidance
Combined radial axial bearings Needle roller angular contact ball
Needle roller axial cylindrical roller
Needle roller axial ball
Inner race
Axial bearings Axial needle roller and cage assembly
Axial cylindrical roller and cage assembly
Axial bearing washers Shaft locating washers
(AS, WS811)

Housing locating washers (GS81)


Bearing washers (LS)

Center washers (ZS)




Last modified : 30 October 2002

Motion Bearings Pte. Ltd.
131 Kaki Bukit Ave 1, Shun Li Industrial Park, Singapore 416000.
Tel : +65-6844 5411       Fax : +65-6844 2377