NSK ball bearing nomenclature

The nomenclature of NSK ball bearings follow a bearing designation system. When order a NSK ball bearing, you need to provide the bearing number that may consist of combination of letters and numbers. For more information, refer to NSK bearing nomenclature.

We introduct the nomenclature of each type of NSK ball bearing below.

NSK deep groove ball bearings

NSK number example:
NSK deep groove ball bearing nomenclature

1 Bearing type symbol 6: Single-row deep groove ball bearings
2 Dimension symbol 2: 02 Series
3: 03 series
9: 19 series
0: 10 series
3 Bore number

Less than 03, Bearing bore 00: 10mm, 01: 12mm, 02: 15mm, 03: 17mm

over 04, Bearing bore bore number x 5 (mm)

4 Seals, Shields symbol ZZ: Shield on Both side
DDU: Contact rubber seal on both side (for example: NSK 6203DDU bearing)
VV: Non-contact rubber sealed on both side
5 Internal clearance symbol Omitted: CN clearance
C3: Clearance greater than CN
C4: clearance greater than C3
CM: for electric motors
6 NSKHPS symbol &: NSKHPS bearings
7 Grease symbol NS7: NS HI-LUBE

NSK angular contact ball bearings

NSK single row angular contact ball bearing matched angular contact ball bearings. Bearing number example:
NSK single row angular contact ball bearings nomenclature

1 Bearing type symbol 7: Single-row angular contact ball bearings, Matched angular contact ball bearings
2 Dimension symbol 2: 02 Series
3: 03 series
9: 19 series
0: 10 series
3 Bore number

Less than 03, Bearing bore 00: 10mm, 01: 12mm, 02: 15mm, 03: 17mm

over 04, Bearing bore bore number x 5 (mm)

4 Contact angle symbol C: 15°, A5: 25°, A: 30°, B: 40°
5 Internal design symbol EA: High load capacity
6 Cage symbol W: pressed steel cage
MR: machined brass cage (ball guided)
No symbol: Machined brass cage (outer ring guided)
TYN: polyamide resin cage
T85: polyamide 46 resin cage
T7: L-PPS resin cage
7 arrangement symbol SU: universal arrangement
DU: universal arrangement
DB: Back-to back arrangement
DF: face-to-face arrangement
DT: Tandem arrangement
8 Preload symbol
Axial internal clearance symbol
EL: Extra light preload, L: light preload, M: medium preload, H: heavy preload
Omitted: CN clearance, C3: Clearance greater than CN, C4: clearance greater than C3
CNB: CN clearance equivalent (universal arrangement)

NSK double row angular contact ball bearings, bearing number example:
NSK double row angular contact ball bearing number example

1 Bearing type symbol 5: Double row angular contact ball bearings
2 Dimension symbol 2: 02 Series
3 Bore number

Less than 03, Bearing bore 00: 10mm, 01: 12mm, 02: 15mm, 03: 17mm

over 04, Bearing bore bore number x 5 (mm)

NSK four-point contact ball bearings, bearing number example:
NSK four-point contact ball bearing nomenclature

1 Bearing type symbol QJ: four-point contact ball bearings
2 Dimension symbol 10: 10 Series
2: 02 series
3: 03 series
3 Bore number

Less than 03, Bearing bore 00: 10mm, 01: 12mm, 02: 15mm, 03: 17mm

over 04, Bearing bore bore number x 5 (mm)

4 Cage symbol M: machined brass cage
5 Internal clearance symbol Omitted: CN clearance
C3: Clearance greater than CN
C4: clearance greater than C3
C2: Clearance less than CN

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