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:
| 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:
| 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:
| 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:
| 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 |
