NSK single row deep groove ball bearings are classified into the types shown below.
The proper amount of good qualit grease is packed in shielded and sealed NSK ball bearings. A comparison of the features of each type is shown below.
| Type | Shielded type (ZZ type) |
Non-contact rubber sealed type (VV type) |
Contact rubber sealed type (DDU type) |
|---|---|---|---|
| Torque | Low | Low | HIgher than ZZ, VV types due to contact seal |
| Speed capability | Good | Good | Limited by contact seals |
| Grease sealing effectiveness | Good | Better than ZZ type | A little better than VV type |
| Dust resistance | Good | Better than ZZ type (usable in moderately dusty environment) | Best (usable even in very dusty environment) |
| Water resistance | Not suitable | Not suitable | Good (usable even if fluid is splashed on NSK bearing) |
| Operating temperature (1) | -10 to +110°C | -10 to +110°C | -10 to +100°C |
Note (1) The above temperature range applies to standard NSK bearings. By using cold or heat resistant grease and changing the type of rubber, the operating temperature range can be extended. For such applications, please contact NSK.
For NSK deep groove ball bearings, pressed cages are usually used. For big NSK bearings, machined brass canges are used. (Please refer to table below)
Machined cages are also used for high speed applications.
| Series | Pressed steel cages | Machined brass cages |
|---|---|---|
| 68 | 6800 - 6838 | 6840 - 68/800 |
| 69 | 6900 - 6936 | 6938 - 69/800 |
| 160 | 16001 - 16026 | 16028 - 16064 |
| 60 | 6000 - 6040 | 6044 - 60/670 |
| 62 | 6200 - 6240 | 6244 - 6272 |
| 63 | 6300 - 6332 | 6334 - 6356 |
NSK deep groove ball bearing nomenclature
please refer to: NSK bearing nomenclature.
1, Bearing type symbol
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
- 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. The CM clearance can be used in substitute of the CN clearance. (The opposite is not available.)
6, NSKHPSTM symbol
- &: NSKHPSTM bearings
7, Grease symbol
- NS7: NS HI-LUBE
NSKHPSTM deep groove ball bearings
Compared to the conventional bearing:
- Improved reliability
Bearing life has increased by a maximum of 2 times compared with that of conventional bearings by the optimization of the bearing's internal design and improvement of processing technology. As a result, the NSKHPSTM bearings contribute to reducing maintenance cost and facilitate the downscaling of related equipment. - New product line-up
The standard dimensions are the same as for the standardsize bearings, NSK has expanded the line-up of NSKHPSTM bearings fousing on a wide range of sizes offering a high degree of versatility for various general-purpose applications.