NSK single-row deep groove ball bearings are the most common type of rolling bearings. Their use is very widespread. So, our stock has more than 360 kinds of NSK deep groove ball bearing number,including open,zz,ddu,vv. In addition to open type bearings, NSK deep groove ball bearings often have steel shields or rubber seals installed on one or both sides and are prelubricated with grease. Also, snap rings are sometimes used on the periphery. As to cages, pressed steel ones are the most common. For NSK big deep groove ball bearings, machined brass cages are used. Machined cages are also used for high speed applications.
The proper amount of good quality grease is packed in shielded and sealed ball bearings. A comparison of the features of each deep groove ball bearings in 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 bearing) |
| Operating temperature | -10 -- +110°C | -10 -- +110°C | -10 -- +110°C |
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Related numbers
NSK 6204VV bearing
20mm x 47mm x 14mm
NSK 6205DDU bearing
25mm x 52mm x 15mm
NSK 6022ZZ bearing
110mm x 170mm x 28mm
NSK 6210ZZ bearing
50mm x 90mm x 20mm
NSK 6211ZZ bearing
55mm x 100mm x 21mm
NSK 6212ZZ bearing
60mm x 110mm x 22mm
NSK 6305ZZ bearing
25mm x 62mm x 17mm
