Description
NSK Deep Groove Ball Bearings 6302ZZ ,Single-Row D=15
Bearing Numbers |
Boundary Dimensions (mm) |
Basic Load Ratings (kN) |
Limiting Speeds (min-1) |
Factor f0 |
Mass (kg) approx. |
d |
D |
B |
r min. |
Cr
|
C0r
|
Grease |
Oil |
6302ZZ |
15 |
42 |
13 |
1 |
11.4 |
5.45 |
17000 |
|
12.3 |
0.083 |
DESIGN, TYPES, AND FEATURES
SINGLE-ROW DEEP GROOVE BALL BEARINGS
Single-row deep groove ball bearings are classified into the types shown below.
The proper amount of good quality grease is packed in shielded and sealed ball bearings. A comparison of the features of each type is shown in Table 1.
Table 1 Features of Sealed Ball Bearings
Type |
Shielded (ZZ Type) |
Rubber Non-Contact Seal (VV Type) |
Rubber Contact Seal (DDU Type) |
Torque |
Low |
Low |
Higher than ZZ and VV types due to contact seal |
Speed capability |
Good |
Good |
Limited by contact seals |
Grease-sealing effectiveness |
Good |
Better than ZZ type |
Slightly better than VV type |
Dust resistance |
Good |
Better than ZZ type (usable in moderately dusty environments) |
Best (usable even in very dusty environments) |
Water resistance |
Not suitable |
Not suitable |
Good (usable even if fluid is splashed on bearing) |
Operating temperature |
–10 to +110 °C |
–10 to +110 °C |
–10 to +110 °C |
Note (1) The above temperature range applies to standard bearings. By using cold- or heat-resistant grease or changing the type of rubber, the operating temperature range can be extended.
![](https://cdn.shopify.com/s/files/1/0551/2557/3819/files/1-2.png?v=1644564840)
□Formulation of Bearing Designations
Single-row deep groove ball bearings
![](https://cdn.shopify.com/s/files/1/0551/2557/3819/files/1-1.png?v=1644562248)
①Bearing type |
6 : Single-row deep groove ball bearings |
②Dimension Series |
2 : 02 Series, 3 : 03 Series, 9 : 19 Series, 0 : 10 Series |
③Bore number |
Less than 03, Bearing bore 00 : 10mm, 01 : 12mm, 02 : 15mm, 03 : 17mm Over 04, Bearing bore bore number X 5 (mm) |
④Seals/shields |
ZZ : Shield on both sides, DDU: Rubber contact seal on both sides, VV: Rubber non-contact seal on both sides, Z: Shield on one side, DU: Rubber contact seal on one side V:Rubber non-contact seal on one side |
⑤Internal clearance |
Omitted : CN clearance*1, C3 : Clearance greater than CN, C4 : Clearance greater than C3, CM : For electric motors*1 |
⑥NSKHPS designation |
& : NSKHPSTM Bearings |
⑦Grease designation*2 |
NS7 : NS HI-LUBE |
*1 CM clearance may be used instead of CN clearance (the reverse is not possible).
*2 The grease designation is required when seals/shields are used on both sides.
NSKHPS™ Deep Groove Ball Bearings
Note (1) The above temperature range applies to standard bearings. By using
cold- or heat-resistant grease or changing the type of rubber, the operating temperature range can be extended.
Compared with conventional bearings:
● Improved reliability
Bearing life is 15% longer than conventional bearings thanks to optimization of the bearing’s internal design and improvement of processing technology. As a result, NSKHPS™ bearings contribute to reducing maintenance costs and facilitate the downscaling of related equipment.
● New product lineup
The standard dimensions are identical to standard size bearings. NSK has expanded the lineup of NSKHPS™ bearings by focusing on a wide range of sizes offering a high degree of versatility for various general-purpose applications.