NSK Deep Groove Ball Bearings 6804ZZ ,Single-Row D=20
|Basic Load Ratings
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
|Rubber Non-Contact Seal
|Rubber Contact Seal
||Higher than ZZ and VV types
due to contact seal
| Speed capability
||Limited by contact seals
| Grease-sealing effectiveness
||Better than ZZ type
|| Slightly better than VV type
| Dust resistance
||Better than ZZ type (usable in moderately dusty environments)
||Best (usable even in very dusty environments)
| Water resistance
||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.
□Formulation of Bearing Designations
Single-row deep groove ball bearings
||6 : Single-row deep groove ball bearings
||2 : 02 Series, 3 : 03 Series, 9 : 19 Series, 0 : 10 Series
||Less than 03, Bearing bore 00 : 10mm, 01 : 12mm, 02 : 15mm, 03 : 17mm
Over 04, Bearing bore bore number X 5 (mm)
||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
||Omitted : CN clearance＊1, C3 : Clearance greater than CN, C4 : Clearance greater than C3, CM : For electric motors＊1
||& : NSKHPSTM Bearings
||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.
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Damages and issues
Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item, so that we can evaluate the issue and make it right.
Exceptions / non-returnable items
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