NSK Deep Groove Ball Bearings 6305 ,Single-Row D=25

SKU: 6305

$6.78

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NSK Deep Groove Ball Bearings 6305 ,Single-Row  D=25

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
6305 25 62 17 1.1 20.6 11.2 11000 13000 13.2 0.235


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. 

 

 

□Formulation of Bearing Designations

Single-row deep groove ball bearings

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.

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