SIFT BEARING STORE CATALOG

7308BNSKBall

7308B is a NSK ball bearing, bore 40 mm, O.D. 90 mm, width 23 mm, dynamic rating 9,480 lbs. Dimensions, drawing, interchanges and price.

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Bore d40mm
Outside dia. D90mm
Width B23mm
Dynamic Cr9,480lbs
Static C0r6,240lbs
Limiting speed6,300rpm
Weight0.658kg
Cr / C0r1.52
Mean dia. dm65mm

Original catalogue drawing - NSK catalogue, page 39

7308B NSK Ball bearing catalogue drawing

Scanned from the manufacturer catalogue page listing this part number. All part numbers printed on that table share the same drawing.

Scale cross-section

DdBOutside dia. D90 mmBore d40 mmWidth B23 mm

Blue = inner / outer ring, yellow = rolling element. Drawn to scale from this part's own dimensions for selection reference only - not a manufacturing or assembly drawing.

Dimension table (mm / inch)

SymbolDimensionmminch
dBore diameter401.5748
DOutside diameter903.5433
BInner-ring / bearing width230.9055
rChamfer (min)1.4990.059

Notes

Weights are given in kg. Load ratings are shown in both the original catalogue units and the converted value (1 N = 0.2248 lbf). Data is provided for selection reference only - confirm against the latest official catalogue before ordering.

Main dimensions

Bore d (mm)40
Bore d (in)1.5748
Outside dia. D (mm)90
Outside dia. D (in)3.5433
Width B (mm)23
Width B (in)0.9055

Load ratings & speeds

Basic dynamic load rating Cr (lbs)9480
Basic static load rating Cor (lbs)6240
Limiting speed - grease (rpm)6,300
Limiting speed - oil (rpm)8,500

Weight

Weight (kg)0.658

Mounting dimensions (fillets / shoulders)

Chamfer r (in)0.059
Shaft shoulder da min (in)1.909
Housing shoulder Da max (in)3.209

Bearing life (ISO 281 basic rating life)

C / PEquivalent load P (N)L10 (106 rev)L10h at 2,100 rpm
410,54264508
67,0282161,714
85,2715124,063
104,2171,0007,937
152,8113,37526,786

Basic rating life per ISO 281: L10 = (C/P)3 with C = 42,169 N. Hours = L10 x 106 / (60n). Life-modification factors for lubrication, contamination and temperature (aISO) are not included.

Source & traceability

BrandNSK
Source catalogueNSK inch product catalogue
Catalogue pagep.41 (dimensions) / p.42 (ratings)

Dimensions in inches and millimetres, load ratings in lbs.

Interchange - same dimensions, other brands

DesignationBrandTypedDB/TDyn. ratingkg
1308-K-TVH-C3FAGBall40902330 kN0.698
1308-TVHFAGBall40902330 kN0.708
6308FAGBall40902342.5 kN0.64
6308-2RSRFAGBall40902342.5 kN0.654
6308-2ZFAGBall40902342.5 kN0.654
6308-CFAGBall40902347 kN0.6
6308-C-2BRSFAGBall40902347 kN0.654
6308-C-2HRSFAGBall40902347 kN0.622
6308-C-2ZFAGBall40902347 kN0.617
QJ308-TVPFAGBall40902386.5 kN0.695

Same dimensions, same brand

DesignationBrandTypedDB/TDyn. ratingkg
1308NSKBall4090236,520 lbs0.744
6308NSKBall4090239,160 lbs0.635
BL308NSKBall40902312,300 lbs0.667
308NSKCylindrical Roller40902313,200 lbs0.653
NU308ENSKCylindrical Roller409023102 kN0.747
21308EAE4NSKSpherical Roller409023118 kN0.73
HR30308NSKTapered Roller409023111 kN0.758
HR30308CNSKTapered Roller40902319,000 lbs0.717

Nearby bore sizes

DesignationBrandTypedDB/TDyn. ratingkg
1208NSKBall4080184,340 lbs0.417
1308NSKBall4090236,520 lbs0.744
16008NSKBall4068913.9 kN0.13
2208NSKBall4080237,080 lbs0.49
2308NSKBall40903310,100 lbs0.998
3208JNSKBall408030.29,290 lbs0.653
3308JNSKBall409036.513,100 lbs1.066
5208JNSKBall408030.29,930 lbs0.572

Request a quotation for 7308B

Send us the quantity you need and we will come back with price and lead time, normally within 24 hours. Equivalent parts from other brands can be quoted at the same time.