SIFT BEARING STORE CATALOG

7238A5NSKPrecision / Angular Contact

7238A5 is a NSK precision / angular contact bearing, bore 190 mm, O.D. 340 mm, width 55 mm. Dimensions, drawing, interchanges and price.

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Bore d190mm
Outside dia. D340mm
Width B55mm
Dynamic Cr73,900lbs
Static C0r95,900lbs
Limiting speed3,000rpm
Weight22.303kg
Cr / C0r0.77
Mean dia. dm265mm

Original catalogue drawing - NSK catalogue, page 197

7238A5 NSK Precision / Angular Contact 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. D340 mmBore d190 mmWidth B55 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 diameter1907.4803
DOutside diameter34013.3858
BInner-ring / bearing width552.1654

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)190
Bore d (in)7.4803
Outside dia. D (mm)340
Outside dia. D (in)13.3858
Width B (mm)55
Width B (in)2.1654

Load ratings & speeds

Basic dynamic load rating Cr (lbs)73900
Basic static load rating Cor (lbs)95900
Limiting speed - grease (rpm)3,000
Limiting speed - oil (rpm)4,300

Weight

Weight (kg)22.303

Mounting dimensions (fillets / shoulders)

Fillet ra (in)0.118
Fillet rb (in)0.059
Shaft shoulder da (in)8.189
Housing shoulder Da (in)12.677
Housing shoulder Db (in)13.031

Bearing life (ISO 281 basic rating life)

C / PEquivalent load P (N)L10 (106 rev)L10h at 1,000 rpm
482,181641,067
654,7872163,600
841,0905128,533
1032,8721,00016,667
1521,9153,37556,250

Basic rating life per ISO 281: L10 = (C/P)3 with C = 328,724 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.199 (dimensions) / p.200 (ratings)

Dimensions in inches and millimetres, load ratings in lbs.

Interchange - same dimensions, other brands

DesignationBrandTypedDB/TDyn. ratingkg
6238-MFAGBall19034055255 kN22.6
QJ238-N2-MPAFAGBall19034055455 kN23.8
N238-E-M1FAGCylindrical Roller19034055680 kN22.8
NJ238-E-M1FAGCylindrical Roller19034055680 kN23.2
NU238-E-M1FAGCylindrical Roller19034055680 kN22.8
NUP238-E-M1FAGCylindrical Roller19034055680 kN23.5
20238-MBFAGSpherical Roller19034055650 kN22.5
30238FAGTapered Roller19034055530 kN20.8
30238-XLFAGTapered Roller19034055800 kN21.4
B7238-C-T-P4SFAGPrecision / Angular Contact19034055315 kN20

Same dimensions, same brand

DesignationBrandTypedDB/TDyn. ratingkg
6238NSKBall1903405557,300 lbs22.153
7238BNSKBall1903405563,700 lbs21.319
238NSKCylindrical Roller19034055124,000 lbs22.226
NU238ENSKCylindrical Roller19034055855 kN23
30238NSKTapered Roller19034055130,000 lbs20.103
HR30238NSKTapered Roller19034055880 kN21.4
7238NSKPrecision / Angular Contact19034055345 kN22.4
7238CNSKPrecision / Angular Contact1903405577,200 lbs22.104

Nearby bore sizes

DesignationBrandTypedDB/TDyn. ratingkg
7038A5NSKPrecision / Angular Contact1902904645,000 lbs11.204
7038CNSKPrecision / Angular Contact1902904655,300 lbs11.104
7238NSKPrecision / Angular Contact19034055345 kN22.4
7238CNSKPrecision / Angular Contact1903405577,200 lbs22.104
7338NSKPrecision / Angular Contact19040078495 kN47.5
7938A5NSKPrecision / Angular Contact1902603331,100 lbs5.121
7938CNSKPrecision / Angular Contact1902603333,100 lbs5.062
NN3038NSKPrecision / Angular Contact19029075133,000 lbs17.663

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