SIFT BEARING STORE CATALOG

20238-MBFAGSpherical Roller

20238-MB is a FAG spherical roller bearing, bore 190 mm, O.D. 340 mm, width 55 mm, dynamic rating 650 kN. Dimensions, drawing, interchanges and price.

Brass cage
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Bore d190mm
Outside dia. D340mm
Width B55mm
Dynamic Cr650kN
Static C0r950kN
Limiting speed2,290rpm
Weight22.5kg
Cr / C0r0.68
Mean dia. dm265mm

Original catalogue drawing - FAG Schaeffler HR 1, page 658

20238-MB FAG Spherical Roller 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
rChamfer (min)40.1575

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
Outside dia. D (mm)340
Width B (mm)55
Inner-ring shoulder dia. D1 (mm)301.2

Load ratings & speeds

Basic dynamic load rating Cr (lbs)146126
Basic static load rating Cor (lbs)213568
Basic dynamic load rating Cr (N)650000
Basic static load rating C0r (N)950000
Fatigue limit load Cur (N)80000
Limiting speed nG (rpm)2,290

Weight

Weight (kg)22.5

Mounting dimensions (fillets / shoulders)

Housing fillet r max (mm)4
Shaft shoulder da (mm)207
Housing shoulder Da (mm)323
Housing fillet ra max (mm)3

Bearing life (ISO 281 basic rating life)

C / PEquivalent load P (N)L10 (106 rev)L10h at 700 rpm
4162,5001022,419
6108,3333929,345
881,2501,02424,381
1065,0002,15451,296
1543,3338,323198,178

Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 650,000 N. Hours = L10 x 106 / (60n). Life-modification factors for lubrication, contamination and temperature (aISO) are not included.

Source & traceability

BrandFAG
Source catalogueFAG / Schaeffler Rolling Bearings HR 1
Catalogue pagep.658 (dimensions)

Load ratings in newtons, fatigue limit load Cur, limiting speed nG and reference speed nB.

Interchange - same dimensions, other brands

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
7238A5NSKPrecision / Angular Contact1903405573,900 lbs22.303
7238CNSKPrecision / Angular Contact1903405577,200 lbs22.104
30238TimkenTapered Roller19034055839 kN22.49

Same dimensions, same brand

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
30238FAGTapered Roller19034055530 kN20.8
30238-XLFAGTapered Roller19034055800 kN21.4

Nearby bore sizes

DesignationBrandTypedDB/TDyn. ratingkg
22238-BE-XLFAGSpherical Roller190340921360 kN36.8
22238-BE-XL-KFAGSpherical Roller190340921360 kN36
22338-BE-XLFAGSpherical Roller1904001322220 kN78.9
22338-BE-XL-JPA-T41AFAGSpherical Roller1904001322220 kN78.9
22338-BE-XL-KFAGSpherical Roller1904001322220 kN77.2
22338-BE-XL-K-JPA-T41AFAGSpherical Roller1904001322220 kN77.2
23038-E1-XL-K-TVPBFAGSpherical Roller190290751080 kN16.3
23038-E1-XL-TVPBFAGSpherical Roller190290751080 kN17.2

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